Magnetic inductive flow sensors

Transcription

1 Magnetic inductive flow sensors The magnetic-inductive induq flow sensors of the VMM series are thanks to their robust design suitable for use in harsher ambient conditions. The steel fitting is fully welded and therefore very stable and insensitive to interference. The available nominal diameters from DN 32 to DN 2 cover measurement requirements for medium flow rates of up to 1 m/s. The large selection of high-quality materials provides for numerous application possibilities. Earth electrodes are available as an option. In addition, the VMM is available in both separate and compact design and is generally delivered with a calibration certificate. The electronic display allows customer-specific sensor configuration to meet the particular requirements on site. Due to the principles involved, the inner wall of the device has to be electrically insulating. Since the robust measuring pipes of the VMM are made of stainless steel, they are lined with a non-conductive material. Hard rubber and PTFE are available as lining materials for the VMM. Depending on the process conditions such as medium, pressure and temperature, the most economical lining can therefore be used. The electronic display unit is characterized, among other things, by the following functions: Rapid signal processing with a 16-bit microcontroller Analogue and digital outputs frequency or pulse output, device status, limits and flow direction Empty-pipe detection feature Low-flow suppression Easy menu-driven operation and programming (e.g. measuring range, pulse rate) by the user by means of a two-line alphanumeric display Password protection to prevent unauthorized access Benefits No moving parts No mechanical wear* Free pipe cross-section no additional pressure drop Maintenance-free Fast response (< 1 ms) Minimum inlet section requirements * For aqueous media without solid fractions 14

2 VMM induq Technical data Type VMM32 VMM4 VMM5 VMM65 VMM8 VMM1 VMM125 VMM15 VMM2 Characteristics Nominal diameter DN 32 DN 4 DN 5 DN 65 DN 8 DN 1 DN 125 DN 15 DN 2 Process connection Flange connection in accordance with EN 192-1, JIS B222 1K or ANSI B16.5 Flow range Flow velocity [m/s]...1 Volumetric flow [m³/h] ,2...7, , , , , Factory-scaled measuring range corresponds to ma [m³/h] Accuracy* v = m/s v < 1 m/s additionally Frequency output Analogue output Repeatability Response time Signal output starting from Medium / min. conductivity of medium Medium temperature Hard rubber PTFE Process connections, steel Process connections, stainless steel Ambient temperature Hard rubber PTFE Process connections, steel Process connections, stainless steel Display ±.5 % of reading ±.4 % of reading ±1 mm/s ±.5 % per 1 K ±.1 % per 1 K ±.15 % of reading < 1 ms** > m/s Water and other conductive liquids / 5 µs/cm...9 C C at 4 bar C at 25 bar C at 16 bar Min. -1 C Min. -2 C...8 C C Min. -1 C Min. -2 C C*** Storage and transport temperature C Compressive strength EN192-1 JIS B222 1K ANSI B RF Flow indication Degree of protection PN 4 PN 4 PN 4 PN 16**** PN 4 PN 16 PN bar 19.6 bar (Process connection, steel) 15.9 bar (Process connection, stainless steel) LCD, backlighting IP67 (EN 6529) / NEMA5 PN 16 PN 4 PN 16 PN 4 PN 16 PN 4 PN 1 PN 16 PN 25 PN 4 * Reference conditions: Media temperature C; Ambient temperature C; warm-up period 3 min.; straight pipe lengths; inlet 5 x DN, outlet 2 x DN, regularly centered and grounded ** Depending on the electronics settings *** The readability of the LCD display is restricted below C **** 8 bolt flanges 15

3 Typ VMM32 VMM4 VMM5 VMM65 VMM8 VMM1 VMM125 VMM15 VMM2 Output signals Frequency output signal Configuration Pulse signal or frequency signal selectable Pulse rate (factory-set) [1/m³] Pulse significance Pulse width Frequency Signalform Analogue output Operating range Current limitation Max. burden Short-circuit proof Alarm output Quantity 2 Version Function Switching values Electrical data 1 Pulse/s.1 ms (max. 2 s), adjustable...1 khz Squarewave signal... 2 ma / ma, selectable 21.6 ma 6 Ω Permanent Optocoupler Status output: Preflow, backflow, MIN flow rate, MAX flow rate, alarm (adjustable) U max : 3 V; I max : 6 ma; P max : 1,8 W Electrical connection Cable gland M2 x 1.5 Power supply Current consumption 23 VAC -15 % / +1 %, 5/6 Hz VDC 15 VA Werksprüfschein Works Calibration Certificate 16 Gerät/ Instrument: Durchflussmessgerät Typ/ Flow Sensor Type VMM Artikel- Nr./ Product number VMM25D111KAMA2 Seriennummer/ Serial number /A1 SIKA Auftragsbestätigung/ order confirmation Kalibrierinformation/ Calibration Information: Kalibriermethode/ Calibration Method Kalibriernormal/ Reference meter Kalibrierstand/ Reference Unit Id No Messungenauigkeit Kalibrierstand/ Uncertainty of Reference Unit <.25 % of rate Kalibrierfaktoren/ Meter Factor: ZPH:, CFH: 683, Messergebnisse/ Results: Messwert 1/ Calibration Point 1 Messwert 2/ Calibration Point 2 Messwert 3/ Calibration Point 3 Durchfluss Sollwert zul. Abweichung Fehler Abweichung flow rate reference value Allowable Deviation Actual Deviation m³/h m³/h % %,,,, 1,11 1,1,5,8 5,8 5,8,5,3 2,5 2,5,5, Das Messgerät ist auf Richtigkeit im oben angegebenen Bereich geprüft worden. The Flowmeter has been tested at the calibration test rig within the above mentioned range. Das Kalibrierergebnis ist innerhalb der zulässigen Abweichung. The calibration result is within specified limits. kführbar auf nationale Normale zertifiziert durch he Bundesanstalt (PTB). tional standard

4 Types and materials Compact type Separate type Materials Not in contact with fluid Display housing Casted aluminium Sensor housing Steel Measuring pipe Stainless steel Process connection Steel 1.46 or stainless steel In contact with fluid Electrodes Stainless steel or Hastelloy C276 Measuring pipe lining PTFE or Hard rubber 17

5 Dimensions Separate type (Display) Wall bracket Separate type (Sensor) 18

6 Compact type Dimensions [mm] Process connection Installation length L Sensor Weight EN JIS B222 1K ANSI B16.5 Hard rubber PTFE Tolerance B D H Without protection rings With protection rings DN 32 1¼ / DN 4 1½ / ,5 DN / DN 65 2½ / DN / DN / DN / DN / DN / EN [kg] 19

7 Order code Order example VMM32 A 1 1 KAMA 2 Nominal diameter DN 32 / 1¼ DN 4 / 1½ DN 5 / 2 DN 65 / 2½ DN 8 / 3 DN 1 / 4 DN 125 / 5 DN 15 / 6 DN 2 / 8 Process connection EN PN 1 starting from DN 2 EN PN 16 starting from DN 65 EN PN 25 starting from DN 2 EN PN 4 starting from DN 32 JIS B222 1K ANSI B RF Material process connection Steel 1.46 Stainless steel Lining PTFE Hard rubber Material electrodes Stainless steel Hastelloy C276 Earth electrode Without One Two Type Compact type with display Separate type with display Power supply 23 VAC, 5/6 Hz / 15 VA VDC VMM32 VMM4 VMM5 VMM65 VMM8 VMM1C VMMV3 VMM3L VMM2C A B C D J I KAMA GAMA

8 Accessories Earthing ring VMM Protection rings VMM Earthing ring An earthing ring is used for the electrical reference and earthing of the medium being measured. It is necessary if the pipes are not electrically conductive or lined (plastic or concrete pipes, etc.). The earthing ring must be connected to the provided earthing screw of the sensor. Retrofitting is possible. Material stainless steel Pair of protection rings Protection rings protect the inlet and outlet edges of the sensor against mechanical damage, in particular when abrasive media such as gravel, sand, etc. are concerned. At the same time, they also serve as earthing rings. The protection rings are firmly screwed to the sensor. Material stainless steel Sensor cable set Sensor cable between sensor and display unit (separate design) consisting of magnetic power cable and electrode cable for configuration of M16 x 1.5 screw connection. 111

9 Order code Order example VMMZEW 32 A 1 Type Earthing ring Protection rings (pair) VMMZEW VMMZPR Nominal diameter DN 32 / 1¼ DN 4 / 1½ DN 5 / 2 DN 65 / 2½ DN 8 / 3 DN 1 / 4 DN 125 / 5 DN 15 / 6 DN 2 / C V3 3L 2C Process connection EN JIS B222 1K ANSI B RF E J A Lining PTFE Hard rubber 1 Sensor cable set - length of cable Order code 5 m VMMZSCZ5 1 m VMMZSCZ1 112

10 Stainless steel turbine sensors Series VTR Extra robust, impressively precise SIKA s VTR turbine flow sensor allows you to determine precisely, dependably and easily the flow rates of different liquids, such as water and other low viscosity liquids, under the most severe conditions. The VTR sensor is particularly robust and, due to thewide range of nominal diameters and five different pick-ups, can cope with even the most severe conditions. The characteristic variable is the K-factor (pulses per litre) which is specific to each measuring unit, is determined by calibration and specified on the name plate. A five point calibration report can be supplied on request. 114

11 Measuring principle The VTR sensor consists of the measuring turbine and a pickup mounted on the outside. The liquid flows into the measuring turbine and causes the rotor to move. Due to the characteristic internal diameter the speed of rotation is directly proportional to the flow rate. The moving rotor blades are detected by the pick-up and this is converted into a pulsed signal proportional to the flow rate. For use in Cooling circuits Petrochemicals Chemical industry Water conditioning Plastics and hydraulics 115

12 Stainless steel turbine with flanged or threaded connection Series VTR Type VTR 15 Technical data Accuracy Reproducibility ±.5 % of measured value ±.5 % of measured value Response time < 5 ms up to DN 4 > 5 ms up to DN 3 Process connections Pressure drop Minimum pressure Pressure rating Mediums temperature Max. 15 C All figures specified apply to viscosities up to 5 cst. Higher viscosities on request. Materials Turbine body Flange Rotor Bearing support Rotor bearing Pick-up Flange: DIN, ANSI, others on request thread (up to DN 5): BSP ISO 228 or NPT thread 28 mbar at 1 % measurement range (density 1, viscosity 1 mm²/s) 2 x pressure drop of sensor Threaded connection: 25 bar Flanged connection: corresponding to flange specification Stainless steel AISI 316 Stainless steel AISI 316 Up to VTR 12: stainless steel (18 % Cr, 2 % Mo) VTR : stainless steel (2 % Cr, 2 % Mo) Stainless steel AISI 316 Tungsten carbide sleeve bearing; others (e.g. ball bearings) on request VISPP: stainless steel AISI 314 VISPP-HT: stainless steel AISI 316 VSAPPS / VSAPPSHT: brass nickel-plated 116

13 Dimensions and flow range Thread connection DN 1...DN 5 Flange connection DN 1...DN 3 Type Nominal diameter Flow range Dimensions DN [m³/h] [l/min] A B [mm] C max [mm] D [mm] VTR G½ VTR 115-S G¾ VTR G¾ VTR G¾ VTR G VTR G 1½ VTR G VTR VTR VTR VTR VTR VTR

14 Order codes Thread connection male Order example VS 171VA ISP A3 Type VTR Nominal size / flow range DN 1 / m³/h DN 15 / m³/h DN 15 / m³/h DN 2 / m³/h DN 25 / m³/h DN 4 / m³/h DN 5 / m³/h Sensor Process connection male threaded G male thread G½ male thread G¾ male thread G¾ male thread G¾ male thread G 1 male thread G 1½ male thread G 2 Inductive pick-up VISPP (included in the scope of delivery) Optional pick-up (seperate order) VS 171VA 1572VA 1573VA 274VA 2575VA 476VA 577VA ISP A3 A4 A4 A4 A5 A7 A8 Flange connection Order example VS 171VA ISP G 1 Type VTR Nominal size / flow range DN 1 / m³/h DN 15 / m³/h DN 15 / m³/h DN 2 / m³/h DN 25 / m³/h DN 4 / m³/h DN 5 / m³/h DN 8 / m³/h DN 1 / m³/h DN 15 / m³/h DN 2 / m³/h DN 25 / m³/h DN 3 / m³/h Sensor Inductive pick-up VISPP (included in the scope of delivery) Optional pick-up (seperate order) Process connection DIN flange stainless steel ANSI flange stainless steel PN 6 / #15 PN 16 / #3 PN 25 / #4 PN 4 / # 6 VS 171VA 1572VA 1573VA 274VA 2575VA 476VA 577VA 7578VA 1H79VA HF81VA 2H82VA ZF83VA 3H84VA ISP G I

15 Accessories Pick-ups Types VISPP-HT / VISPP / VSA... Type VISPP Inexpensive, fitted as standard VISPP-HT For high medium temperature VSAPPS* Square wave signal VSAPPSHT* Square wave signal, for high medium temperature Output signal Sinus wave Square wave NPN or PNP to choose Measuring principle Inductive Magnetically biased Hall effect sensor Temperature range C C** C C Power supply Degree of protection IP54 IP67 Electrical connection Amphenol plug connection MS 1 SL VDC Cable socket Inclusive Accessory * Adapter VT114 sold separately ** Notice the max. medium temperature of measuring turbine (15 C). 4-Pin pin plug connection M12 x 1 Connection cables Connection cables Length Order code Connection cable for turbine flow sensor with cable socked M12 x 1, 4-Pin, shielded, sheathing material PUR (T max = 7 C), UL approval 3 m 5 m 1 m XVT 253 XVT 29 XVT 27 Cable socket M12 x 1 angle type, 4-Pin VT

16 Positive displacement flow sensors One pulse per tooth! Gearwheel type flow sensors from SIKA record volume flows of liquids with both high and changing viscosities. The highprecision sensors work according to the displacement principle. The high resolution combined with reliable measurement accuracy make the sensors especially useful for applications involving the measurement of small and very small volumes. In principle, the measurement accuracy is increased for high viscosities. Conversely, the measurement accuracy is lower with a viscosity of less than 1 mm²/s. Due to their construction, gearwheel type flow sensors require a certain lubricity of the fluid beeing measured. Operation with non-lubricating media, e.g. water, is not possible. Functional description A very precisely adjusted gear pair within the casing forms the measuring element. The inflowing medium causes the gear pair to rotate. The rotary motion is scanned by contactless sensors. Since each individual tooth generates a pulse, this results in a very high resolution. Consequently, even the smallest volumes can be measured or dosed precisely. The measurement unit contains two pick-offs that are circumferentially offset by ¼ of a tooth pitch to generate a 2 channel flow-proportional frequency signal. Suitable processing of the signal provides an greater resolution and the option to identify the flow direction. Possible applications Consumption measurement Control of filling operations Dosage of oils and chemicals Flow measurement of paints and varnishes Ratio control of polyol and isocyanate The maximum pressure drop should not exceed 16 bar. This limits the measurement range of high viscosity media (see pressure drop diagrams). Basically, the measurement accuracy increases with increase in viscosity of the media Housing bottom 2 Housing cover 3 Gear wheels 4 Pre-amplifier 2 5 Connection plug 6 Pick-offs 7 Bearing 1 8 Measurement chamber 7 12

17 Series VZ AL-S Technical data Size/type VZ.4 AL-S VZ.2 AL-S VZ 2 AL-S VZ 5 AL-S Measuring range* l/min l/min l/min l/min Viscosity of medium mm²/s mm²/s mm²/s mm²/s Measuring accuracy ±2 % of reading ±1 % of reading ±2.5 % of reading ±1 % of reading Pressure rating Max. 2 bar Max. 16 bar Max. 16 bar Max. 8 bar Pressure peaks Max. 24 bar Max. 2 bar Max. 2 bar Max. 1 bar Medium temperature range C Thread connection G¼ G⅜ G¾ G 1 Weight.5 kg.7 kg 1.9 kg 6 kg Volume per pulse.4 cm³.245 cm³ 2 cm³ cm³ Number of output channels Output signal Signal shape Pulse rate Resolution Indication Electrical connection Power supply Square wave, pulse signal, PNP, pulse duty ratio 1:1 ±15 % 25 pulses/litre.4 ml/pulse Cable socket with one LED for pulse signal Via standard socket V DC reverse polarity protection Square wave, pulse signal, PNP, pulse duty ratio 1:1 ±15 % 482 pulses/litre.245 ml/pulse Cable socket with two LED for pulse signal (two channels) Square wave, pulse signal, PNP, pulse duty ratio 1:1 ±15 % 5 pulses/litre 2 ml/pulse Cable socket with one LED for pulse signal Square wave, pulse signal, PNP, pulse duty ratio 1:1 ±15 % pulses/litre 5.2 ml/pulse Cable socket with one LED for pulse signal Power input.6 W short circuit proof.9 W short circuit proof.6 W short circuit proof.6 W short circuit proof Degree of protection EN 6529 Material Housing IP65 Aluminium AIMgSi F3 (hard coated) Aluminium, gold-color anodised Aluminium AIMgSi F3 (hard coated) Aluminium AIMgSi F3 (hard coated) Gear wheels Stainless steel Steel 16 MnCr5, hardened Steel Steel Bearings Ball bearings Ball bearings stainless steel Sleeve bearings (P1) Seals FKM FKM FKM FKM Order code Ball bearings VZ4ALV31IS VZ2ALV31IS VZ2ALV31IS VZ5ALV31IS * For media with high viscosity the measuring range is reduced. The max. pressure drop shouldn t exceeded 16 bar (see pressure drop diagrams). 121

18 Dimensions G 1/4 11,5 Ø VZ.4 AL-S VZ.2 AL-S G 1 Ø VZ 2 AL-S VZ 5 AL-S 122

19 Typical pressure drop Type VZ AL-S Pressure drop [bar] Viscosity [mm²/s] VZ.2 AL-S Flow rate [l/min] Q Viscosity [mm²/s] Viscosity [mm²/s] Pressure drop [bar] Pressure drop [bar] Flow rate [l/min] Q VZ 5 AL-S,5 1 1,5 2 2,5 3 3,5 4 VZ.4 AL-S Flow rate [l/min] Q Viscosity [mm²/s] Pressure drop [bar] VZ 2 AL-S Flow rate [l/min] Q 123

20 Local display TD 825 Technical data The SIKA TD 825 local display is simply fitted between the connector plug and the cable socket of the SIKA VZ... positive displacement flow sensor. It is programmable via two buttons which are located behind the front panel. It can be set to display either the actual flow rate or the total volume (counter function), as required. The TD 825 is available in three different output signal versions: Pulse output (2-channel, depending on flow sensor) Analogue output (4)...2 ma Two alarm contacts It is also easy to retrofit onto existing flow sensors. To do this, merely remove the amplifier board from the cable socket. TD 825 Signal input Programming Display Power supply Current consumption Pulse signal from flow sensor Via 2 buttons, data retention on power failure Four-digit LED display, red, 7.6 mm high VDC, optional VDC max. 12 ma Ambient temperature...6 C Storage temperature C Output signals Pulse output (2-channel, depending on flow sensor) or analogue output (4)...2 ma or 2 alarm contacts max. 24 VDC / 1 A Housing Aluminium, 6 x 35 x 6 (W x H x D) without plug connector Weight Degree of protection EN 6529 Electrical connection approx. 12 g IP65 Plug connector DIN EN A, 4-pin TD

21 Order code Order example ED825F 6 Outpout signals Pulse output Analogue output (4)...2 ma Two alarm contacts ED825F ED825A ED825R Power supply VDC VDC

22 Oval gear flow meters One pulse per tooth! Measuring principle Oval gear meters are displacement-type volume meters that transport defined incremental volumes in individual measuring chambers. The measuring element consists of two high precision toothed oval gears, which are driven by the flow of the medium and mesh with each other. In this way, a defined volume is transported for each rotation of the pair of oval gears. The number of rotations is a measure of the amount of fluid that has passed through the meter. The rotations are detected by a sensor element. Performance features Positive displacement meter for volumetric flow rate or total flow measurement Applicable for fluids such as lubrication oils, mineral oils, hydraulic oils, fuels, liquified gases and others No inlet or outlet section required High-quality construction for long service life and high reliability Long-term stability High measurement accuracy and repeatability Easy installation 126

23 Configurations / options Pulse output signal NPN open collector, no local display Flow rate or total flow indication by local or remote display Individual calibration Two versions of local displays are available: a battery powered version (lifetime approx. 3 years) or an externally powered version ( VDC) with analogue output (4...2 ma) and pulse output Process connection female thread or flange connection O-ring material FKM, EPDM or FEP Threaded Version Flanged Version 127

24 Sensor Technical data Size VO 15 VO 6 VO 1 VO 2 VO 5 VO 1 VO 5 VO 115 Measuring range [l/min] Oval gears st. steel (V...VA) Oval gears PEEK (V...VP / AP) Process connection Thread Flange (according to DIN EN 192-1) G¼ G½ G½ G¾ DN 15 G 1 G 1 DN 25 G 2 DN 5 G 2 DN 5 Nominal puls rate [1/l] Type VO...VA VO...VP** VO...AP** Accuracy* Repeatability* <.5 % Pressure rating Temperature range ±.5 % of reading Standard C High temperature sensor C Materials*** Up to 4 bar (up to 25 bar with FEP seal) Housing Stainless steel Stainless steel Aluminium Oval gears Stainless steel PEEK PEEK Seal FKM (standard) FKM (standard) FKM (standard) Medium EPDM (option) EPDM (option) EPDM (option) FEP (option) FEP (option) FEP (option) Allowable Viscosity mpa s mpa s Max. particle size µm Electrical data Supply voltage Standard High temperature sensor Electrical connection Signal output Standard High temperature sensor Degree of protection EN 6529 * Test conditions: Viscosity >3 mpa s Media temperature 2 C ** Not availiable for VO 5 and VO 115 *** Other material combinations on request VDC VDC M12 x 1 connector NPN, PNP PNP IP VDC VDC NPN, PNP NPN, PNP 128

25 Sensor with local display Display General description displays Choice of three display models Actual flow rate indication Total flow indication, password protected counter Mass indication (temperature-dependent) Up to two VO sensors can be connected; configurable for differential measurement (Display 2 and 3) Impulse output (Display 2 and 3) Optionally available for wall mounting with bracket (for media temperatures up to 7 C) Type Display 1 Display 2 Display 3 Display Electrical data 8 digit Power supply Battery Battery VDC Power consumption 1 ma, 3V Signal outputs Pulse output Pulse output Analogue ma Degree of protection Temperature range IP65 Media temperature C Ambient temperature C Storage temperature C Type Local (meter mounted) Remote (wall mounting) Display 1 129

26 Dimensions Process connection threaded No display Display 1 Display 2 Display 3 B B B F A F A F A Size VO 15 VO 6 VO 1 VO 2 VO 5 VO 1 VO 5 VO 115 A [mm] C [mm] B max *, D [mm] Installation [mm] F / Process connection G¼ G½ G½ G¾ G 1 G 1 G 2 G 2 * Depends on sensor Process connection flanged No display Display 1 Display 2 Display 3 B C D A A A Size VO 2 VO 1 VO 5 VO 115 A / Installation [mm] C [mm] B max *, D [mm] E [mm] F / Process connection DN 15 DN 25 DN 5 DN 5 * Depends on sensor F E C 13

27 Typical pressure drop Viscosity [mm²/s] Viscosity [mm²/s] Viscosity [mm²/s] VO 15,4 VO 6 1, VO 1 1, 35 Pressure drop [bar],3,2,1 1 Pressure drop [bar],75,5, Pressure drop [bar],75,5, ,2,6 1,4,8 Flow rate [l/min] Q Flow rate [l/min] Q Flow rate [l/min] Q VO 2 1, Viscosity [mm²/s] 25 1 VO 5 1, Viscosity [mm²/s] VO 1 1, Viscosity [mm²/s] Pressure drop [bar],75,5,25 1 Pressure drop [bar],75,5, ,9 Pressure drop [bar],75,5, , Flow rate [l/min] Q Flow rate [l/min] Q Flow rate [l/min] Q Viscosity [mm²/s] Viscosity [mm²/s] VO 5 1, VO 115 1, Pressure drop [bar],75,5, ,9 Pressure drop [bar],75,5,25 1 6, Flow rate [l/min] Q Flow rate [l/min] Q

28 Order code Order example VO 1 VA P N I1K Type Oval gear meters, series VO VO Size Process connection 15 G¼ female 6 G½ female 1 G½ female 2 G¾ female 5 G 1 female 1 G 1 female 5 G 2 female 115 G 2 female 2 DN 15 flange according to DIN EN DN 25 flange according to DIN EN DN 5 flange according to DIN EN DN 5 flange according to DIN EN A 2A 5A A 1 5 1l VA* VA* V* V* I1K I3K I3K I4K I5K I5K I8K I8K F4K F4K F4K F4K Materials Body Stainless steel Stainless steel Aluminium O-rings Oval gears Stainless steel PEEK (PET for VO5 and VO115) PEEK (PET for VO5 and VO115) VA VP AP FEP FKM EPDM P V E Sensor pulse output without display NPN PNP PNP (high temperature) N P H Sensor with display Display 1 Battery powered, local display D Display 2 Battery powered, local display and pulse Battery powered, remote display and pulse C B Display 3 Local Display, pulse and analogue output (4...2 ma) Remote display, pulse and analogue output (4...2 ma) T A * No further options available 132

29 Accessories Accessory part Length Order code Connection cable with 4-pin cable socket M12 x 1, angle type molded lead, sheathing material PUR, shielded, (T max = 8 C) - UL-approval 3 m 5 m 1 m XVT 253 XVT 29 XVT 27 4 pin cable socket M12x1 angle type, unassembled VT V lithium battery for Display 1 and Display 2 VO