WIKA Differential Pressure Gauge with Output Signal (DPGT40)

With integrable working pressure indication (DELTA-trans)


Monitoring and control of filters, compressors and pumps for:

  • Boilers and pressure vesselsDrinking and cooling-water treatment plants
  • Pressure-boosting and pumping stations
  • Heating technology
  • Fire-extinguishing systems

Special features

  • Transmission of process values to the control room (e.g. 4 … 20 mA)
  • Shatterproof window and robust aluminium or stainless steel measuring chamber for increased requirements
  • Optionally with approvals for hazardous areas
  • High ingress protection, IP65, for outdoor use and processes with high condensation
  • Low measuring range from 0 … 160 mbar

Sales Contact (Wika.sales@asyatrafo.com)




The differential pressure gauges of the DELTA-line product family are primarily used for the monitoring of low differential pressures where there are high requirements in terms of one-sided overpressure and static pressure.

Typical markets for these differential pressure gauges are the process heating technology, the heating, ventilation and air-conditioning industries, the water/wastewater industry, and machine building and plant construction. For these, the main function of the measuring instruments is the monitoring and control of filters, compressors and pumps.

Wherever a signal transmission is needed and, at the same time, a differential pressure has to be indicated locally, the DELTA-trans finds its use. An electronic angle encoder, proven in safety-critical automotive applications, determines the position of the pointer shaft – it is a non-contact sensor and completely free from wear and friction.

From this, the electrical output signal proportional to the pressure, e.g. 4 … 20 mA, is produced, which then acts to transmit the signal to the control room.

Often in these applications, alongside the display of the differential pressure, the current working pressure is also relevant. For this reason, a working pressure indication is integrated within the DELTA-trans differential pressure gauge with output signal as standard.

For differential pressure gauges with aluminium measuring chamber, a version with integrated working pressure indication can be supplied in addition to the differential pressure display. The two easily readable, mechanical on-site displays need no power supply and enable the simultaneous reading of the working and the differential pressure. Furthermore, this saves on an additional measuring and sealing point, reducing additional expense for piping and mounting.

The measuring chamber, depending on the requirement and application, can be made from aluminium or stainless steel. Through the increased stability, the stainless steel measuring chamber is also suitable for gaseous media.