Technical Information Retractable plastic process assembly with ball valve for ph and ORP electrodes pplication hemical dustry Wastewater / dustrial water Power plants Refuse cerators The P 474 holder assembly is well suited to applications which require the save separation from the process durg the service step and for media which have a tendency to stick at the electrode holder. Your benefits Safety: Safe and reliable process termation possible under nearly all conditions Only plastics (PP, PVDF, PEEK) contact with medium "Heavy duty version" for high temperature and high pressure applications (up to 145 psi / 10 bar) omfortable operation: ssembly service ongog process: total disassembly of assembly body possible with closed ball valve (e.g. for exchangg sealg rgs, electrode holder etc.) Various immersion depths (tank/pipe stallation) Sealg water to shield off rse chamber utomation even for difficult processes: Fully-automatic calibration and cleang conjunction with Topcal S P300 Easy stallation: Version with pneumatic ball valve drive is complete with attached air les TI345/24/ae/03.05
Prciple Limit position switches # Warng! Function and system design The "Measure" and "Service" operatg status can be changed the followg ways: Manually Pneumatically Pneumatically via Topcal S P300 or Topclean S P30 with optional PR40 rsg block ll versions possible with limit position switch. Prciple sequence when movg the retractable assembly from "Service" to "Measure" Open ball valve Move assembly from "Measure" to "Service" Move assembly lose ball valve In the "Service" status (sensor moved back to the assembly), the ball valve seals the assembly off from the process. This means that cleang and calibration can take place and electrodes can be changed with terruptg the process. The rse chamber and the rse connections of the assemblies are open contact with the medium the measurg position, or at least when movg, and are thus exposed to the process pressure. For this reason, the let and let of the rse chamber must be protected by valves. These valves are available from Endress+Hauser as accessories (see product structure, "dditional equipment"). These valves close automatically the pneumatic version. The pneumatic limit position switches serve as control elements and determe the sequence of the dividual steps. The followg types of limit position switches are available dependg on the order version (product structure, "ssembly operation, ball valve"): "Pneumatic limit position switch" version: 4 pneumatic switches (type, see "Mechanical construction") "Electric limit position switch" version: 3 pneumatic and 2 ductive switches (types, see "Mechanical construction") 2 Endress+Hauser
Function S2 M3 S2 M3 S1 S1 M4 M4 D S4 D S4 S3 S3 M2 M1 Fig. 1: Pneumatic limit position switches a0002747 M2 Electrical limit position switches M1 S5 a0002750 M1 M2 M3 M4 ssembly cylder Pneumatic connection block Measurg: Pneumatics "Open ball valve" Limit position switch "all valve open" Pneumatics "ssembly Measurg" Limit position switch "ssembly Measurg" D S1 S2 S3 S4 S5 all valve drive Rsg put / put Service: Pneumatics "ssembly Service" Limit position switch "ssembly Service" Pneumatics "lose ball valve" Limit position switch (pneu.) "all valve closed" Limit position switch (el.) "all valve closed" Endress+Hauser 3
ssembly movg prciple Movg from "Service" position to "Measure" position D* M3 S2 D* M3 S2 S1 M4 S1 Topcal/ Topclean M4 5 Topcal/ Topclean Topcal/ Topclean 5 2 2 M2 M1 S3 S4 M2 M1 S3 S4 * optional * optional S5 Fig. 2: 5 2 a0002754 Move to "Measurg" position, version with pneumatic limit position switches Pneumatic put, limit position switch Pneumatic put, limit position switch Feedback signal "ssembly measurg" ompressed air put "Start measurg" D Fig. 3: 1. ompressed air is provided at position M1 (pneumatic "Open ball valve"). t the same time, compressed air is applied to M2 (limit position switch "all valve open"). The ball valve () opens. The rse chamber let valve (D) must be closed. 2. When the ball valve is completely open, the limit position switch M2 forwards compressed air to the pneumatics of the pressure cylder, put "ssembly measurg" (M3) and simultaneously to the limit position switch "ssembly measurg" (M4). The electrode holder moves of the assembly to the medium. 3. Once the limit position is reached, the limit position switch M4 sends a signal (5, "ssembly measurg" feedback signal) to the transmitter / DS or to Topcal S / Topclean S. a0002757 Move to "Measurg" position, version with electric limit position switches ssembly cylder Pneumatics connection block all valve drive Outlet safety seal for rse chamber 4 Endress+Hauser
Movg from "Measure" position to "Service" position D* M3 S2 D* M3 S2 S1 M4 S1 M4 Topcal/ Topclean Topcal/ Topclean 6 3 3 * optional Fig. 4: 6 3 M2 M1 S3 Move to "Service" position, version with pneumatic limit position switches Pneumatic put, limit position switch Pneumatic put, limit position switch Feedback signal "ssembly service" ompressed air put "Start service" S4 a0002758 D * optional Fig. 5: M2 M1 S3 S5 Move to "Service" position, version with electric limit position switches ssembly cylder Pneumatics connection block all valve drive Outlet safety seal for rse chamber Topcal/ Topclean 6 S4 a0002759 1. ompressed air is simultaneously provided at the pneumatics of the pressure cylder, put "ssembly service" (S1) and at the limit position switch "ssembly service" (S2). The electrode holder moves from the medium to the assembly. 2. When the limit position is reached, the limit position switch S2 forwards pressure to position S3 (close ball valve) and position S4 (limit position switch "all valve closed") simultaneously. The ball valve () closes. 3. Once the ball valve is completely closed, a signal (6, "ssembly service" feedback signal) is sent from the limit position switch S4 (or the limit position switch S5 case of the version with electric limit position switches) to the transmitter / DS or to Topcal S / Topclean S. t the same time, pressure is applied to the rse chamber let valve (D). Valve D opens as long as the pressure is applied. ny drop pressure causes this valve to close. Endress+Hauser 5
ENDRESS+HUSER MYOM S PM 153 Messen T Temperatur 25.0 Wahl MES L DIG? PRM Hold us PG 300 Measurg system 1 2 9 Endress+Hauser 7 6 3 10 11 12 8 5 4 Fig. 6: a b c Fully automatic measurg system (example) 13 a0002725 For formation on function and connection of the pneumatics and the limit position switches to the assembly, please refer to the related chapters of the Operatg Instructions. 1 7 8 leanfit P assembly Special measurg cable, e.g. PK9, PK12 PR40 rse block (optional) Topcal S P300: 1 2 Mycom S PM153 transmitter 3 PG300 control unit 4 Vessels for cleang agents and buffer solutions 5 Multi hose 6 Supply / control cable a b c Electric le ompressed air le Water / cleang agent / buffer To be supplied by customer: 9 Power supply for Mycom S PM153 10 Power supply for PG300 11 ompressed air 12 Water supply 13 Steam / water / cleang agent (optional) 1) Fully automatic calibration and cleang system 6 Endress+Hauser
Installation Installation structions Glass electrode: Installation angle of at least 15 from the horizontal ISFET ph-sensor Tophit: No restrictions, recommended 0 to 180 15 15 Fig. 7: Permitted orientations dependg on the sensor used a0002775 Pneumatic connections for automatic operation " aution! " aution! For all assemblies with staless steel pressure cylders, we recommend to use a flanged version when stallg with cled orientation. Otherwise, the weight of the assembly could affect the safety of the process connection. void a siphon effect a at the rse chamber let when stallg with cled orientation. The let to the rse chamber must be from below. Requirements: air pressure of 58 to 116 psi (4 to 8 bar) air must be filtered (40 µm) and be free of water and oil no contuous air consumption mimum nomal diameter of the air les: 0.16 ches (4 mm). There must be a pressure-reducg valve upstream if the air pressure can crease to above 116 psi (8 bar) (cludg any short pressure surges). We recommend you also use a pneumatic throttle for lower pressures. This results a smoother assembly operation. Endress+Hauser offers such a throttle as an accessory (see chapter "ccessories"). Environment mbient temperature range mbient temperature not below 32 F (0 ). With an optional let/let safety seal, the ambient temperature may not exceed 122 F (50 ). a) Siphon effect: le emptied by vacuum Endress+Hauser 7
Pressure Temperature " aution! Process P pressure cylder: Staless steel pressure cylder: ("Heavy duty version") Pneumatic let safety seal: Manual let safety seal: The process pressure may not exceed 58 psi (4 bar) with manually actuated assemblies! See pressure-temperature diagram. max. 87 psi (6 bar) max. 145 psi (10 bar) contuous operation: 145 psi (10 bar) / 212 F (100 ) short time (max. 1 h): 72.5 psi (5 bar) / 266 F (130 ) 145 psi (10 bar) / 68 F (20 ), 29 psi (2 bar) / 266 F (130 ) Pressure-temperature diagram 87 p [psi] 140 176 T [ F] 6 145 116 p [psi] 68 140 212 266 10 8 T [ F] 58 4 p [bar] 87 6 p [bar] 29 2 58 4 60 80 T [ ] 29 2 Fig. 8: a0002798-en Pressure-temperature diagram P474 standard version (P pressure cylder) Electrode holder + ball valve PP Electrode holder PEEK/PVDF, ball valve PVDF Fig. 9: 20 60 100 130 T [ ] a0002799-en Pressure-temperature diagram P474 "Heavy duty version" (V pressure cylder) Electrode holder + ball valve PP Electrode holder PEEK/PVDF, ball valve PVDF Flow velocity [ft/s] 6 68 140 266 2 T [ F] 1.5 0.3 Fig. 10: Flow velocity dependance from temperature P Standard version V Heavy duty version P V 20 60 80 130 T [ ] 1 0.1 [m/s] a0002800-en! Note! flow of 6 ft/s (2 m/s) should not be exceeded as otherwise measurable effects (potential) can develop at the electrode. 8 Endress+Hauser
Mechanical construction Design, dimensions Inch (mm) Inch (mm) : 23.2 (590) : 31.1 (790) Ø 2.99 (76) : 34.1 / 865 : 41.9 / 1065 4.92 (125) 15.6 (395) 6.50 (8.66 **) 165 (220**) 10.6 (270) 2.17 (55) 2.56 (65) 0.71 2.17 (18) (55) 8.15 / 207 (2.80 / 71) 0.98 (25) 0.28 (7) Ø 0.75 (19) a0002777-en Fig. 11: ssembly version: pneumatic, short, for Kl sensors, thread adapter nut Thread adapter nut connections are only available with short versions! ** version with electric limit position switches Fig. 12: ssembly version: manual, long, for gel sensors, flange brackets: short version Length when extended Required mountg clearance a0002776-en Process connection D G/H Inch (mm) 4.92 (125) Rd 78x1/6 4.76 (121) 6.50 (165) 6.0 (152) Fig. 13: Process connections P474 (dimensions brackets: NSI flange) D Thread adapter nut DN 50 (for flow assembly P240, short version only!) G/H Flange NSI 2" / 150 lbs (DN 50 / PN 16 flange) a0002778-en Endress+Hauser 9
Fitted sensors Short version Long version ph glass electrodes, Gel 225 mm (8.9 ches) ph glass electrodes, Kl 425 mm (16.7 ches) ph ISFET sensors, Gel, 225 mm (8.9 ches) ph ISFET sensors, Kl, 425 mm (16.7 ches) ph glass electrodes, Gel, 360 mm (14.2 ches) ph ISFET sensors, Gel, 360 mm (14.2 ches) Weight 6.6 to 17.6 lb (3 to 8 kg), dependg on the pressure cylder material, the process connection, the drive and additional equipment, see product structure. Materials In contact with medium: Seals Electrode holder all valve Inlet safety seal Outlet safety seal Rse connection socket Not contact with medium: Pressure cylder Process flange 1 El. limit position switch EPDM / FPM / perfluoroelastomer PP / PEEK / PVDF PP / PVDF PVDF, PTFE, Viton, Hastelloy 4 PVDF PVDF P / staless steel ISI 316 L staless steel ISI 316 L fore-part PT, cable PV 1) for "Heavy duty" assembly version Rse fittgs Limit position switches 2 x G¼ (ternal) or 2 x NPT ¼" (ternal) Pneumatic: Electric: 3/2 way valve ductive (NMUR type) (2) 1/N L+ 2/U L (1)! Note! Inlet and let safety seal Fig. 14: Limit position switches, left: pneumatic (1 = compressed air let, 2 = compressed air let) right: electric (NMUR) The position of the put resp. the put may be different from the figure. Please, refer to the marks at the limit position switch: "1" is the put (), "2" is the put (). Optionally the assembly is supplied with a non-return valve on the let side of the rse chamber (let safety seal) and an let valve (pneumatic let safety seal) resp. a ball valve (manual let safety seal, see product structure). a0002727 5.35 (136) 3.54 (90) 4.88 (124) " aution! Fig. 15: Inlet / let safety seals for rse chamber Pneumatic let safety seal Manual let safety seal Non-return valve (let safety seal) Inch (mm) n let safety seal is defitely required if the rse chamber does not rema sealed with the dra plug a. a0002734-en a) also applies "Measure" position 10 Endress+Hauser
Inlet safety seal (optional) The non-return valve prevents medium from penetratg from the rse chamber to the rse water let. Pneumatic let safety seal (optional) 1 5 2 a 3 b 4 Fig. 16: 1 2 3 4 Functional diagram of the pneumatic valve on the let side of the rse chamber : Valve closed (no connection between rse water and rse chamber) : Valve open (rse water can enter rse chamber) ompression sprg ompressed air put Inlet from the rse chamber let Rse connection socket a 5 a b Rse water let Rse water ompressed air a a0002735 Scraper rg " aution! Manual let safety seal (optional) The manual safety seal is a ball valve made of PVDF. Must be operated manually. Optionally, the assembly is supplied with a molded seal on the process side of the ball valve. This seal has a scraper function. This is especially recommended the followg cases: If the rse chamber, otherwise open to the process, should be protected durg operation. If material stickg to the electrode holder (caused by the medium) a should be scraped off when movg to service mode. The rse chamber and the ternal volume of the ball valve are always filled with medium. t least the short period between openg the ball valve and movg the electrode holder of the service position there is open contact to the medium. In that period, the full process pressure acts on the rse connections. Test reports ertificates and approvals Test certificate 3.1 acc. to EN 10204 on demand. Scope of delivery Orderg formation The scope of delivery comprises: leanfit assembly (ordered version) Operatg Instructions (English). a) fibres, lime etc. Endress+Hauser 11
Product structure ssembly drive, ball valve ssembly + ball valve: manual (convertable to pneumatic) ssembly: pneumatic, ball valve: manual, with limit position switches (retrofittable) ssembly: pneumatic, ball valve: manual, with pneumatic limit position switches D ssembly: pneumatic, ball valve: manual, with electric limit position switches (Ex and Non-Ex) E ssembly + ball valve: pneumatic, with pneumatic limit position switches F ssembly + ball valve: pneumatic, with electric limit position switches (Ex and Non-Ex) Y Special version acc. to customer specification ssembly version 1 Standard version: max. 176 F (80 ), max. 87 psi (6 bar), with moulded seal (P cylder) 2 Heavy duty version: max. 266 F (130 ), max. 145 psi (10 bar), with moulded seal (SS cylder) 3 Standard version: max. 176 F (80 ), max. 87 psi (6 bar), with moulded seal, i.e. the rse chamber is not sealed off the medium! (P cylder) 4 Heavy duty version: max. 266 F (130 ), max. 145 psi (10 bar), with moulded seal, i.e. the rse chamber is not sealed off the medium! (SS cylder) 9 Special version acc. to customer specification Electrode type For gel electrodes and ph ISFET sensors with Pg 13.5 For liquid Kl electrodes and ISFET sensors with Pg 13.5 and hose connection head (type ESS) Y Special version acc. to customer specification Immersion depth 1 Short version up to 2.8" (71 mm) with P cylder (possible sensor lengths: type = 8.9" (225 mm), type = 16.7" (425 mm)) ssembly versions 1 and 3 only! 2 Short version up to 2.8" (71 mm) with staless steel ISI 316L cylder (possible sensor lengths: type = 8.9" (225 mm), type = 16.7" (425 mm)) ssembly versions 2 and 4 only! 3 Long version up to 8.15" (207 mm) with P cylder (possible sensor lengths: type = 14.2" (360 mm)) ssembly versions 1 and 3 only! 4 Long version up to 8.15" (207 mm) with staless steel ISI 316L cylder (possible sensor lengths: type = 14.2" (360 mm)) ssembly versions 2 and 4 only! 9 Special version acc. to customer specification ssembly material ( contact with medium) Sensor holder: PP, ball valve: PP (max. 176 F (80 )) Sensor holder: PEEK, ball valve: PVDF (max. 266 F (130 )) Sensor holder: PVDF, ball valve: PVDF (max. 266 F (130 )) Y Special version acc. to customers specification Seal material ( contact with medium) 1 EPDM (for food applications preferred) 2 FPM (Viton, for process applications preferred) 3 Perfluoroelastomer 9 Special version acc. to customer specification Process connection D Thread adapter nut DN 50 (for flow assembly P240), immersion depth 1,2 only G Flange DN 50, PN 16 H Flange NSI 2", 150 lbs Y Special version acc. to customer specification Optional equipment 3 With pneumatic let/let safety seal (2 x G ¼ ternal thread /PVDF safety plug) 4 With pneumatic let/let safety seal (2 x NPT ¼" ternal thread / PVDF safety plug) 5 With manual let/let safety seal (2 x G ¼ ternal thread / PVDF safety plug) 6 With manual let/let safety seal (2 x NPT ¼" ternal thread / PVDF safety plug) 7 With rse connection sockets, 2 x G ¼ ternal thread (version 1, 2 only!) (with PVDF safety plug) 8 With rse connection sockets 2 x NPT ¼" ternal thread (version 1, 2 only!) (with PVDF safety plug) 9 Special version acc. to customer specification P474- complete order code 12 Endress+Hauser
Water filter and pressure reducer Rse connection adapter Flow assembly! Note! ccessories In the followg sections, you fd the accessories available at the time of issue of this documentation. For formation on accessories that are not listed here, please contact your responsible service. Filter set P300 Water filter (dirt trap) 100 µm, complete, cl. angle bracket; order no. 51511336 Pressure reducer kit complete, cl. manometer and angle bracket; order no. 51505755 Rse connection adapter PR40 for connectg 2 or 4 different media. Order acc. to product structure, see Technical Information (TI342/07/en). Flow vessel P240 (product structure, see below) see Technical Information (TI179/24/ae) Fig. 17: Flow vessel P240 (horizontal flow version, with thread adapter nut DN 50) a0002794 Material 20 PVDF (thread adapter nut DN 50) (flow vessel only for P474) Flow direction Vessel, horizontal flow Vessel with let below Process connection Weldg socket for DN 25 pipe connection Flange DN 25 PN 16 Flange NSI 1" 150 lbs D Flange JIS 10K 25 E Threaded connection NPT ½" ternal thread Seal material 1 EPDM 2 FPM (Viton ) 3 hemraz dditional equipment 10 asic version 30 With test certificate 3.1 to EN 10204 P240- complete order code Endress+Hauser 13
Hose connections for rse chamber Limit position switches Pneumatic throttle Inlet / let safety seal Sensors Hose connection set, for leanfit assemblies, PVDF, G ¼, D12 order no. 51511724 Hose connection set, for leanfit assemblies, staless steel ISI 316L, NPT ¼", D12 order no. 51511725 Hose connection set, for leanfit assemblies, PVDF, NPT ¼", D12 order no. 51511726 Hose connection set, for leanfit assemblies, staless steel ISI 316L, NPT ¼", D16 order no. 51511722 Hose connection set, for leanfit assemblies, PVDF, NPT ¼", D16 order no. 51511723 Hose connection set, for leanfit assemblies, staless steel ISI 316L, G ¼, D16 order no. 51511590 Hose connection set, for leanfit assemblies, PVDF, G ¼, D16 order no. 51511591 Set of pneumatic limit position switches (2 pieces); order no. 51502874 Set of electric limit position switches, Ex and Non-Ex (2 pieces); order no. 51502873 Pneumatic throttle for the reduction of the assembly movg speed, order no. 51511990 Pneumatic let safety seal for rse chamber let: G ¼, order no. 51511929 NPT ¼", order no. 51511934 Manual let safety seal for rse chamber let, G ¼, order no. 51511937 NPT ¼", order no. 51511938 Non-return valve (let safety seal) for rse chamber let, G ¼, order no. 51511939 NPT ¼", order no. 51511940 Glass electrodes Orbist PS11/PS11D ph electrode for process applications, with PTFE diaphragm, Memosens technology as option; Orderg acc. to product structure, see Technical Information (TI028/24/ae) Orbist PS12 ORP electrode for process applications, with PTFE diaphragm; Orderg acc. to product structure, see Technical Information (TI367/07/en) eraliquid PS41 ph electrode with ceramics diaphragm and Kl liquid electrolyte; Orderg acc. to product structure, see Technical Information (TI079/24/ae) eraliquid PS42 ORP electrode with ceramics diaphragm and Kl liquid electrolyte; Orderg acc. to product structure, see Technical Information (TI079/24/ae) eragel PS71/PS71D ph electrode with double chamber reference system and tegrated bridge electrolyte, Memosens technology as option; Orderg acc. to product structure, see Technical Information (TI245/24/ae) eragel PS72 ORP electrode with double chamber reference system and tegrated bridge electrolyte; Orderg acc. to product structure, see Technical Information (TI374/24/ae) Orbipore PS91/PS91D ph electrode with open aperture for media with high dirt load, Memosens technology as option; Orderg acc. to product structure, see Technical Information (TI375/24/ae) 14 Endress+Hauser
ISFET sensors Tophit PS471 Sterilisable and autoclavable ISFET sensor for food and pharmaceuticals, process technology, water treatment and biotechnology; Orderg acc. to product structure, see Technical Information (TI283/24/ae) Tophit PS441 Sterilisable ISFET sensor for media with low conductivity, with liquid Kl electrolyte; Orderg acc. to product structure, see Technical Information (TI352/24/ae) Tophit PS491 ISFET sensor with open aperture for media with high dirt load; Orderg acc. to product structure, see Technical Information (TI377/24/ae) uffer solutions ph Technical buffer solutions, accuracy 0.02 ph, acc. to NIST/DIN ph 4.0 red, 100 ml (3 oz), order no. PY 2-0 ph 4.0 red, 1000 ml (1 qt), order no. PY 2-1 ph 7.0 green, 100 ml (3 oz), order no. PY 2-2 ph 7.0 green, 1000 ml (1 qt), order no. PY 2-3 Technical buffer solutions for sgle use, accuracy 0.02 ph, acc. to NIST/DIN ph 4.0 20 x 20 ml (0.64 oz), order no. PY 2-D ph 7.0 20 x 20 ml (0.64 oz), order no. PY 2-E ORP Technical buffer solutions for redox electrodes +225 mv, ph 7, 100 ml (3 oz); order no. PY 3-0 +468 mv, ph 0, 100 ml (3 oz); order no. PY 3-1 ables Transmitters Measurg, cleang and calibration systems PK9 special measurg cable For sensors with TOP68 plug- head, for high-temperature and high-pressure applications, IP 68 Orderg acc. to product structure, see Technical Information (TI118/07/en) PK1 special measurg cable For ph/redox electrodes with GS plug- head Orderg acc. to product structure, see Technical Information (TI118/07/en) PK12 special measurg cable For ph/redox glass electrodes and ISFET sensors with TOP68 plug- head Orderg acc. to product structure, see Technical Information (TI118/07/en) YK10 Memosens data cable For digital ph sensors with Memosens technology (PSxxD) Orderg accordg to product structure, see Technical Information (TI376/07/en) Liquisys M PM223/253 Transmitter for ph and ORP, field or panel-mounted housg, Hart or PROFIUS available, Orderg acc. to product structure, see Technical Information (TI194/24/ae) Mycom S PM153 Transmitter for ph and ORP, one or two channel version, Ex or Non-Ex, Hart or PROFIUS available, Orderg acc. to product structure, see Technical Information (TI233/24/ae) Topcal S P300 Fully automatic measurg, cleang and calibration system; Ex or Non-Ex, -situ cleang and calibration, automatic sensor monitorg Orderg acc. to product structure, see Technical Information (TI236/24/ae) Topclean S P30 Fully automatic measurg and cleang system; Ex or Non-Ex, -situ cleang, automatic sensor monitorg Orderg acc. to product structure, see Technical Information (TI235/24/ae) Endress+Hauser 15
United States Endress+Hauser, Inc. 2350 Endress Place Greenwood, IN 46143 Tel. 317-535-7138 Sales 888-ENDRESS Service 800-642-8737 fax 317-535-8498 quiry@us.endress.com www.us.endress.com anada Endress+Hauser anada 1075 Sutton Drive urlgton, ON L7L 5Z8 Tel. 905-681-9292 800-668-3199 Fax 905-681-9444 www.ca.endress.com Mexico Endress+Hauser Paseo del Pedregal No. 610 ol. Jardes del Pedregal 01900, Mexico D.F. MEXIO Tel. 525-568-2405 Fax. 525-568-7459 TI345/24/ae/03.05 2005 Endress+Hauser, Inc.