Microsensorcorp MPM4891B Pressure Transmitter

Microsensorcorp MPM4891B Pressure Transmitter is a newly developed pressure transmitter part with high accuracy and stability. It is made up of a piezo-resistive pressure sensor and a specialized processing circuit. It is stable, reliable, compact in size. With a zero clearing button and manual pressure calibration function, it is easy to operate. MPM4891B is with an OEM package, suitable for application and development for various pressure transmitters.

Microsensorcorp MPM4891B Pressure Transmitter Features

  • Safe, reliable
  • Short circuit protection and reversed polarity protection
  • 2-wire current output
  • Manual zero-clearing function
  • Manual secondary calibration
  • Compact size, easy installation

Button Function

  • Without pressure, press the button for 5s for zero clearings, it outputs 4mA
  • If the transmitter is excited while pressing the button, it enters calibration mode, the output can be calibrated by LED indication. Please see the below chart for


  1. Please pay attention to protect sensor isolated diaphragm to avoid damaging the sensor or affecting the
  2. Please make sure the measured media shall be compatible with the contacting
  3. If users have a special requirement, please contact us


Range 0bar~0.1bar…400bar
Over pressure 1.5FS
Pressure type Gauge, Absolute or Sealed Gauge
Accuracy ±0.5%FS
Power Supply 11V~28V DC
Output 4mA~20mA DC (2-wire)
Load Resistance ≤ (U-11) / 0.02(Ω)
Zero Thermal Drift ±0.02%FS/℃
FS Thermal Drift ±0.02%FS/℃
Long-term Stability ±0.3%FS/year
Operation Temperature -25℃ ~75℃
Storage Temperature -40℃ ~80℃
Relative Humidity 0%~85%
O-ring Viton
Diaphragm SS316L
Leading Wire silicone rubber
Gross Weight 22g
Media Compatibility liquid or gas compatible with stainless steel and viton
Button Operation Phenomenon Function
 Excite power supply after pressing button  LED light on  Enter calibration mode
 Pressurize to lower limit of pressure  LED flash 2 times Zero calibration finished, low current calibration finished
 Pressurize to upper limit of pressure  LED flash 3 times FS calibration finished, middle current calibration finished
 Pressurize to upper limit of pressure  LED flash 4 times Calibration coefficient storage finished, high current calibration finished

Ref: Microsensorcorp.comDownload Datasheet: MPM4891B, Microsensorcorp-Pressure Transmitter

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