The DMD831 differential pressure transmitters.
The DMD831 differential pressure transmitters.

The DMD 831 stainless steel transmitter includes an adjustable four-digit LED display, a pressure transmitter and two PNP pressure switch connections. Seven different versions of the DMD 831 are available, with differential pressures from 0… 80 mbar up to 0… 70 bar. The transmitters operate in media temperatures from -40°C to +125°C. Switching accuracy is +/- 0.5% FSO according to IEC 60770 and the transmitters are ingress protected to IP65.

Impress's differential pressure sensors and transmitters measure the difference in pressure from one side of a diaphragm to the other or between two diaphragms. When pressure is applied, they determine the pressure difference between positive and negative sides and transform this into a proportional electrical signal. Typically, this enables the measurement of pressure drop across a filter due to build up or blockages, or for measuring flow and level via a pressurised vessel.

The DMD 831 transmitter incorporates two piezoresistive stainless steel sensors and stainless steel diaphragms, making it suitable for a range of plant and process engineering applications, including HVAC, energy and laboratory applications. It can be used in process control applications, including pressure control for lubrication systems, hydraulics and pneumatics, air compressors, steam, water, fuels and oils.