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WIKA · Pressure measurement · Family DPT

Electronic differential pressure transmitter

In primary and secondary circuits
Output
4-20 mA with HART · 4-20mA
Accuracy
See individual transmitter data sheets (IPT-2x
Protection
IP65
NAMUR NE21NAMUR NE43NAMUR NE53NAMUR NE1073.1 inspection certificate2.2 test reportDAkkS calibration certificate
Price
On request
Depends on configuration
Request a quote
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Description

In the process industry, differential pressure measurement using primary and secondary circuits has several advantages over conventional differential pressure methods. The measuring locations, which are usually several metres apart, are connected via a flexible and easily routed cable. This eliminates the need for capillaries, which are complex to install and susceptible to temperature changes.

Special features

  • Simple, uncomplicated installation
  • Mounting possible without diaphragm seal
  • Elimination of capillaries, that can easily kink
  • For applications to SIL 2 (SIL 3)
  • Can be combined with two different designs of transmitters from model IPT-2x and/or model CPT-2x
Identification
ModelDPT-EL
Product familyDPT
SubcategoryDifferential pressure transmitter
Accuracy
Accuracy classSee individual transmitter data sheets (IPT-2x, CPT-2x)
Safety integrity level (SIL)SIL 2 (option), up to SIL 3 in multi-channel redundant operation
Process conditions
Process connection
G 1/2 flushG 1 flushG 1 1/2 flushG 1 hygienic flush
Electrical characteristics
Output signal4-20 mA with HART · 4-20mA · FOUNDATION™ Fieldbus · FOUNDATION Fieldbus · PROFIBUS PA · PROFIBUS ® PA
Power supplyDC 12...35 V (non-Ex), DC 12...30 V (Ex ia)
Electrical connection4-core spring-clip terminals
Materials
Case materialPBT, polyester, Stainless steel 316L, Die-casting AlSi10Mg, powder-coated on PE basis, Die-casting AlSi10Mg, powder-coated
Operating environment
Ambient temperature−40…+85 °C
IP ratingIP65
Certifications and approvals
Certifications
NAMUR NE21NAMUR NE43NAMUR NE53NAMUR NE1073.1 inspection certificate2.2 test reportDAkkS calibration certificateTest certificate for measurement accuracy
Additional details
Datasheet languagesEN, DE
Tables from datasheet
ModelDescription
Models IPT-20 and IPT-21Process transmitter with metal measuring cell with open pressure port or with flush process connection
Models CPT-20 and CPT-21Process transmitter with ceramic measuring cell with open pressure port or with flush process connection
Connecting cable between primary and secondary instrument
Mechanical data
ConstructionWires, strain relief, braided screen, metal foil, sheath
Standard length5 m[16.4 ft]
Max. length25 m[82.02 ft]
Min. bending radius (at 25 °C [77 °F])25 mm[0.985 in]
Diameter■ Approx. 8 mm[0.315 in] ■ Approx. 6 mm[0.236 in]
MaterialPE, PUR
ColourBlack
Electrical data
Wire cross-section0.34 mm² (AWG 22)
Wire resistance< 0.05 Ω/m [0.015 Ω/ft]
Output signal
Signal types■ 4 ...20mA ■ 4 ... 20 mAwith a superimposed HART ® communication signal (option: SIL qualification) ■ HART ® specification: 7.3 ■ FOUNDATION™ Fieldbus ■ PROFIBUS ® PA
Load in Ω(U B - U Bmin ) / 0.022 A
Damping0 ... 999 s, adjustable After the set damping time the instrument outputs 63 %of the applied pressure as output signal.
Step response time< 80 ms (= dead time < 25 ms + rise time 10 ... 90 %<55ms)
Signal typeBacklighting
InactiveActive
4 ... 20 mADC 12 ...35VDC 16 ...35V
4 ... 20 mA with a superimposed HART ® communication signalDC 12 ...35VDC 16 ...35V
FOUNDATION™ FieldbusDC 12 ...32VDC 16 ...32V
PROFIBUS ® PADC 12 ...32VDC 16 ...32V
View all (8)
Signal typeBacklighting
InactiveActive
4 ... 20 mADC 12 ...30VDC 16 ...30V
4 ... 20 mA with a superimposed HART ® communication signalDC 12 ...30VDC 16 ...30V
FOUNDATION™ FieldbusDC 12 ...24V (DC 12 ...17.5V Fisco)DC 16 ...24V (DC 16 ...17.5V Fisco)
PROFIBUS ® PADC 12 ...24V (DC 12 ...17.5V Fisco)DC 16 ...24V (DC 16 ...17.5V Fisco)
Material
Case, primary instrument
Single chamber case, plasticPBT, polyester
Single chamber case, aluminiumDie-casting AlSi10Mg, powder-coated on PE basis
Single chamber case, cast stainless steelStainless steel 316L
Single chamber case, electropolished stainless steel, deep-drawnStainless steel 316L
Double chamber case, plasticPBT, polyester
Double chamber case, aluminiumDie-casting AlSi10Mg, powder-coated on PE basis
Double chamber case, cast stainless steelStainless steel 316L
Case, secondary instrument
Single chamber case, plasticPBT, polyester
Single chamber case, aluminiumDie-casting AlSi10Mg, powder-coated on PE basis
Single chamber case, cast stainless steelStainless steel 316L
Single chamber case, electropolished stainless steel, deep-drawnStainless steel 316L
LogoDescription
SIL IEC 61508 / IEC 6151SIL 2 (option) 1) Functional safety ■ 1-channel operation up to SIL 2 ■ Multi-channel operation (homogeneous, redundant) up to SIL 3
-NAMUR recommendations NE21 - Electrical compatibility of equipment NE43 - Signal level for failure information NE53 - Compatibility of field instruments NE107 - Self-monitoring and diagnostics
DescriptionOrder number
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HART ® modem for USB interface, specifically designed for use with notebooks (model 010031)11025166
HART ® modem for RS-232 interface (model 010001)7957522
HART ® modem for Bluetooth interface Ex ia IIC (model 010041)11364254
PowerXpress HART ® modem, with optional power supply (model 010031P)14133234
Welding socket for process connection G½flush1192299
Welding socket for process connection G1flush1192264
Welding socket for process connection G1½flush2158982
Welding socket for process connection G1hygienic flush2166011
Instrument mounting bracket for wall or pipe mounting, stainless steel14309985
Overvoltage limit for transmitters, 4 ... 20 mA, ½NPT, series connection, Ex i and Ex d14013656
Overvoltage limit for transmitters, 4 ...20 mA, M20 x 1.5, series connection, Ex i and Ex d14002489
Overvoltage limit for transmitters, FF / PROFIBUS, ½NPT, series connection, Ex i and Ex d14013658
Model DI-PT-R display and operating module, case cover aluminium with window12298884
Model DI-PT-R display and operating module, case cover electropolished cast stainless steel with window13315269
Model DI-PT-R display and operating module, case cover plastic with window13315277
Model DI-PT-R display and operating module, case cover cast stainless steel with window for single chamber case12298906
Model DI-PT-R display and operating module, case cover cast stainless steel with window for double chamber case14045598
Model DI-PT-E external display and operating module, aluminium case12354954
Model DI-PT-E external display and operating module, cast stainless steel case12355101
Model DI-PT-E external display and operating module, plastic case14134247