Air Differential Pressure Monitor Siemens QBM81-10

Air Differential Pressure Monitor Siemens QBM81-10 monitors the air pressure difference between two points and gives a discrete output when the pressure difference goes above or below a set threshold. It has a single-pole change-over (SPDT) contact output with automatic reset. This Air pressure sensor housing is IP54 rated with a durable polycarbonate body, suitable for ambient temperatures from ‑30 °C to 85 °C and humidity below 90% RH. With a service life exceeding 1,000,000 switching cycles, it ensures long-term reliability. By detecting differential pressure changes, it helps maintain proper ventilation and system safety. While simple and robust, it does not provide continuous pressure readings, only threshold-based switching alerts. Applications:- Ventilation and air conditioning plants, air filters, kitchens, airflow, fan belts, monitor the pressure in clean rooms etc.