Siemens QBM81-10 : Differential Pressure Switch, 0.4" to 4.0" Inch WC, Adjustable
The QBM81-... Differential Pressure Switches are used to monitor differential pressure, underpressure and overpressure in HVAC installations. By measuring differential pressure, they monitor the state of air filters, prevailing airflows, damaged fan belts and overpressure in clean rooms, kitchens, etc. They are also used to monitor differential pressure and positive and negative relative pressure in HVAC systems.
Specifications
| Digital outputs | CO: 1 , Potential-free |
| Measuring range, pressure | 0.4-4.0 WC |
| Digital output, switching voltage | AC 24…250 V; 24 V |
| Digital output, switching current | 0.01…5 (3)A |
| Degree of protection | IP54 |
Datasheets
 | Siemens QBM81-10 Differential Pressure Switch Data Sheet |
| Siemens QBM81 Mounting Instructions |
| Siemens Environmental Product Declaration |
| Siemens EU type examination certificate |
- Pressure Range:
- 0.4 to 4.0
- Reset:
- Automatic
