siemens differential pressure sensor
siemens differential pressure sensor

Siemens QBM3020 Series Differential Pressure Sensor

Siemens QBM3020-1 Differential Pressure Sensor provide high measurement accuracy with an analog output signal of 4 to 20mA. And thanks to the built-in housing connectors for mounting, the installation of new Siemens sensor models is quick and easy. Its compact sensors are ideal for control and monitoring systems for ventilation and air pressure monitoring.


Measuring the slightest differential pressures in ventilation and air conditioning ducts 

Check air flows 

Monitor filters and control fans 

Pressure supervision in labs, production, and clean rooms 

For acquiring variable air flow in VAV plants on the supply and extract air side 

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Tax /GST included

Siemens QBM3020 Series Differential Pressure Sensor acquires differential, over and under pressure of air and non aggressive gases if a high degree of measuring accuracy and quality is required. It is also suited for measuring volume flow via differential pressure since the output signal can be set to extracting-the-root.


High degree of measuring accuracy

Adjustable characteristic curve (pressure-linear or extracting-the-root)

Zero-point adjustment

Simple and fast mounting thanks to integrated fixing angle bar in the housing

Maintenance free thanks to excellent long-term stability

Calibrated and temperature-compensated measuring signal

Supplied with plastic tubing

Very short response time

19 Items

Data sheet

Not galvanically separated, 3-wire connection, short-circuit proof, protected against reverse polarity.
Measuring medium
Air and non-aggressive gases
Response Time
< 20 ms
Operating Conditions
Temp : 0...70 °C
Operating Voltage
AC 24, DC 13.5 to 33 V
Output Voltage
DC 0 ...10 V
Sensing Method
Pressure diaphragm
Power Supply
Safety extra low voltage (SELV/PELV)
Power Consumption
0.5 VA
Screw terminals
Protection class
IP 54
Provided alongwith and valid for 1 year, traceable to National Standards
101 x 86 x 49 mm
0.196 kg
12 Months Manufacturer Warranty

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