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Siemens QBM81 Series Differential Pressure Switch measures air and non-aggressive gases which are easy to mount also feature switching cycles, highly precise setting, and long-term stability. For ventilation and air conditioning plants. This siemens pressure switch with single pole change over output has a pressure range of 20 to 5000 Pa. Siemens Pressure Switch has an IP54 protection class and a temperature range of 0 to 70 °C.
- To monitor air filters, airflow, fan belts
- To monitor the pressure in clean rooms, kitchens, etc.
- Siemens Pressure Switch is easy to mount
- >1 Mio switching cycles
- Highly precise setting
- Siemens Pressure Switch has Long-term stability.
|Select Model and Range||QBM81-10 : 1 to 10 mbar, QBM81-10 : 100 to 1000 Pa, QBM81-20 : 5 to 20 mbar, QBM81-20 : 500 to 2000 Pa, QBM81-3 : 0, 2 to 3 mbar, QBM81-3 : 20 to 300 Pa, QBM81-5 : 0, 5 to 5 mbar, QBM81-5 : 50 to 500 Pa, QBM81-50 : 10 to 50 mbar, QBM81-50 : 1000 to 5000 Pa|
|Type of switch||Single-pole change-over, multi-layer contact|
|Electrical Connection||3 screw terminals|
|Operating Temperature||–30 °C to 85 °C|
|Operating Humidity||Less than 90 % RH (non-condensing)|
|Storage Temperature||–40 °C to 85 °C|
|Standards||EN 61326-x Electrical equipment involved in measurement, control,and laboratory use; EMV requirements; general requirements|
|Cable Entry||PG11 cable gland|
|Housing||Fiber-glass reinforced polycarbonate|
|Protection class||III according to EN 60730-1|
|Calibration||Provided alongwith and valid for 1 year, traceable to National Standards.|
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