MDM491 Piezoresistive Differential Pressure Transmitter

Full stainless steel construction, compact size, easy installation.

Welding and full-sealed construction. housing protection IP65.

Using piezoresistive differential pressure sensor, 316L isolated diaphragm.

Temperature compensation and aging, stable performance.

Zero and span adjustable outside for plug connection version.

MDM491 Piezoresistive Differential Pressure Transmitter is a compact full-welded (no sealed ring) differential measurement element. Silicon oil is filled in between die and two diaphragms, when the measured differential pressure is added on two diaphragms, the pressure could be transferred onto die through silicon oil. Sensor die connects with amplifier circuit through wires, using semi-conductor’s piezoresistive effect, transforming differential pressure signal into electric signal. The output signal from Weston Bridge on the sensing die has a good linear relationship with differential pressure, so the measured differential pressure could be measured precisely. The whole product is used for differential pressure measurement of various gases and liquids in pipeline in many fields including petroleum, chemi-industry, power station and hydrology, etc.