GE921 Adjustable Air Differential Pressure Switch for monitoring overpressure, vacuum and differential pressure of air or other non-combustible, non-aggressive gases. It can be used to sense (differential) pressure and flow of air in ducts and pipes.

Possible fields of application include:

* Monitoring air filters and ventilators
* Monitoring industrial cooling-air circuits
* Maximum air flow controller for variable air volume systems
* Overheating protection for fan heaters
* Monitoring flows in ventilation ducts
* Controlling air and fire-protection flaps
* Frost protection for heat exchangers
* Air proving in ventilation ducts

Max. differential pressure: 5000Pa
Protection Class: IP54
Output: 1.0A (0.4A)/ 250VAC
Working temperature:-20~85 C
Storage temperature: -40~85 C
Min. Actuating pressure: 20Pa(Standard);  min.starting interval: 10Pa; range: 20~30Pa
Installation Direction: vertical (standard installation style) 
Hose connection: pipe P6.2mm