differential pressure transmitter / analog / threaded / stainless steel
MDM491 Micro Sensor Co.,Ltd


  • Pressure type:


  • Output signal:


  • Mounting:


  • Other characteristics:

    stainless steel

  • Process temperature:

    Max.: 80 °C (176 °F)

    Min.: -10 °C (14 °F)

  • Pressure range:

    Max.: 20 bar (290.08 psi)

    Min.: 0.35 bar (5.08 psi)


MDM491 Piezoresistive Differential Pressure Transmitter is a compact full-welded (no sealed ring) differential measurement element with silicon oil filled. 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, 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.

•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.

Electric Characteristic
1. Power Supply:15V~28V DC
2. Output Signal: 4mA~20mA DC(2-wire); 0V/1V~5V/10V DC, 0mA~10mA/20mA DC(3-wire)
3. Electric Connection: plug or cable
4. Response Time:(10%~90%): ≤1ms
5. Insulation Resistance: 100MΩ, 50VDC
6. Pressure Range: 0~35kPa...2MPa
7. Static Pressure ≤20MPa

Construction Material
1. Housing: SS 1Cr18Ni9Ti
2. Diaphragm: SS 316L
3. Filled liquid: silicon oil

Visit www.microsensorcorp.com or mail sales@microsensor.cn for more details.