Siemens Automatic Reset High Pressure Switch 2" to 20" W.C

The QPH31 Series pressure switches break the electrical circuit when the pressure increases above the adjusted value. Features: UL listed for USA and Canada, FM approved, ISO 9001 certified; European approved versions available Adjustable pressure range from 1 to 112 inches water column (WC) Automatic and manual reset models Surge protected up to 15 psi