W Series Pressure switch

Specifications CALIBRATION All models are factory set and are not field resettable. CONSTRUCTION Electron beam welded diaphragm sensor; negative rate "Snap Action" Belleville load spring. MATERIALS Wetted parts are VIM - VAR 316L stainless steel; Other materials are available. LEAKAGE 100% helium leak tested. SURFACE FINISH 10 Ra standard, 5 Ra optional. TEMPERATURE Operating: 0° to 130°F Non-operating: -40 to 180°F Higher temperature constructions are available. ELECTRICAL All units utilize a UL recognized and CSA listed electrical switch. Gold contacts: 1 A resistive, 0.5 A inductive @ 28 VDC Silver contacts: 5 A resistive, 3 A inductive @ 28 VDC, 5 A resistive @ 250 VAC; except E units which are 3 A @28 VDC ENCLOSURE P and PV type units are vented to ambient conditions for sensing reference (ambient) pressure; E type units have hermetically sealed contacts, a fixed reference pressure and a secondary seal. INSTALLATION Insensitive to mounting attitude. MINIMUM OPERATING Up to 1,000,000 cycles depending on type and application.