Signet 4150 Turbidimeter

C L I S T E D 113783 US 4150 Turbidimeter Features Description The 4150 Turbidimeter system provides accurate and reliable compliant water quality monitoring for municipal and industrial applications. The 4150 measures turbidity via a 90 degree light which reflects particles as they flow through a small volume, low flow glass cuvette. Air bubbles are eliminated from the cuvette by adjusting the backpressure valve on the outlet tube. The cuvette is located in a watertight dark chamber for continuously accurate on-line measurement. A replaceable desiccant pack provides a dry-stable environment to ensure reliable measurements. Simple and fast calibration can be accomplished in under five minutes by placing the In-line glass cuvette from the measuring chamber into the cuvette holder while still in service and the inlet and outlet tubing remains connected. The inexpensive calibration standard allows for dry and multiple system calibrations without mixing chemicals. After calibration, the unit is up and running with simple re-insertion of the glass cuvette back into the measuring chamber. Additional features include a message indicator when the desiccant needs replacing and as an option, auto/ ultrasonic cleaning of the glass Inline cuvette for longer runs between maintenance. The 4150 is available in two measuring ranges. The 0 to 100 NTU/FNU version is for low range applications such as drinking water. The 0 to 1000 NTU/ FNU range can be used for various applications including raw water and wastewater reclamation. Simple and easy single unit installation with built-in pressure regulator Versions compliant with either U.S. EPA 180.1 for North and South America and Asia or ISO 7027 for Europe Time saving and efficiencies of cuvette technology simplifies calibration Spannable 4-20 ma output Two adjustable alarm relays Bright backlit display Convenient holder for In-line cuvette Easy access for wiring and maintenance Ultrasonic cleaning option ensures long and steady on-line measurement Inexpensive standards allow for multiple system calibrations Applications Monitor Filter Performance Raw or Filtered Water Municipal Water Distribution Wastewater Reclamation and Tertiary Effluent Aquatic Life Support Systems Overview 4150 Turbidimeter 8 1 - Mounting Bracket 2 - Power Supply and Wiring Terminals 3 - Operator Interface with Display 4 - Desiccant Access (not shown) 5 - In-line Glass Cuvette (with Ultrasonic option) 6 - Backpressure Valve 7 - Cuvette Holder 8 - Shutoff Clamp 9 - Tubing and Fittings 10 - Measuring Cell Chamber 5 6 7 4 9 3 10 2 1 76 www.gfsignet.com

Dimensions Top View Front View 51 mm (2.0 in.) Cuvette Holder Measuring Cell 343 mm (13.5 in.) 226 mm (8.9 in.) Specifications General Flow Rate Range: 0.1 L/min to 1 L/min (0.026 GPM to 0.26 GPM) Measurement Range: 0 to 100.0 NTU/FNU or 0 to 1000.0 NTU/FNU Accuracy: ±2% of reading or ±0.02 NTU/FNU below 40 NTU/FNU whichever is greater ±5% of reading above 40 NTU/FNU NTU = FNU = FTU Mounting Horizontal plane, integral mounting bracket (with standard hole pattern) Use 4.75 mm (3/16 ) ID, 8 mm (5/16 ) OD flexible tubing for the water supply/ outlet (customer supplied) Maximum Inlet Pressure Integral pressure regulator rated 1380 kpa (200 psig) Maximum Outlet Pressure 100 kpa (15 psig) Operating Temperature/Pressure 1 C to 50 C (34 F to 122 F) (5 to 15 psig) 35 to 105 kpa Power Supply 100 240 VAC, 47 63 Hz, 80 VA Insulation Rating Double Insulated Pollution Degree 2 Overvoltage Category II Turbidity Side View 186 mm (7.34 in.) 102 mm (4.0 in.) Resolution up to 0.0001 NTU/FNU (below 10 NTU/FNU) Display Two-Line LCD w/backlight Alarm Relays 120-240 VAC, 2A Form C Relay Analogue Signal w/field Selectable Range Active 4-20 ma, 600 Ω or RS485 Wetted Materials Tubing: Vinyl Measuring cuvette: Borosilicate Glass Glass washer seal: Silicone Pressure regulator: Polypropylene 316 stainless steel Delrin by Dupont Inlet tube: 316 stainless steel Altitude 2000 meters (6,561 ft) maximum Relative Humidity Maximum 95% RH non-condensing Enclosure Rating IP 66 /NEMA 4X Environmental Conditions Not recommended for outdoor use Shipping Weight 2.5 kg 5.5 lb Standards and Approvals CE Compliant to U.S. EPA 180.1 Compliant to ISO 7027 ETL Listed UL 61010-1 and CSA C22.2 No. 61010-1 4150-0004 Glass cuvette with ultrasonic transducer 4150-0007 Glass cuvette without ultrasonic transducer (not shown) Ordering Information Part Number 3-4150 Measurement Range and Self Cleaning Options -1 White Light, 0 to 1000 NTU/FNU, no self cleaning U.S. EPA 180.1-2 Infrared, 0 to 1000 NTU/FNU, no self cleaning ISO 7027-3 White Light, 0 to 100 NTU/FNU, with ultrasonic auto self cleaning U.S. EPA 180.1-4 Infrared, 0 to 100 NTU/FNU with ultrasonic auto self cleaning ISO 7027-5 White Light, 0 to 1000 NTU/FNU, with ultrasonic auto self cleaning U.S. EPA 180.1-6 Infrared, 0 to 1000 NTU/FNU with ultrasonic auto self cleaning ISO 7027 3-4150 -3 Example Part Number Mfr. Part No. Code 3-4150-1 159 001 596 3-4150-2 159 001 597 3-4150-3 159 001 598 Mfr. Part No. Code 3-4150-4 159 001 599 3-4150-5 159 001 600 3-4150-6 159 001 601 Accessories and Replacement Parts Mfr. Part No. Code Description 3822-4001 159 001 585 Calibration kit, turbidity, 100, 10 & 0.02 NTU/FNU 3822-4003 159 001 586 Calibration kit, turbidity, 1000, 10 & 0.02 NTU/FNU 3-4150.380 159 001 588 Replacement desiccant 3822-4002 159 001 591 Formazin stock kit 3822-4000 159 001 592 Formazin stock solution, 4000 NTU/FNU, 500 ml 4150-0007 159 001 602 Replacement cuvette set (3 glass cuvettes) 4150-0004 159 001 589 Replacement cuvette with ultrasonic transducer 3-4150.386 159 001 652 O-ring kit for cuvette www.gfsignet.com 77

6 7 8 RELAY 1 4 10 RELAY 2 ph 2 12 0 14 ENTER Monitor 6 7 8 RELAY 1 4 10 RELAY 2 ph 2 12 0 14 ENTER Monitor 2724-2726 ph and ORP Electrodes Compatible with ALL Instruments Features Patented DryLoc connector with gold plated contacts Description Flat Glass The 2724-2726 ph and ORP Electrodes features a patented reference electrode design and uses the unique foul-proof patented DryLoc connector. The large area PE reference junction and pathway is constructed to increase the total reference effectiveness and ensures long service life. The DryLoc connector with corrosion resistant gold plated contacts readily connects the sensor to the mating 2760 preamplifier or the 2750 sensor electronics. The robust Ryton threaded sensor body and choice of flat ph, bulb ph, or flat ORP sensing elements provides broad range of chemical compatibility for a wide variety of applications. Protected Bulb There are two optional ph sensing versions available, HF and LC. The HF version is for applications where traces of hydrofluoric acid (2% or less) will attack standard ph glass in levels of ph 6 and below. The LC version can be used for low conductivity fluids (20-100 μs/cm recommended). The quick temperature response is available in either a PT1000 or 3 KΩ temperature sensor and allows compatibility with all ph/ ORP instruments. The 2724-2726 electrodes are general-purpose sensors ideal for a wide range of applications. The sensors incorporate ¾ NPT or ISO 7/1-R 3/4 threads for installing into standard pipe-tees. They can also be mounted directly into standard fittings, ½ to 4 inch. Mounts in standard fittings from DN15 to DN100 (½ to 4 in.) ¾ NPT or ISO 7/1-R 3/4 threaded sensors for use with reducing tees up to 4 in. Special design allows for installation at any angle, even inverted Ryton (PPS) body for broad range of chemical compatibility Patented* reference design for exceptional performance Quick temperature response HF resistant glass available for trace HF of <2% Optional Low conductivity sensor for liquids down to 20 μs/cm Applications System Overview In-Line Installation Panel Mount 4 to 20 ma Input Instrument Chart Recorder Programmable 5700 8750 8900 Logic Controller (sold separately) 2724-2726 DryLoc Electrodes and Threaded only for in-line installs 2750 (sold separately) Ryton (PPS) is a registered trademark of Chevron Phillips Chemical Co. LLC Go to www.cpchem.com for more information on Ryton OR 2750 2724-2726 DryLoc Electrodes PLC Submersible Installation Panel, Pipe, Tank, Wall Mount Instrument 5700 8750 8900 2750 or Pipe extension or conduit with 3/4 in. NPT or ISO 7/1-R 3/4 threads (customer supplied) 2724-2726 DryLoc Electrodes Water & Wastewater Treatment Neutralisation Systems Effluent Monitoring Sanitisation Systems Pool & Spa Control Aquatic Animal Life Support Systems Process Control Cooling Towers See Technical Reference section for assistance in choosing the correct sensor. U.S. Patent No.: 6,666,701 *Patents pending 78 www.gfsignet.com

Dimensions Flat electrode 0.64 mm (0.25 in.) 44.45 mm (1.75 in.) Yes 0 Horizontal 18.3 mm (0.72 in.) 109 mm (4.3 in.) Threads: ¾ in. NPT or ISO 7/1 R-3/4 25.4 mm (1.0 in.) Bulb Electrode 9.3 mm (0.37 in.) Yes 53.34 mm (2.1 in.) Yes Specifications General Performance Efficiency: >97% @ 25 C (77 F) Operating Range: ph: 0 to 14 ph ORP: ±2000 mv 3-2726-LC: Low Conductivity fluids; 20-100 μs/cm recommended 3-2726-HF: Hydrofluoric acid resist glass, ph 6 or below; trace HF <2% Compatibility: 2750 Electronics, 2760 Preamplifier ph Temperature Sensor: PT1000 versions are compatible with 2750 Sensor electronics for connection to a PLC or to the 8900 Multi- Parameter Controller. 3 KΩ Balco versions are compatible with the preamplifier for connection to the 5700 Monitor and the 8750 Transmitter. Process Connection: ¾ in. NPT ISO 7/1-R 3/4 Mounts into fittings Recommended Storage Temperature The best storage temperature for the 272X ph and ORP electrodes is 0 C to 50 C (32 F to 122 F) The electrode glass will shatter if shipped or stored at temperature below 0 C (32 F) The performance life of the electrode will shorten if stored at temperatures above 50 C (122 F) Mounting In-line Mounting: Use the sensor threads Use a standard fitting up to 4 in. Sensor can be mounted at any angle Submersible Mounting: Use threads on models 2750 or 2760 Requires ¾ inch NPT or ISO 7/1-R 3/4 male threaded liquid tight extension conduit. Shipping Weight 0.25 kg 0.55 lb Yes Yes Yes Mounting Angle Models 2724-2726 may be mounted at any angle without affecting the performance. Avoid locations with air pockets and sediment. Wetted Materials ph: Ryton (PPS), glass, UHMW PE, FPM ORP: Ryton (PPS), glass, UHMW PE, FPM, Platinum Max. Temperature/Pressure Rating Operating Temperature Range:* -10 C to 85 C (14 F to 185 F) Operating Pressure Range: -10 C to 65 C (14 F to 149 F): 0 to 100 psi 65 C to 85 C (149 F to 185 F), linearity derated 100 psi to 58 psi Standards and Approvals Manufactured under ISO 9001 for Quality and ISO 14001 for Environmental Management *Best performance for 2726-HF sensors is above 10 C (50 F) See Temperature and Pressure Graphs for more information for more information www.gfsignet.com 79

Electrode Key Features and Benefits: 4 1. Ryton body for chemical compatibility with most harsh chemicals. 2. Porous UHMW PE (ultra high molecular weight polyethylene) junction resists fouling and build-up. 3. Internal temperature sensor located in the glass stem for a quick temperature response. 4. DryLoc connector with corrosion resistant gold pins for quick and easy sensor removal. Resists moisture and dirt intrusion. 5. 6. 7. Threads for NPT or ISO process connection into reducing tees Use off-the-shelf GF reducing tees DN20 to DN100 (¾ to 4 in.). Mounts directly into fittings (½ in. 4 in.) for easy sensor retrofitting. Mount submersed into a tank via the 2750 or 2760 back threads. 1 3 5 2 5 Sensor in threaded reducing tee 6 Sensor in fitting 7 Sensor submersible installation Accessories Buffer Solutions The ph buffers are ideal for routine calibration requirements. The liquid solutions are conveniently packaged in one pint (473 ml) bottles. ph buffer kits in powder pillows are available for mixing fresh solutions with water at the time of use. All ph buffers are colour coded for easy identification; 4.01 ph is red, 7.00 ph is yellow, and 10.00 ph is blue. All ph buffers are traceable to NIST standards. These buffer solutions can be used to calibrate ORP sensors when saturated with quinhydrone. 80 www.gfsignet.com

Model 2724-2726 Ordering Notes 1) ph and ORP electrodes require connection to model 2750 sensor electronics or 2760 preamplifier. 2) Use the flat glass electrodes when a self-cleaning feature is desired; especially useful in applications with abrasive chemicals. 3) Use bulb protected electrodes for general purpose applications. 4) ORP electrodes are generally used for chemical reaction monitoring, not control. 5) The 2750 EasyCal feature recognises common ph and ORP buffer values of 4, 7 and 10 ph and 87 and 264 mv for ORP. Application Tips Use the flat glass electrodes when a self-cleaning feature is desired; especially useful in applications with abrasive chemicals. Use bulb protected electrodes for general purpose applications ORP electrodes are generally used for chemical reaction monitoring, not control. Ensure that sensor materials are chemically compatible with the process liquid. Keep electrode tip wet, avoid air pockets and sediment. Ordering Information ph Electrodes 3-2724 Flat glass ph 3-2726 Bulb glass ph 3-2726-HF Bulb glass ph, HF resistant 2% HF 3-2726-LC Bulb glass ph, Low conductivity applications, 20-100 μs/cm recommended Temperature Element - Choose One -0 PT1000; use with 2750 sensor electronics* -1 3 KΩ Balco; use with 2760 preamplifier** Threaded Process Connection 0 ¾ in. MNPT, Thread 1 ISO 7/1-R 3/4 Thread 3-2726 -1 1 Example Part Number ORP Electrodes 3-2725-6 Flat ORP with 10 k Ohm ID Resistor Threaded Process Connection 0 ¾ in. MNPT, Thread 1 ISO 7/1-R 3/4 Thread 3-2725-6 0 Example Part Number *The 2750 sensor electronics has a digital (S 3 L) output which is used with the 8900 Controller. It also has a 4 to 20 ma output for connections to PLC s, data recorders, etc. **The 2760 preamplifier is used for connection directly to 5700 Monitor or 8750 transmitter. Mfr. Part No. Code Mfr. Part No. Code Mfr. Part No. Code 3-2724-00 159 001 545 3-2726-10 159 001 555 3-2726-LC-00 159 001 557 3-2724-01 159 001 546 3-2726-11 159 001 556 3-2726-LC-01 159 001 558 3-2724-10 159 001 547 3-2726-HF-00 159 001 549 3-2726-LC-10 159 001 559 3-2724-11 159 001 548 3-2726-HF-01 159 001 550 3-2726-LC-11 159 001 560 3-2726-00 159 001 553 3-2726-HF-10 159 001 551 3-2725-60 159 001 561 3-2726-01 159 001 554 3-2726-HF-11 159 001 552 3-2725-61 159 001 562 Accessories and Replacement Parts Mfr. Part No. Code Description 3-2700.395 159 001 605 Calibration kit: includes 3 PP cups, cup stand, 1 pint ph 4.01, 1 pint ph 7.00 3822-7115 159 001 606 20 gm bottle Quinhydrone for ORP calibration (must use ph 4.01 and/or ph 7.00 buffer solutions) 3-2759 159 000 762 System Tester (adapter cable sold separately) 3-2759.391 159 000 764 2759 DryLoc Adapter Cable (for use with 2750 and 2760) 3-0700.390 198 864 403 ph Buffer Kit (1 each 4, 7, 10 ph buffer in powder form, makes 50 ml of each) 3822-7004 159 001 581 ph 4.01 buffer solution, 1 pint (473 ml) bottle 3822-7007 159 001 582 ph 7.00 buffer solution, 1 pint (473 ml) bottle 3822-7010 159 001 583 ph 10.00 buffer solution, 1 pint (473 ml) bottle www.gfsignet.com 81

0-250 +250 RELAY 1 RELAY 2-500 +500 ORP -750 +750-1000 Monitor +1000 ENTER 2774-2777 DryLoc Electrodes Features Durable DryLoc connector with gold plated contacts Special design allows for installation at any angle, even inverted Quick temperature response Description The 2774-2777 ph and ORP Electrodes feature a unique foul-proof DryLoc connector with gold-plated contacts designed specifically for use with the 2750 and 2760 preamplifiers, sensor electronics, and connectors. These dependable and highly responsive electrodes feature a PTFE double reference junction with KNO 3 in the front chamber to block various poisoning ions such as Copper (CU ++ ), Lead (Pb ++ ), Mercury (Hg ++ ), and a large reference chamber that combine to extend the servicelife. Embedded positioning of the System Overview Panel Mount Instrument 5700 8750 8900 2750 or 4 to 20 ma Input Chart Recorder OR 2750 Programmable Logic Controller PLC Flat Glass Protected Bulb In-Line Installation temperature element in the ph sensing tip allows, the temperature response to be quick and accurate. The electrodes are offered with either flat or bulb style sensing elements. The flat versions allow sediment and particles to sweep past the measurement surface, minimizing risks of abrasion, breakage and coating. The bulb versions can be used for general-purpose applications. Due to the specially designed chambers which keep electrolyte in place, all versions can be installed at any angle, even inverted. Pipe, Tank or Wall Mount Other Instruments Instrument Customer supplied 8750 Universal Adapter Kit (3-8050) Flow Submersible Installation Panel, Pipe, Tank, Wall Mount or Other Instrument 5700 8750 8900 Pipe extension or conduit with 3/4 in. FNPT threads (customer supplied) 2750 or Easy sensor replacement using DryLoc electrode connector High temperature versions available Mounts into standard ¾ inch threads Compatible with all instruments Applications Water Treatment & Water Quality Monitoring Demineraliser, Regeneration & Rinse Cooling Tower and Boiler Protection Aquatic Animal Life Support Systems Pool and Spa Control Neutralisation Systems 2774-2777 DryLoc Electrodes 2774-2777 DryLoc Electrodes Fittings - Customer supplied See Technical Reference section for assistance in choosing the correct sensor. 82 www.gfsignet.com

Dimensions 35.5mm (1.4 in.) 128.3mm (5.05 in.) 43mm (1.7 in.) 3/4 in. NPT 22.8mm (0.9 in.) 35.5mm (1.4 in.) 38.6mm (1.52 in.) 29.2mm (1.15 in.) 22.1mm (0.87 in.) Bulb Electrode 38.6mm (1.52 in.) 29.2mm (1.15 in.) 0.64 mm (0.25 in.) insertion depth, typical Specifications General Compatibility: Models 2750 and 2760 Operating Range: 2774/2776: 0 to 14 ph 2775/2777: +/-2000 mv (ORP) Process Connection: ¾ in., for use in reducing tees up to 4 in Reference: Electrolyte: KNO 3 /KCl acrylamide gel Element: Ag/AgCl Primary Functions: 2774 and 2775: Flat surface resists fouling 2776 and 2777: Bulb surface for general use Wetted Materials Body: Ryton Reference junctions: PTFE Sensing surface: Glass membrane: (ph) Platinum: (ORP) O-rings: FPM Recommended Storage Temperature The best storage temperature for the 272X ph and ORP electrodes is 0 C to 50 C (32 F to 122 F) The electrode glass will shatter if shipped or stored at temperature below 0 C (32 F) The performance life of the electrode will shorten if stored at temperatures above 50 C (122 F) Mounting In-line/vertical mounting: Use the electrodes ¾ inch threads to install into pipe fitting. Electrode can be mounted at any angle. Submersible mounting: Use threads on Model 2750 or 2760; requires ¾ inch NPT or ISO 7/1-R 3/4 male threaded extension. Temperature Sensor: ph: 3 KΩ or PT1000 RTD ORP: none Shipping Weight 0.25 kg 0.55 lb 128.3mm (5.05 in.) 32mm (1.3 in.) 3/4 in. NPT 22.1mm (0.87 in.) Flat Electrode 0.64 mm (0.25 in.) insertion depth, typical Max. Temperature/Pressure Rating Operating Temperature: 0 C to 85 C (32 F to 185 F) Maximum Operating Pressure: 6.9 bar (100 psi) Storage Temperature: > 0 C (32 F) Higher temperature and pressure sensors are available. Standards and Approvals Manufactured under ISO 9001 for Quality www.gfsignet.com 83

Electrode Key Features and Benefits: Ryton body for chemical compatibility to most harsh chemicals. Also able to withstand high temperatures. Porous PTFE reference junctions are highly chemically resistant; resists fouling and dirt buildup. First reference chamber with KNO 3 protects Ag/AgCl wire for a prolonged sensor life. Capillary TC (temperature sensor) embedded in tip of ph electrode for quicker temperature response than most other electrodes on the market. DryLoc connector with corrosion resistant gold pins for quick and easy sensor removal. Reference Ag/AgCl Wire Double Porus PTFE Reference Junctions DryLoc Connector Ryton Body Reference Electrolyte Chamber 1 st Reference Chamber with KNO 3 Model 2774-2777 Ordering Notes 1) ph and ORP sensors require connection to model 2750 or 2760. 2) Conduit and mounting brackets for submersible installation must always be used (customer supplied). 3) All of these sensors can be installed upsidedown. 4) Special order options may have longer delivery time. Consult your local Georg Fischer sales representative for lead times. Electrode Capillary TC Electrode Cut-Away View Application Tips Use the flat glass electrodes for in-line ph sensor applications when a self-cleaning feature is desired; especially useful in applications with abrasive chemicals. Use bulb protected electrodes for general purpose applications ORP electrodes are generally used for chemical reaction monitoring, not control. Ensure that sensor materials are chemically compatible with the process liquid. Keep electrode tip wet, avoid air pockets and sediment. 84 www.gfsignet.com

Ordering Information Electrode Part Number- Choose Either a ph or ORP Electrode ph Electrodes 3-2774 Flat ph surface electrode 3-2776 Bulb ph electrode with bulb protection Temperature Element - Choose One - 3K Ohm RTD for ph for connection to 8750 or 5700 instruments when used with the 2760 preamplifier** -1 PT1000 RTD for ph for connection to the 8900 when used with the 2750 sensor electronics* Special Order Options for ph Electrodes - Options -HT and -C can only be used with the 3-2721 Preamplifier. (These options cannot be used with the 2750 or 2760) -HT For high temperature and high pressure applications, up to 110 C (230 F) @ 150 psig; DryLoc connector is removed and replaced with a 4.6 m (15 ft) cable. -C Remove DryLoc connector and add 4.6m (15 ft) cable. Other cable lengths are available -ISO ISO 7/1-R 3/4 Threaded electrodes are available. ORP Electrodes 3-2775 Flat ORP surface electrode 3-2777 Bulb ORP electrode with bulb protection Temperature Element - Choose One - 10 K ID resistor for ORP electrodes for connection to the 8750 and 5700 when used with the 2760 preamplifier or the 8900 when used with the 2750 sensor electronics -1 No T.C. for ORP electrodes for use with other suppliers instruments when used with the 2760 connector Special Order Options for ORP Electrodes - Options -HT and -C can only be used with the 3-2721 Preamplifier (These options cannot be used with the 2750 or 2760 -HT For high temperature and high pressure applications, up to 110 C (230 F) @ 150 psig; DryLoc connector is removed and replaced with a 4.6 m (15 ft) cable. -C Remove DryLoc connector and add 4.6 m (15 ft) cable. Other cable lengths are available -ISO ISO 7/1-R 3/4 Threaded electrodes are available. 3-2775 Example Part Number *The 2750 sensor electronics has a digital (S 3 L) output which is used with the 8900 Controller. It also has a 4 to 20 ma output for connections to PLC s, data recorders, etc. **The 2760 preamplifier is used for connection directly to 5700 Monitor or 8750 transmitter. Mfr. Part No. Code Mfr. Part No. Code 3-2774 159 000 955 3-2776 159 000 959 3-2774-1 159 000 956 3-2776-1 159 000 960 3-2775 159 000 957 3-2777 159 000 961 3-2775-1 159 000 958 3-2777-1 159 000 962 Accessories and Replacement Parts Mfr. Part No. Code Description 3-2700.395 159 001 605 Calibration kit: includes 3 PP cups, cup stand, 1 pint ph 4.01, 1 pint ph 7.00 3822-7115 159 001 606 20 gm bottle Quinhydrone for ORP calibration (must use ph 4.01 and/or ph 7.00 buffer solutions) 3-0700.390 198 864 403 ph buffer kit (1 each 4, 7, 10 ph buffer in powder form, makes 50 ml of each) 3822-7004 159 001 581 ph 4 buffer solution, 1 pint (473 ml) bottle 3822-7007 159 001 582 ph 7 buffer solution, 1 pint (473 ml) bottle 3822-7010 159 001 583 ph 10 buffer solution, 1 pint (473 ml) bottle 3-2759 159 000 762 system tester 3-2759.391 159 000 764 Adapter cable for use with 2750/2760 3-2721 198 864 610 Remote mount preamplifier Please refer to Wiring, Installation, and Accessories sections for more information. www.gfsignet.com 85

0-250 +250 1 RELAY 2-500 +500 ORP -750 +750-1000 Monitor +1000 ENTER 2764-2767 Differential DryLoc Electrodes Features Differential design for stable measurements in the most aggressive applications Long service life even in severe or difficult chemical applications Water-tight DryLoc connector with foulproof gold contacts Description The 2764-2767 Differential ph & ORP electrodes are built with the DryLoc connector, a Ryton body, and PTFE reference junction to handle the most extreme and harshest of chemical applications. These differential electrodes use a field-proven 3-electrode differential technique: the ph and reference electrodes are measured against a ground electrode, insuring a steady and stable signal. A key feature is the reference electrode, which is housed in a glass half-cell embedded in the reference chamber and is protected from compounds that may contain sulfides (S2 - ) and metals. To ensure long service life, the reference features a refillable electrolyte chamber and a replaceable equitransferant salt bridge, both easily serviced in the field. The patented porous PTFE reference junction resists fouling, clogging and chemical attack. System Overview Panel Mount Instrument RELAY 5700 8750 8900 Programmable 8750 Logic Controller 2750 or 4 to 20 ma Input Chart Recorder OR 2750 In-Line Installation PLC Other elements of the design are the solution ground, the electrodes, and the temperature element. The solution ground eliminates noisy measurements by draining electrical current away from the reference electrode. The electrodes are designed with a flat or bulb measurement surface, and a temperature device that is positioned at the tip of the measurement surface, making the temperature response of T 95% less than 1 minute. Various temperature devices offered include 3 KΩ, 300 Ω, or PT1000 RTD. The electrodes are used with the 2750 Sensor Electronics, which provide a blind 4 to 20 ma output or use the digital (S 3 L) output to connect the 8900 Multi-Parameter Controller. The electrodes can also be used with the Model 2760 preamplifier to connect to the 5700 or 8750. Pipe, Tank or Wall Mount Other Instruments Instrument Customer supplied Universal Adapter Kit (3-8050) Flow Submersible Installation Panel, Pipe, Tank, Wall Mount or Other Instrument 5700 8750 8900 Pipe extension or conduit with 3/4 in. FNPT threads (customer supplied) 2750 or Porous PTFE reference junction Rebuildable reference electrode Solution ground Temperature sensor (ph) Easy sensor replacement using DryLoc electrode connector Quick temperature response Compatible with all and other suppliers instruments Applications Water and Waste Water Treatment Coagulation and Flocculation Plant Effluent Plating Baths Scrubbers Textile Dye Process Harsh Chemical Applications Heavy metal Removal and Recovery Toxics Destruction Surface Finishing 2764-2767 Differential Electrodes 2764-2767 Differential Electrodes Fittings - Customer supplied See Technical Reference section for assistance in choosing the correct sensor. 86 www.gfsignet.com

Dimensions 35.6mm (1.4 in.) 133.8 mm (5.27 in.) 1 in. NPT 38.6 mm (1.52 in.) 32.5 mm (1.28 in.) 25.4 mm (1.0 in.) 0.63 mm (0.25 in.) insertion depth, typical 28.7 mm (1.13 in.) Specifications General Compatibility: 2750 and 2760 Operating Range: 2764/2766: 0 to 14 ph 2765/2767: +/-1500 mv (ORP) Process Connection: 1 in., for use in reducing tees up to 4 in. Wetted Materials Body: Ryton Reference Junctions: PTFE Sensing Surface: Glass membrane: (ph) Platinum: (ORP) O-rings: FPM Solution Ground: carbon graphite Max. Temperature/Pressure Rating Operating Temperature: 0 C to 95 C (32 F to 203 F) Max. Operating Pressure: 6.89 bar (100 psi) @ 95 C (203 F) Storage Temperature: > 0 C (32 F) Mounting In-line/vertical mounting: Use sensor 1 inch threads. Sensor must be mounted at least 15 degrees above the horizontal axis. Submersible mounting: Use threads on Model 2750 or 2760; requires ¾ inch NPT or ISO 7/1-R 3/4 inch male threaded extension. Reference: Electrolyte: 3.5 M KCl, solidified acrylamide gel Element: Ag/AgCl Temperature Sensor: ph: 3 KΩ, PT1000 RTD, or 300 Ω ORP: 10K ID Resistor, PT1000 RTD, or 300 Ω Primary Functions: 2764 and 2765: Flat surface resists fouling 2766 and 2767: Bulb surface for general use Flat and Bulb versions have the same dimensions Recommended Storage Temperature The best storage temperature for the 276X ph and ORP electrodes is 0 C to 50 C (32 F to 122 F) The electrode glass will shatter if shipped or stored at temperature below 0 C (32 F) The performance life of the electrode will shorten if stored at temperatures above 50 C (122 F) Shipping Weight 0.25 kg 0.55 lb Standards & Approvals Manufactured under ISO 9001 for Quality A Differential electrode solves many common problems typically experienced by standard electrodes at troublesome measuring points. See the table below to find the common problem, cause and effect, and the Differential electrode solution. If the standard ( Models 272X or 277X) electrode experiences the following: *Reading slowly drifts over time *Sensor responds slowly *Reading slowly drifts over time *Sensor reading becomes erratic *Reading suddenly jumps to a new value *Reading unexpectedly changes The cause and effect of the problem may be: *Chemical attack from Hg ++, Cu +, Pb ++, ClO 4 - or other compounds which dilute the KCl reference electrolyte concentration. *Reference junction gets clogged from oils, grease, and dirt from the process. *Chemical attack of the Ag+ reference billet from Br -, I -, CN -, and S 2 - compounds. *Clogged reference and slowed reading from silver compounds forming on the inside of the reference electrode from Ag + of reference element reacting and precipitating AgS, AgBr, AgI, AgCN, or other silver compounds. *Stray electrical currents in the process liquid; Ag + reference element picks up current and shifts reference reading, resulting in shifted ph reading. The Ag + element will eventually become totally stripped. Process must be properly grounded or place metal rod close to electrode. Use a Differential Electrode to solves the problem because: *Salt bridge will slow or stop attack. If attacking ions penetrate the salt bridge and affect the KCl, simply refill KCl solution *Readings do not drift due to stable Differential reference design, however may require cleaning or replacement of the salt bridge if electrode gets too dirty. *Will not affect electrode due to Ag + element protected in glass encased reference electrode. *Will not affect electrode due to Ag + element protected in glass encased reference electrode *Will not affect electrode due to Ag + element protected in glass encasement; also, electrode has a built in solution ground, so if there is a stray current, it will not be seen by the electrode Ion Ion name Ion Ion name Compound Compound name Br - Bromide Hg ++ Mercury KCl Potassium Chloride Cu + Copper iron - CIO 4 Perchlorate AgS Silver sulfide CN - Cyanide Ag + Silver AgBr Silver bromide I - Iodide - S 2 Sulfide AgI Silver iodide Pb ++ Lead AgCN Silver cyanide www.gfsignet.com 87

Electrode Key Features and Benefits: Glass encased reference electrode protects the Ag/AgCl (silver/silver chloride) element from reacting with certain chemical compounds that typically leach into the reference chambers. Keeps the reading stable. Large volume reference electrolyte chamber resists dilution over time for a long service life. Chamber is refillable. Holds approximately 30 ml of electrolyte Salt Bridge serves as a double reference junction and is the first line of defence to keep out process chemicals from the reference electrolyte chamber. It is built with a porous PTFE reference junction which is highly compatible to chemicals, resists fouling and build-up of dirt. Ryton body for chemical compatibility to most harsh chemicals. Also able to withstand high temperatures. DryLoc connector with corrosion resistant gold pins for quick and easy sensor removal. Capillary TC (temperature sensor) embedded in tip of electrode for quicker temperature response than most other electrodes on the market. Removable/replaceable reference salt bridge Electrode Cut-Away View Glass enclosed reference silver chloride element Reference Chamber with electrolyte Temperature Element electrode Solution ground Application Tips Use the flat glass electrodes when a self-cleaning feature is desired; especially useful in applications with abrasive chemicals. Use bulb protected electrodes for general purpose applications ORP electrodes are generally used for chemical reaction monitoring, not control. Ensure that sensor materials are chemically compatible with the process liquid. Keep electrode tip wet, avoid air pockets and sediment. 88 www.gfsignet.com

Model 2764-2767 Ordering Notes 1) ph and ORP electrodes require connection to model 2750 or 2760. 2) Conduit and mounting brackets for submersible installations must always be used (customer supplied) 3) Adapters from 1-1½ in. are available. 4) Use sensor threads for in-line mounting; Model 2750 or 2760 threads for submersible mounting. 5) Reference electrode can be rebuilt with replacement electrolyte and salt bridge. Ordering Information Electrode Part Number- Choose Either a ph or ORP Electrode ph Electrode 3-2764 Flat ph surface differential electrode 3-2766 Bulb ph differential electrode with bulb protection Temperature Element - Choose One -1 3K Ω for ph for connection to 8750 or 5700 instruments when used with the 2760 preamplifier** -2 PT1000 RTD for ph for use with the 8900 instrument when used with the 2750 sensor electronics* -3 300 Ω for connection to other instruments when used with the 2760 preamplifier or connector** ORP Electrode 3-2765 Flat ORP surface differential electrode 3-2767 Bulb ORP differential electrode with bulb protection Temperature Element - Choose One -1 10 KΩ ID resistor for connection to 8750 or 5700 when used with the 2760 preamplifier or connection to the 8900 with the 2750 sensor electronics -2 PT1000 RTD for connection to other instruments using the 2760 preamplifier or connector -3 300 Ω for connection to other instruments using the 2760 preamplifier or connector** 3-2765 -1 Example Part Number *The 2750 sensor electronics has a digital (S 3 L) output which is used with the 8900 Controller. It also has a 4 to 20 ma output for connections to PLC s, data recorders, etc. **The 2760 preamplifier is used for connection directly to 5700 Monitor or 8750 transmitter. Mfr. Part No. Code 3-2764-1 159 000 943 3-2764-2 159 000 944 3-2764-3 159 000 945 3-2765-1 159 000 946 3-2765-2 159 000 947 3-2765-3 159 000 948 Mfr. Part No. Code 3-2766-1 159 000 949 3-2766-2 159 000 950 3-2766-3 159 000 951 3-2767-1 159 000 952 3-2767-2 159 000 953 3-2767-3 159 000 954 Accessories and Replacement Parts Mfr. Part No. Code Description 3-2700.395 159 001 605 Calibration kit: includes 3 PP cups, cup stand, 1 pint ph 4.01, 1 pint ph 7.00 3822-7115 159 001 606 20 gm bottle Quinhydrone for ORP calibration (must use ph 4.01 and/or ph 7.00 buffer solutions) 3864-0001 159 001 007 Replacement salt bridge 3864-0002 159 001 008 Replacement reference electrolyte solution, 500 mls 2120-0015 159 001 009 CPVC adapter: 1.5 in. MNPT to 1 in. FNPT 2122-0015 159 001 010 PVDF adapter: 1.5 in. MNPT to 1 in. FNPT 3-0700.390 198 864 403 ph buffer kit (1 each 4, 7, 10 ph buffer in powder form, makes 50 ml of each) 3822-7004 159 001 581 ph 4 buffer solution, 1 pint (473 ml) bottle 3822-7007 159 001 582 ph 7 buffer solution, 1 pint (473 ml) bottle 3822-7010 159 001 583 ph 10 buffer solution, 1 pint (473 ml) bottle 3-2759 159 000 762 system tester 3-2759.391 159 000 764 Adapter cable for use with 2750/2760 www.gfsignet.com 89

6 7 8 RELAY 1 4 10 RELAY 2 ph 2 12 0 14 ENTER Monitor Flow 3719 Wet-Tap Assembly Features 3719 Assembly Description The 3719 Wet-Tap allows installation and removal of ph or ORP electrodes, even under process pressure, without the need for process shutdown during routine electrode maintenance and calibration. Automatic process isolation is achieved during electrode retraction with a double O-ring seal on a unique and compact retraction assembly; Wet-Tap Electrode no separate valve is required. A patented cam-activated automatic locking mechanism, SafeLoc, and the short stroke design help to assure operator safety. The wet-tap unit can be mounted at any angle and can be used with the DryLoc Wet- Tap electrodes. Electrode removal without process shutdown Space saving 45 mm (1.75 in.) short-stroke design Sealed pneumatic dampening for smooth and safe operation SafeLoc : Cam- activated automatic locking mechanism Protects electrode sensing surface from breakage Suitable for mounting in any orientation Process threaded connection NPT or ISO Low profile clampon saddle fittings for convenient installation in ASTM pipe sizes 2½ to 12 in. Applications System Overview Panel Mount Instrument 2750 or 2760 (sold separately) 4 to 20 ma Input Chart Recorder OR Programmable Logic Controller PLC 2750 (sold separately) Wet-Tap Installation Pipe, Tank or Wall Mount Instrument (sold separately) Universal Adapter Kit (3-8050) 2760 Other Instruments (customer supplied) connector (-3 or -4 only) Aquatic Animal Life Support Systems Recreational Water Monitoring Water & Wastewater Treatment Effluent Monitoring Neutralisation Systems Sanitisation Systems Pool and Spa Control 3719 Wet-Tap Assembly 2756-WT, 2756-WTP 2757-WT, 2757-WTP + GF PP Clamp-On Saddles for 3719 Wet-Tap or GF Tees and Fittings see model 3719 for more info 90 www.gfsignet.com

Dimensions Specifications 3719-1X For pipe sizes up to 4 in. Pipe thread 1.5 in. NPT or ISO 7-R1.5 82.5 mm (3.25 in.) insertion depth, typical 39 mm (1.52 in.) 76 mm (3.0 in.) 49 mm (1.94 in.) 75 mm (2.94 in.) 25 mm (1.00 in.) 45 mm (1.75 in.) 20 mm (0.8 in.) 130 mm (5.13 in.) 3719-2X For pipe sizes 6 to 12 in. 3719 Wet-Tap General Compatible DryLoc Electrodes: 2756-WT, 2756-WT-1 (glass) 2756-WTP, 2756-WTP-1 (plastic) 2757-WT (glass) 2757-WTP (plastic) Process Connection: 3719-11: NPT 1½ in. 3719-21: NPT 2 in. 3719-12: ISO 7/1 - R 1.5 3719-22: ISO 7/1 - R 2 Maximum Flow Velocity: 3 m/s (10 ft/s) Materials Retraction Housing (Wetted): CPVC O-rings (Wetted): FPM Locking Shroud: PVC Hardware: 316 stainless steel Max. Temperature/Pressure Rating Operating Pressure: 100 psi (6.9 bar) maximum Operating Temperature: See Temperature/Pressure graphs for more information Shipping Weight 1.2 kg 2.7 lb Standards/Approvals Manufactured under ISO 9001 for Quality and ISO 14001 for Environmental Management Pipe thread 2 in. NPT or ISO 7-R2 82.5 mm (3.25 in.) insertion depth, typical 39 mm (1.52 in.) 76 mm (3.0 in.) 130 mm (5.13 in.) 34 mm (1.32 in.) 75 mm 41 mm (2.94 in.) (1.62 in.) 20 mm (0.8 in.) 45 mm (1.75 in.) Model 3719 Ordering Information 1) Use a mounting saddle or a standard threaded part to mount Wet-Tap assembly. 2) ASTM fittings are available to order; metric fittings are customer supplied. 3) Use -11 or -12 versions for pipe sizes up to 4 in. 4) Use -21 or -22 versions for pipe sizes 6 to 12 inches. Low Profile Clamp-on Saddle Fittings Materials Saddle body (Wetted): Polypropylene (Grade 8, ASTM D2565, 1-8, UV stabilized) Gasket (Wetted): FPM Saddle Hardware: 316 stainless steel Reinforcement Ring: 430 stainless steel Size range: 2½ to 12 in. (ASTM) Ordering Information Wet-Tap Part Number 3-3719 Wet-Tap Assembly Mounting Options - Choose one -11 1½ inch NPT process threads for 2½ to 4 in. pipes -12 ISO 7/1-R 1.5 process threads for 2½ to 4 in. pipes -21 2 inch NPT process threads for 6 to 12 in. pipes -22 ISO 7/1-R 2 process threads for 6 to 12 in. pipes 3-3719 -11 Example Part Number Mfr. Part No. Code Mfr. Part No. Code 3-3719-11 159 000 804 3-3719-21 159 000 805 3-3719-12 159 000 806 3-3719-22 159 000 807 www.gfsignet.com 91

Specifications 2756-WT and 2757-WT Wet-Tap Electrodes General Compatibility: 3719 Wet-Tap Assembly, 2750 sensor electronics or 2760 preamplifier Operating Range: ph: 0 to 14 ph ORP: Application dependent Connector (CPVC): DryLoc Temperature Sensor (ph): PT1000 or 3K Balco for ph Response time, τ : 438 secs. Reference junctions: Porous PTFE Electrolyte: 3.5M KCl Elements: Ag/AgCl Performance Efficiency: > 97% @ 25 C (77 F) Response Time ph: < 5s for 95% of signal change ORP: Application dependent Impedance (ph): < 150 MΩ @ 25 C Sodium Ion Error: < 0.05 ph in 0.1 molar Na+ ion at 12.8 ph Wetted Materials Body: Glass or PAS (Poly Aryl Sulphone) Reference Junctions: Porous PTFE Sensing surface: Glass membrane (ph) Platinum (ORP) O-rings: FPM Connector: CPVC Max. Temperature Rating Operating Temperature: 0 C to 85 C (32 F to 185 F) Storage Temperature: 0 C to 85 C (32 F to 185 F) Mounting: Any angle is acceptable. Use with 3719 wet-tap assembly for mounting electrodes. Shipping Weight 0.2 kg 0.4 lb Standards and Approvals Manufactured under ISO 9001 for Quality Dimensions 3-2756 Wet-Tap ph 3-2757 Wet-Tap ORP 35 mm (1.4 in.) 218 mm (8.57 in.) 11.9 mm (0.47 in.) Product selection Guide: Step 1 - Choose Sensor Step 2 - Choose preamplifier or sensor electronics Step 3 - Choose Wet-Tap assembly Step 4 - Choose mounting option 1 Wet-Tap ph or ORP Sensor: 3-2756-WT 3-2756-WT-1 3-2756-WTP 3-2756-WTP-1 3-2757-WT 3-2757-WTP 2 OR OR 2760 Preamplifier: 3-2760-11 3-2760-21 2760 Connector: 3-2760-31 3-2760-41 2750 Sensor Electronics: 3-2750-1 3-2750-2 3 3719 Wet-Tap Assembly: 3-3719-11 3-3719-12 3-3719-21 3-3719-22 3 3719 Wet-Tap Assembly: 3-3719-11 3 3719 Wet-Tap Assembly: 3-3719-11 3-3719-21 4 OR OR Georg Fischer Tees and Fittings 3719 Clamp-On Saddles: 2007-0225 2007-0230 2007-0240 3719 Clamp-On Saddles: 2007-0260 2007-0280 2007-0210 2007-0212 92 www.gfsignet.com

Model 2756-2757 Ordering Notes 1) ph and ORP electrodes require connection to model 2750-1 or -2 or 2760-X1. Ordering Information Wet-Tap Assembly Compatible Electrodes 3-2756-WT DryLoc ph (glass) Electrode (Used with 2750 sensor electronics) - PT1000 3-2756-WT-1 DryLoc ph (glass) Electrode (Used with 2760 Preamplifier) - 3 KΩ 3-2757-WT DryLoc ORP (glass) Electrode (Used with 2750 sensor electronics or 2760 preamplifier) 3-2756-WTP DryLoc ph (plastic) Electrode (Used with 2750 sensor electronics) - PT1000 3-2756-WTP-1 DryLoc ph (plastic) Electrode (Used with 2760 Preamplifier) - 3 KΩ 3-2757-WTP DryLoc ORP (plastic) Electrode (Used with 2750 sensor electronics or 2760 preamplifier) *The 2750 sensor electronics has a digital (S 3 L) output which is used with the 8900 Controller. It also has a 4 to 20 ma output for connections to PLC s, data recorders, etc. **The 2760 preamplifier is used for connection directly to 5700 Monitor or 8750 transmitter. Mfr. Part No. Code Mfr. Part No. Code 3-2756-WT 159 000 834 3-2756-WTP-1 159 001 384 3-2756-WT-1 159 001 383 3-2757-WT 159 000 835 3-2756-WTP 159 001 390 3-2757-WTP 159 001 391 Accessories and Replacement Parts Mfr. Part No. Code Description 3-2700.395 159 001 605 Calibration kit: includes 3 PP cups, cup stand, 1 pint ph 4.01, 1 pint ph 7.00 3822-7115 159 001 606 20 gm bottle Quinhydrone for ORP calibration (must use ph 4.01 and/or ph 7.00 buffer solutions) Mounting Saddles 2007-0225 159 000 812 PP Clamp-on Saddle, 2.5 x 1.5 in. (ASTM, NPT) 2007-0230 159 000 813 PP Clamp-on Saddle, 3 x 1.5 in. (ASTM, NPT) 2007-0240 159 000 814 PP Clamp-on Saddle, 4 x 1.5 in. (ASTM, NPT) 2007-0260 159 000 815 PP Clamp-on Saddle, 6 x 2 in. (ASTM, NPT) 2007-0280 159 000 816 PP Clamp-on Saddle, 8 x 2 in. (ASTM, NPT) 2007-0210 159 000 817 PP Clamp-on Saddle, 10 x 2 in. (ASTM, NPT) 2007-0212 159 000 818 PP Clamp-on Saddle, 12 x 2 in. (ASTM, NPT) Other 1220-0114 159 000 854 3719 O-ring, FPM (spare part) 1224-0205 159 000 836 O-ring, EPR (EPDM) 3-3719.390 159 000 855 3719 Locking Shroud (spare part) 3-0700.390 198 864 403 ph buffer kit (1 each 4, 7, 10 ph buffer in powder form, makes 50 ml of each) 3822-7004 159 001 581 ph 4 buffer solution, 1 pint (473 ml) bottle 3822-7007 159 001 582 ph 7 buffer solution, 1 pint (473 ml) bottle 3822-7010 159 001 583 ph 10 buffer solution, 1 pint (473 ml) bottle Please refer to Wiring, Installation, and Accessories sections for more information. www.gfsignet.com 93

2750 DryLoc Sensor Electronics Features In-line integral mount and submersible installation versions Automatic temperature compensation For fittings up to 4 in. and wet tap assemblies. In-line 2750 Submersible 2750 In-line when electrode has ¾ in. or 1 in. process connection DryLoc Electrodes sold separately. Auto configuration for ph or ORP operation Optional EasyCal calibration aid with automatic buffer recognition Junction boxes for convenient wiring Description The 2750 Sensor Electronics featuring the DryLoc connector, provides a variety of functions to suit various requirements. The 2750 has a preamplified signal and features two different outputs: a two-wire 4 to 20 ma loop output with EasyCal function or a digital (S 3 L) output which allows for longer cable lengths and is compatible with the 8900 Multi-Parameter Controller. The 2750 self-configures for ph or ORP operation via automatic recognition of the electrode type. The optional EasyCal feature allows simple pushbutton calibration and includes an LED indicator for visual feedback. The DryLoc electrode connector quickly forms a robust assembly for submersible and in-line installations. NEMA 4X junction enclosures are integral parts of the 2750 in-line version and are also available as accessories for the submersible 2750. The 2750 submersible preamplifier can also be used as an In-line preamplifier when used with the 3/4 or 1 threaded sensors including the 2724, 2774 and 2764 series electrodes. The 2750 In-line preamplifier can be used with fittings up to DN100 (4 in.) and wet-tap assemblies. Applications Water/Wastewater Treatment Neutralisation Systems Scrubber Control Effluent Monitoring Surface Finishing Flocculent Coagulation Heavy Metal Removal and Recovery Toxics Destruction Sanitisation Systems Pool & Spa Control Aquatic Animal Life Support Systems System Overview Panel Mount 8900 Multi-Parameter Controller In-Line Installation 4 to 20 ma Input Chart Recorder Programmable Logic OR Controller PLC Submersible Installation Panel Mount 8900 Multi-Parameter Controller Wet-Tap Installation 4 to 20 ma Input Chart Recorder OR Programmable Logic Controller PLC 2750 Sensor Electronics Universal junction box (3-8050-2) EasyCal (sold separately) 2750 Sensor Electronics Pipe extension or conduit with 3/4 in. NPT or ISO 7/1-R 3/4 threads (customer supplied) 2750 Sensor Electronics with Wet-Tap Electrode 2756, 2757 (each sold separately) 2750 Sensor Electronics DryLoc Electrodes 2724-2726, 2764-2767, 2774-2777 2750 Sensor Electronics 3719 Wet-Tap 2724-2726 DryLoc Electrodes: Use GF Fittings* or 3/4 in. NPT fittings (customer supplied) 2764-2767 and 2774-2777 DryLoc Electrodes: Use 3/4 in. or 1 in. NPT fittings (customer supplied) *See Fittings section for more information. DryLoc Electrodes 2724-2726, 2764-2767, 2774-2777 GF PP Clamp-On Saddles for 3719 Wet-Tap or GF Tees and Fittings see model 3719 for more info 94 www.gfsignet.com

Dimensions 3-2750-1,-2 1/2 in. FNPT 3-2750-3, -4 31.75mm (1.25 in.) 70.1mm (2.76 in.) 94 mm (3.7 in.) 56.6mm (2.23 in.) 140 mm (5.5 in.) 3/4 in. ISO or 3/4 FNPT threads 89.4mm (3.52 in.) Specifications General Compatible Electrodes: DryLoc ph and ORP Electrodes Models 2724-2726, 2756-2757 Wet-Tap, 2764-2767, 2774-2777, Operating Range: ph: 0 to 14 ph ORP: ± 2,000 mv Response Time: ph: < 6 sec. for 95% of change ORP: application dependent Materials: In-line: Valox (PBT) submersible: CPVC Electrical Cable: 4.6 m/15 ft, 3-conductor shielded 22 AWG, 100 ft max. Power: 12 to 24 VDC ±10%, regulated for 4 to 20 ma output 5 to 6.5 VDC ±5% regulated recommended, 3 ma max., for digital (S 3 L) output Current output: ph: Fixed 4 to 20 ma, isolated, = 0 to 14 ph (custom scaling available) ORP: Fixed 4 to 20 ma, isolated, = -1000 to 2000 mv (custom scaling available from ± 2000 mv) Max Loop Resistance: 100 Ω max. @ 12 V 325 Ω max. @ 18 V 600 Ω max. @ 24 V Accuracy: ± 32 μa Resolution: ± 5 μa Update Rate: 0.5 seconds Error indication: 3.6 ma Electrical (continued) Update Rate: 0.5 seconds Available Data: Raw mv, ph or ORP, temperature (ph) Error indication: Open input diagnostic Input Impedance, Z: >10 11 Ω Environmental Enclosure: 3-2750-1 & -2: NEMA 4X/IP65 with electrode connected 3-2750-3 & -4: NEMA 6P/IP68 with electrode and watertight conduit and/or extension pipe connected Max. Temperature/Pressure Rating Operating Temperature: Temperature (submersible): 0 C to 85 C (32 F to 185 F) Temperature (in-line): 0 C to 110 C (32 F to 230 F) Storage Temperature: -20 C to 85 C (-4 F to 185 F) Relative Humidity: 0 to 95%, non-condensing (without electrode connected) Shipping Weight 2750-1 & 2: 0.75 kg 1.65 lb 2750-3 & -4: 0.64 kg 1.41 lb Standards and Approvals CE Manufactured under ISO 9001 for Quality and ISO 14001 for Environmental Management Digital (S 3 L) output: Serial ASCII, TTL level 9600 bps Accuracy: ph: ± 0.03 ph @ 25 C (77 F) ORP: ± 2 mv @ 25 C (77 F) Resolution: ph: 0.01 ph ORP: 1 mv Temp.: 0.2 C (32.3 F) Valox is a registered trademark of the General Electric Company www.gfsignet.com 95

2750 Product Selection Guide 1. Choose the Electrode 2724-2726 3-2724-00, -01 2764-2767 Differential 3-2725-60, -61 3-2764-2 3-2726-00, -01 3-2765-1 3-2726-HF-00, -01 3-2766-2 3-2726-LC-00, -01 3-2767-1 2774-2777 3-2774-1 2756 and 2757 Wet-Tap 3-2775-1 3-2756-WT 3-2776-1 3-2756-WTP 3-2777-1 3-2757-WT 3-2757-WTP 2. Determine the mounting style: In-line 2750-1 or -2 2750-3 or -4 2750-1 or -2 2750-3 or -4 2750-1 or -2 2750-3 or -4 2750-1 or -2 -In-line fitting Submersible fitting ¾ reducing tee 2750-3 or -4 and cable conduit (customer supplied) connected to ¾ sensor electronics 1 threaded tee ¾ reducing tee + 3719 Wet-Tap Assembly (Submersible not applicable with Wet-Tap assembly) 3. Junction Boxes 3-8050-1: Use when extending the submersible cable over long distance. 3-8050-2: Use with the submersible 2750-3 or -4 and the in-line 2750-1 for best calibration results with the EasyCal function when using the blind 4 to 20 ma output. 4. Choose the output instrument Digital (S 3 L) 4 to 20 ma OR 8900 Multi-Parameter Controller PLCs or Chart Recorders PLC 96 www.gfsignet.com

Model 2750 Ordering Information 1) Model 2750 requires 12 to 24 VDC to function as a blind 4 to 20 ma output transmitter. 2) Order a 3-2750-2 or any other 2750 with a junction box 3-8050-2 if the EasyCal feature is desired. 3) Conduit and mounting brackets for submersion installation must always be used (customer supplied). 4) The 3-2759 System Tester must be ordered with the adapter cable 3-2759.391 for exclusive use with the 2750. 5) All sensor electronics, preamplifiers and connectors require a DryLoc electrode for full system installation. Ordering Information 3-2750 Sensor Electronics with preamplified signal and Digital (S 3 L) output (for use with the 8900 controller) or 4 to 20 ma output - power supplied to unit dictates output type. -1 In-line Sensor electronics (yellow body) - recommended for 8900 Controller -2 In-line Sensor electronics with EasyCal (yellow body) - recommended for 4 to 20 ma use -3 Submersible Sensor electronics with 4.6 m (15 ft) cable and ¾ in. NPT threads - when 4 to 20 ma is required use the 3-8050-2 junction box with EasyCal -4 Submersible Sensor electronics with 4.6 m (15 ft) cable and ISO 7/1R 3/4 threads - when 4 to 20 ma is required use the 3-8050-2 junction box with EasyCal 3-2750 -2 Example Part Number Mfr. Part No. Code 3-2750-1 159 000 744 3-2750-2 159 000 745 3-2750-3 159 000 746 3-2750-4 159 000 842 Application Tips The EasyCal feature automatically recognises standard 4.0, 7.0, and 10.0 ph buffer or ORP Quinhydrone solutions of 87 and 264 mv and simplifies calibration Frequency of calibration of electrodes is dependent upon the application. Accessories and Replacement Parts Mfr. Part No. Code Description Calibration 3-2700.395 159 001 605 Calibration kit: includes 3 PP cups, cup stand, 1 pint ph 4.01, 1 pint ph 7.00 3822-7115 159 001 606 20 gm bottle Quinhydrone for ORP calibration (must use ph 4.01 and/or ph 7.00 buffer solutions) 3-2759 159 000 762 system tester (adapter cable sold separately) 3-2759.391 159 000 764 2759 adapter cable for use with 2750 DryLoc sensor electronics 3-0700.390 198 864 403 ph buffer kit (1 each 4, 7, 10 ph buffer in powder form, makes 50 ml of each) 3822-7004 159 001 581 ph 4 buffer solution, 1 pint (473 ml) bottle 3822-7007 159 001 582 ph 7 buffer solution, 1 pint (473 ml) bottle 3822-7010 159 001 583 ph 10 buffer solution, 1 pint (473 ml) bottle Mounting 3-8050-1 159 000 753 Universal mount junction box 3-8050-2 159 000 754 Universal mount junction box w/easycal (for submersible applications, use with 3-2750-3/4 where 4 to 20 ma is required) 3-9000.392-1 159 000 839 Liquid tight connector kit, NPT (1 connector) 3-9000.392-2 159 000 841 Liquid tight connector kit, PG 13.5 (1 connector) Other 5523-0322 159 000 761 Sensor cable (per ft), 3-cond. plus shield, 22 AWG, black/red/white (for use with 2750) www.gfsignet.com 97

6 7 8 RELAY 1 4 10 RELAY 2 ph 2 12 0 14 ENTER DryLoc Preamplifiers & Connectors Features In-line integral mount and submersible installation versions For fittings up to 4 in. and wet tap assemblies. In-line 2760 Description The Preamplifiers features the DryLoc connector, providing a robust connection to DryLoc electrodes. The 2760 preamplifier allows any DryLoc electrode to work with ProcessPro and ProPoint instruments. It is also sold as a simple connector for use with other manufacturers instruments that do not require a preamplified signal. Submersible 2760 In-line when electrode has ¾ in. or 1 in. process connection DryLoc Electrodes sold separately. The DryLoc electrode connector system quickly forms a robust assembly for submersible and in-line installations. NEMA 4X junction enclosures are to extend the preamplifier cable to long distances. The 2760 submersible preamplifier can also be used as an In-line preamplifier when used with the ¾ in. or 1 in. threaded sensors including the 2724, 2774 and 2764 series electrodes. The 2760 In-line preamplifier can be used with fittings up to DN100 (4 in.) and wettap assemblies. Automatic temperature compensation Auto configuration for ph or ORP operation Junction boxes for convenient wiring Applications Water/Wastewater Treatment Neutralisation Systems Scrubber Control Effluent Monitoring Surface Finishing Flocculent Coagulation Heavy Metal Removal and Recovery Toxics Destruction Sanitisation Systems Pool & Spa Control Aquatic Animal Life Support Systems System Overview Panel Mount Instrument 5700, 8750 Preamplifier In-Line Installation Pipe, Tank, Wall Mount Transmitter 8750 Universal Adapter Kit (3-8050) Preamplifier Submersible Installation Panel, Pipe, Tank, Wall Mount Instrument 5700 8750 Monitor Pipe extension or conduit with 3/4 in. NPT or ISO 7/1-R 3/4 threads (customer supplied) Wet-Tap Installation Panel Mount Instrument 5700, 8750 Preamplifier with Wet-Tap Electrode 2756, 2757 (each sold separately) Pipe, Tank, Wall Mount Transmitter 8750 Universal Adapter Kit (3-8050) DryLoc Electrodes 2724-2726, 2764-2767, 2774-2777 and Preamplifier 3719 Wet-Tap 2724-2726 DryLoc Electrodes: Use GF Fittings* or 3/4 in. NPT fittings (customer supplied) 2764-2767 and 2774-2777 DryLoc Electrodes: Use 3/4 in. or 1 in. NPT fittings (customer supplied) DryLoc Electrodes 2724-2726, 2764-2767, 2774-2777 GF PP Clamp-On Saddles for 3719 Wet-Tap or GF Tees and Fittings see model 3719 for more info 98 www.gfsignet.com

Dimensions 3-2760-1, -2, -3, -4 31.75mm (1.25 in.) 70.1mm (2.76 in.) 56.6mm (2.23 in.) 89.4mm (3.52 in.) 3-2760-11, -21, -31, -41 101 mm (4.0 in.) 35.0 mm (1.38 in.) 61.0 mm (2.40 in.) 3/4 in. ISO or 3/4 FNPT threads 3/4 in. ISO or 3/4 FNPT threads Specifications General Compatible Electrodes: DryLoc ph and ORP Electrodes Models 2724-2726, 2756-2757 Wet-Tap 2764-2767, 2774-2777 All ph sensors used with the 2760 must have a 3K Temperature sensor Operating Range: ph: 0 to 14 ph ORP: ± 2,000 mv Response Time*: ph: < 6 sec. for 95% of change ORP: application dependent Materials: In-line: Valox (PBT) Submersible: CPVC Electrical Cable: 4.6 m/15 ft, supplied, 120 m/400 ft max 6 cond., foil shield with drain wire, 24 AWG Environmental Enclosure: Submersible: NEMA 6P/IP68 with electrode and watertight conduit and/or extension pipe connected In-line: NEMA 4 with electrode and watertight conduit and/or extension pipe connected Max. Temperature/Pressure Rating Operating Temperature: Temperature (submersible): 0 C to 85 C (32 F to 185 F) Temperature (in-line): 0 C to 110 C (32 F to 230 F) Storage Temperature: -20 C to 85 C (-4 F to 185 F) Relative Humidity: 0 to 95%, non-condensing (without electrode connected) Shipping Weight 0.64 kg 1.41 lb Standards and Approvals CE Manufactured under ISO 9001 for Quality and ISO 14001 for Environmental Management Valox is a registered trademark of the General Electric Company www.gfsignet.com 99

RELAY 1 RELAY 2 ENTER 2760 Product Selection Guide 1. Choose the Electrode 2724-2726 3-2724-10,-11 2764-2767 Differential 3-2725-60, -61 3-2764-1 3-2726-10, -11 3-2765-1 3-2726-HF-10, -11 3-2766-1 3-2726-LC-10, -11 3-2767-1 2774-2777 3-2774 2756 and 2757 Wet-Tap 3-2775 3-2756-WT-1 3-2776 3-2756-WTP-1 3-2777 3-2757-WT 3-2757-WTP 2. Determine the mounting style: In-line 2760-11 or -21 2760-1 or -2 2760-11 or -21 2760-1 or -2 2760-11 or -21 2760-1 or -2 2760-11 or -21 -In-line fitting fitting ¾ reducing tee 1 threaded tee ¾ reducing tee Submersible 2760-1 or -2 and cable conduit (customer supplied) connected to ¾ sensor electronics + 3719 Wet-Tap Assembly (Submersible not applicable with Wet-Tap assembly) 3. Junction Boxes 3-8050-1: Use when extending the submersible cable over long distance. 3-8050-2: Use with the submersible 2760-1 or -2. For simple calibration with the EasyCal function. 4. Choose the instrument 4 6 7 8 ph 10 2 12 0 14 Monitor OR 5700 8750 100 www.gfsignet.com

Model 2760 Ordering Information 1) Conduit and mounting brackets for submersion installation must always be used (customer supplied). 4) The 3-2759 System Tester must be ordered with the adapter cable 3-2759.391 for exclusive use with the 2760. 5) All sensor preamplifiers and connectors require a DryLoc electrode for full system installation. 6) Use Models 2724-2726, 2756-WT, 2757-WT, 2764-2767 and 2774-2777 ph and ORP electrodes with the 2760. Ordering Information Preamplifier and Connector 3-2760 Preamplifier (for use with the 8750 or 5700 instrument) or Connector (for use with other manufacturer s instruments) with 4.6 m (15 ft cable) Preamplifier -1 Preamplifier, with ¾ in. NPT threads and 4.6 m (15 ft) cable -2 Preamplifier, with ¾ in. ISO threads and 4.6 m (15 ft) cable Connectors (for use with other manufacturer s instruments) -3 Connector with 4.6 m (15 ft) cable and ¾ in. NPT threads -4 Connector with 4.6 m (15 ft) cable and ISO 7/1R 3/4 threads Mounting Configurations - Submersible mounting (gray body) 1 In-line mounting (yellow body); use for wet-tap sensors 3-2760 -2 Example Part Number Mfr. Part No. Code 3-2760-1 159 000 939 3-2760-2 159 000 940 3-2760-3 159 000 941 3-2760-4 159 000 942 3-2760-11 159 001 367 3-2760-21 159 001 368 3-2760-31 159 001 369 3-2760-41 159 001 370 Application Tips The EasyCal feature automatically recognises standard 4.0, 7.0, and 10.0 ph buffer or ORP Quinhydrone solutions of 87 and 264 mv and simplifies calibration Frequency of calibration of electrodes is dependent upon the application. Accessories and Replacement Parts Mfr. Part No. Code Description Calibration 3-2759 159 000 762 system tester (adapter cable sold separately) 3-2759.391 159 000 764 2759 adapter cable for use with 2750 and 2760 DryLoc sensor electronics 3-0700.390 198 864 403 ph buffer kit (1 each 4, 7, 10 ph buffer in powder form, makes 50 ml of each) 3822-7004 159 001 581 ph 4 buffer solution, 1 pint (473 ml) bottle 3822-7007 159 001 582 ph 7 buffer solution, 1 pint (473 ml) bottle 3822-7010 159 001 583 ph 10 buffer solution, 1 pint (473 ml) bottle 3-2700.395 159 001 605 Calibration kit: includes 3 PP cups, cup stand, 1 pint ph 4.01, 1 pint ph 7.00) 3822-7115 159 001 606 20 gm bottle Quinhydrone for ORP calibration (must use ph 4.01 and/or ph 7.00 buffer solutions) Mounting 3-8050-1 159 000 753 Universal mount junction box 3-8050-2 159 000 754 Universal mount junction box w/easycal 3-9000.392-1 159 000 839 Liquid tight connector kit, NPT (1 connector) 3-9000.392-2 159 000 841 Liquid tight connector kit, PG 13.5 (1 connector) Other 5523-0624 159 000 636 Cable, 6-cond. plus shield, 24 AWG, black/red/white (for use with 2760, orders must specify length per foot) www.gfsignet.com 101

5700 Monitor Member of the ProPoint Family of Monitors Features Displays ph/temp/mv or ORP/mV EasyCal simplifies routine calibration Simple push-button operation Intuitive software design System Overview Analogue and Digital Display Description The 5700 Monitor is a versatile and intelligent instrument that recognises the type of sensor connected, either ph or ORP, then automatically sets itself for the corresponding display and functionality. Also, during EasyCal operation, the monitor automatically recognises standard buffers/test solutions, thereby shortening and simplifying routine calibration procedures. Two programmable relays and one scaleable 4 to 20 ma output are included, and the four-button keypad arrangement with intuitive software design is very userfriendly. The monitors require 12 to 24 volts ±10%, regulated, AC or DC, and can be used with many electrodes and preamplifiers, or with electrodes from other manufacturers by using the 2721 Preamplifier. Several useful accessories are available, including the optional splashproof rear cover kit. In-Line Sensor Installation Submersible Sensor Installation WetTap Sensor Installation Panel Mount 5700 Instrument Panel Mount 5700 Instrument Panel Mount 5700 Instrument Scaleable 4 to 20 ma output internally powered (active) Two programmable relays Dual proportional control capability Non-volatile memory Versatile low voltage power requirement Applications Water & Wastewater Treatment Neutralisation Scrubber Control Effluent Monitoring Surface Finishing Heavy Metal Removal and Recovery Toxics Destruction Sanitisation Systems Pool & Spa Control Aquatic Animal Life Support Systems Process Control MEASURING EQUIPMENT 77CJ compatible Electrode with Preamplifier 2724-2726, 2764-2767, 2774-2777, 2760 (each sold separately) Pipe extension or conduit with 3/4 in. NPT or ISO 7/1-R 3/4 threads Wet-Tap Electrode 2756, 2757 with Preamplifier 2760 (each sold separately) GF Fittings* *See Fittings Section for more information. compatible Electrode with Preamplifier 2724-2726, 2764-2767, 2774-2777, 2760 (each sold separately) 3719 WetTap GF PP Clamp-On Saddles for 3719 Wet-Tap or GF Tees and Fittings see model 3719 for more info 102 www.gfsignet.com

Dimensions Panel Gasket 91 mm (3.6 in.) 96 mm (3.8 in.) Front View Optional Splashproof Rear Cover #3-5000.395 Mounting Panel Mounting Clamp (2 ea.) Side View 76 mm (3 in.) 96 mm (3.8 in.) 88 mm (3.5 in.) Side View 96 mm (3.8 in.) 88 mm (3.5 in.) Specifications General Operating Range: ph: 0 to 14 ph, optically isolated Temp: -25 C to 120 C (-13 F to 248 F) ORP: -2,000 to +2,000 mv, optically isolated Accuracy: ± 0.2% of scale Display Analogue: Reversible dial: 0 to 14 ph or ±1000 mv Digital: Backlit LCD, 2x16 alphanumeric character Materials Enclosure: ABS Plastic Keypad: Silicone Rubber Panel and case gasket: Neoprene Window: Hard-coated polycarbonate Electrical Power Requirements: 12 to 24 VAC or DC ±10%, regulated recommended, 50 to 60 Hz, 10W max. Current Output: 4 to 20 ma, non-isolated, active, internally powered Electrical (continued) Loop Impedance: 350 Ω max. @ 12V 950 Ω max. @ 24V Accuracy: ± 0.1% Alarm Contacts: Two SPDT relays: 5A @ 30 VDC 5A @ 125 VAC 3A @ 250 VAC max. High/low/pulse programmable with adjustable hysteresis Dual proportional control capability, maximum pulse rate 300 pulses/min. Environmental Operating Temperature: -10 C to 55 C (14 F to 131 F) Relative Humidity: 0 to 95%, non-condensing Enclosure: NEMA 4X/IP65 front Shipping Weight 0.82 kg 1.81 lb Standards and Approvals CE, UL, CUL Manufactured under ISO 9001 for Quality and ISO 14001 for Environmental Management Model 5700 Ordering Information 1) Panel cutout should be 92 x 92mm (3.62 x 3.62 in.) 2) Reversible dials with standard ranges for ph and ORP are included with the instrument 3) An optional splashproof rear cover can be ordered separately if needed. 4) Protective overlays are available for the front panel. 5) Order RC filter kits to protect relays from voltage spikes. 6) To mount the unit onto a wall, use the heavy duty wall mount bracket. Please refer to Wiring, Installation, and Accessories sections for more information. www.gfsignet.com Ordering Information Mfr. Part No. Code Description 3-5700 198 825 003 Monitor Accessories and Replacement Parts Mfr. Part No. Code Description Mounting 3-5000.395 198 840 227 Splashproof rear cover kit 3-5000.399 198 840 224 5 x 5 inch adapter plate to retrofit older installations 3-5000.598 198 840 225 Surface mount bracket (panel mount only) 3-8050.392 159 000 640 ¼ DIN retrofit adapter 3-0000.596 159 000 641 Heavy duty wall mount bracket (panel mount only) Liquid Tight Connectors 3-9000.392 159 000 368 Liquid tight connector kit for rear cover (3 connectors) 3-9000.392-1 159 000 839 Liquid tight connector kit, NPT (1 connector) 3-9000.392-2 159 000 841 Liquid tight connector kit, PG 13.5 (1 connector) Other 3-5000.390 159 000 323 Installation kit 3-5000.397 159 000 326 5000 series window kit 3-5000.525-1 198 840 226 Bezel, 5000 series 3-0700.390 198 864 403 ph buffer kit (1 each 4, 7, 10 ph buffer in powder form, makes 50 ml of each) 3-5000.398 159 000 646 Protective overlay kit (10 pcs) 3-8050.396 159 000 617 RC filter kit (for relay use), 2 per kit 103

8750 Transmitters Member of the ProcessPro Family of Instruments Features Automatic temperature compensation Temperature display in C or F Hold and simulate functions Relay options available Output scaleability Optional Dual output Panel Mount Pipe, Tank, Wall Mount NEMA 4X/IP65 enclosure with selfhealing window Description The 8750 Transmitter is designed for broad application and ease of setup and use. The unit autoconfigures for either ph or ORP use when connected to ph or ORP electrodes. Multiple mounting options allow for installation best suited to your particular application. The EasyCal menu features automatic buffer recognition for mistake-proof ph or ORP electrode calibrations. Intuitive software and the four button keypad arrangement make it easy to access important information such as ph or ORP, mv input, temperature, calibration, relay setup menus and more. EasyCal option available Applications Neutralisation Systems Heavy Metals Recovery Plating Control Scrubber Control Pool and Spa Control Environmental Study Water Treatment Water Quality Monitoring Waste Treatment Disinfection System Overview MEASURING EQUIPMENT 77CJ LEAD FREE Pb RoHS COMPLIANT Panel Mount 8750 Instrument In-Line Sensor Installation Pipe, Tank, Wall Mount 8750 Instrument Submersible Sensor Installation Panel, Pipe, Tank, Wall Mount 8750 Instrument Panel Mount 8750 Instrument Wet-Tap Sensor Installation Pipe, Tank, Wall Mount 8750 Instrument 3-8050 Universal Adapter Kit Pipe extension or conduit with 3/4 in. NPT or ISO 7/1-R 3/4 threads 3-8050 Universal Adapter Kit Preamplifier electrode 2724-2726 2764-2767 2774-2777 Preamplifier electrode 2724-2726 2764-2767 2774-2777 Wet-Tap Electrode 2756, 2757 with Preamplifier 2760 (each sold separately) 3719 Wet-Tap GF Fittings* or customer supplied fittings GF PP Clamp-On Saddles for 3719 Wet-Tap or GF Tees and Fittings see model 3719 for more info *See Fittings Section for more information. 104 www.gfsignet.com