Product Parameters

• Pressure Ranges: from 200 mbar up to 16 bar differential
• Static Line Pressures: from 0.5 up to 60 bar including on one port only
• Accuracy: ±0.5% of full scale (IEC 60770)
• Output Signal: 4-20mA or 0-10V
• Electrical Connections: DIN43650A plug and Brad Harrison mini change
• Pressure Connection: G1/2, 7/16 UNF male and G1/4 female
• Special Features: high overpressure
• Special Options: ATEX approved intrinsic safety
• Media Compatibility: Stainless steel 316L, FKM seals
• Dimensions: 48 x 40 x 40 mm excluding connectors
• Weight: ~250g

Product Description

The DMD331 is an unconventional design for measuring differential pressure, in that two separate pressure sensors are utilised inside to measure the pressure at two ports.  The difference between the two measurements are subtracted to create the differential pressure output signal.

The main advantage of this type of sensor is that full line pressure can be applied to one side without damaging the sensor.   This also makes it unnecessary to incorporate a complex mechanical protection device, keeping size to a minimum dimensions and reduces the cost compared to more conventional differential pressure sensor technology.

The DMD 331 has 6 nominal pressure range from 0-0.2 bar up to 0-16 bar differential and each range has a choice of sub-ranges which can be selected depending on the required level of overpressure rating.

The lowest possible scaled pressure range is 0 to 20 mbar differential and this can withstand a 500 mbar overpressure on either the positive or the negative port.

The differential pressure signals can be transmitted as linear 4-20mA or 0-10Vdc analog output.

The all stainless steel 316L DMD 331 wet wet differential pressure sensor is suitable for use with compatible liquids down to relatively low differential pressures.

The compact size of the DMD-331 dp sensor makes it ideal for use in dense instrumentation packages where there is very little space between components for fitting a conventional dp transmitter.

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