Data Sheet for Product

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Siemens Differential pressure sensor QBM3020.. / QBM3120.. CA1N1916en01
Smart Infrastructure 2019-10-09
Accessories
Additional sets of air duct probes are available depending on measuring requirements.
Various mounting brackets are also available depending on installation location.
Type Name Data sheet
AQB2000
Mounting bracket, for mounting sensors in isolated air
ducts
N1590
AQB21.2
Top hat rail adapters (5 pieces) for DIN top hat rails,
HT 35-7.5
N1590
FK-PZ1
Air duct probe, short, stainless steel, with elastic lead-
through
N1589
FK-PZ2
Air duct probe, long, aluminum, with orifice plates for
precise measuring requirements
N1589
Mode of operation
The sensor acquires the differential pressure using a silicon rubber membrane and
ceramic bar. Depending on the type of sensor, the sensor generates a linear or extract-
ing-the-root signal DC 0...10 V with the QBM3020-.. or 4…20 mA with the QBM3120-..
which is calibrated and compensated for temperature.
The individual adjustment of the pressure measurement range for extracting-the-root
sensors is done by means of a potentiometer.