Pressure Transmitter D21 Series Delta Mobrey

Pressure Transmitter D21 Series Delta Mobrey

The D21 SMART Pressure Transmitters are suitable for measurement of pressure, underpressure, and absolute pressure of gases, vapours and liquids. The active sensing element is a piezoresistive silicon sensor separated from the medium by a diaphragm and by a specifically selected type of manometric liquid. The casing is made of cast aluminium alloy or 316 stainless steel with degree of protection IP66/67. The design of the casing enables the use of a local display, rotation of the display by 90° and a choice of cable direction.

ATEX certified for use in Zone 0/20 and Zone 1/21 Hazardous Areas and available with 316L, Hastelloy C 276 or Gold wetted parts materials, the D21 SMART Pressure Transmitters are suitable for use in a wide range of applications. One unique feature of all models in the D-Series is the backlit LCD display which facilitates local monitoring in light deficient environments by enhancing display visibility.

The D-Series can also be supplied with Delta’s user-friendly ‘D-Soft’ remote communication software.  Using the HART communication protocol, this software provides users with a convenient way to calibrate, configure and monitor the instrument by connecting it to a PC via Delta’s USB/Bluetooth to HART converter.


  • ATEX - Flameproof and Intrinsically Safe
    IECEx - Flameproof and Intrinsically Safe
  • SIL 2 certificate
  • Compliant to NAMUR NE-43
  • High accuracy ±0.075% (better accuracy upon request)
  • Fully HART ® compatible
  • Static pressure limit up to 1200 bar
  • 4-20mA, 0-20mA or 0-5mA analogue with digital communications
  • Gold (Au) plated diaphragm option
  • Hastelloy C276 wetted part option
  • Programmable range, zero shift, characteristic and damping ratio with local panel keys
  • Lightweight
  • Linearisation of output signal on 20 point curve
  • Write protection option through DKAP-03 communicator, ‘D-Soft’ program or software using library EDDL


  1. Cost-Effective

    The D-Series offers customers a high specification and comprehensive product range at very competitive prices

  2. Backlit LCD Display

    A backlit display facilitates local monitoring in light deficient environments by enhancing display visibility

  3. Easily Configurable

    The D-Series transmitters are easily set up and configured either using a standard HART communicator or via Delta’s user-friendly ‘D-Soft’ communication software

  4. Accuracy

    The D-Series transmitters have a standard accuracy of 0.075% with even better accuracy being available upon request


The D Series SMART Pressure Transmitter is suitable for a wide range of applications in:

  • Oil & Gas
  • Chemical
  • Petrochemical
  • Power

The choice of models available ensures that the Delta Transmitter is suitable for use in:

  • Corrosive atmospheres
  • Resistant to chemical attack



  • ≤ ±0 .075% of the calibrated range
  • (≤±0.1% for range B1)
  • Special version:  ≤±0.05% of the calibrated range

Long-term stability

  • ≤ accuracy for 3 years
  • (for the nominal measuring range) ≤2x accuracy for 5 years
  • 20 version: ≤ accuracy for 6 years

Thermal error

  • < ±0.05% (FSO) / 10°C
  • (0.1% for ranges A0, A2, B1)
  • max. ±0.25% (FSO) in the whole compensation range
  • (0.4% for ranges A0, A2, B1)

Thermal compensation range

  • -25...80°C
  • -40 ...80°C – special version

Response time: 16...480ms(programmable)

Additional electronic damping: 0...60 s

Error due to supply voltage changes: 0.002% (FSO) / V

Electrical parameters 

Power supply:
  • 10...55 VDC / Exia:10,.5...30 VDC / Exd:13.5(10.5)...45 VDC
  • SIL2: 15...45 VDC / SIL2 Exia: 16...28 VDC
Output signal
  • 4...20 mA, two wire transmission
  • Special Version: 0...20 / 0...5 / 4...20 [mA]

Resistance required: min. 240Ω for communication


Wetted parts: 316LSS, Hastelloy C 276, Au


Casing: Aluminium, 316SS

Material of window: Polycarbonate glass, hardened glass


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