They are used in wet, dry, dominant and pre-acting automatic sprinkler systems to detect pressure drop or increase and give an alarm. It is available in two models as air and water pressure switches. It can be used indoors and outdoors. The maximum pressure setting range is 4-20psi.

Working Temperature: -10 °C ~ +80°C 
Connection:  ½” Npt
Maximum Working Pressure: 175psi
Approvals: FM, UL