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Siemens® QBM81-5 Differential Pressure Monitor

KSh 12058

In stock

Siemens® QBM81-5 Differential Pressure Monitor use proven sensing technology to deliver accurate and repeatable data in applications that require monitoring of differential pressure.QBM Series Differential Pressure Devices can be used in a wide range of applications where differential air pressure monitoring is required.
Applications: HVAC, Cleanrooms, prevailing airflows.

Siemens® QBM81-5 Differential Pressure Monitor used for air and nonaggressive gases. Differential Pressure Switches are used to monitor differential pressure, under pressure, and overpressure in HVAC installations.
Features of Siemens® QBM81-5 Differential Pressure Monitor :

  • Integral Mounting Bracket and Snap‑On Cover with a Single Screw for Easy Installation
  • Loop Powered 4-20 mA Output Signal
  • Ultra‑Low Susceptibility to Temperature
  • Resettable Zero Point
  • No Mechanical Aging

Additional information



Model No


Digital Output

1-pin , Potential-free , Switchover contact

Permissible Operating Pressure

7500 Pa

Ambient Temperature

-20…85 °C


Diaphragm vertical, pressure connection pointing downward


50…500 Pa

Switching Voltage

AC 24…250 V

Switching Current

0.01…5 (3) A

Pressure Connection Size

Connection branch, 6.2 mm dia

Protection Class



81 x 90 mm


200 Grams

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Differential Pressure Monitor

Siemens® QBM81-5 Differential Pressure Monitor

KSh 12058

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