Description
The Siemens QBM3020-5 differential pressure sensor is part of the Siemens Symaro sensor range for HVAC and building automation. It measures differential pressure in air and non-aggressive gases, helping control systems monitor ventilation performance and maintain suitable operating conditions.
The sensor can be used to monitor pressure differences across filters, check airflow in ventilation ducts, and support fan control. Depending on the connected control system and configuration, its output can also support airflow measurement using a pressure-based calculation.
Key Specifications
|
Specification |
Details |
|---|---|
|
Brand |
Siemens |
|
Model |
QBM3020-5 |
|
Product Type |
Differential pressure sensor |
|
Measuring Range |
0–500 Pa |
|
Output Signal |
0–10 V DC |
|
Operating Voltage |
AC 24 V ±15% or DC 13.5–33 V |
|
Measured Medium |
Air and non-aggressive gases |
|
Sensing Element |
Pressure diaphragm with silicon membrane and ceramic lever |
|
Electrical Connection |
Screw terminals |
|
Pressure Connection |
Approx. 6.2 mm connection branches |
|
Enclosure Protection |
IP54 |
|
Response Time |
Less than 20 ms, according to family technical specifications |
Typical Applications
– HVAC duct differential pressure monitoring
– Air filter pressure-drop monitoring
– Ventilation airflow checks
– Fan and ventilation system control
– Building management system integration
– Pressure monitoring in laboratories and clean rooms
Installation Considerations
Connect the sensor to a compatible controller that accepts a 0–10 V DC signal. Check the supply voltage, pressure connection, measurement range, and wiring diagram before installation. Use it only with the specified air or non-aggressive gas media.
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