SW-3 For lift door sensor, building Magnetic and other non- contact switch; Mono-stable,normally open mode/Bi-stable,normally open mode Screw fixation; Choice of sensitivity, cable length . Seal design is applicable for hard working surroundings. Triggered from dead ahead; In the magnetic field, the magnetic switch in the pull- in state, and maintains this state untilleaving the magnetic field to come back to the initial state of disconnect state.Type: Mono-stable,normally open mode/Bi-stable,normally open mode Triggered from dead ahead; Application in elevator car level for position sensing, Switch is with dustproof and explosion-proof plastic case, foreign-made reed switch with high life; SW-3(A/B) ELEVATOR PROXIMITY SWITCHContactNormalOpenMountingScrewfixationMaterialNylonWiringDoubleinsulation cableSwitchingVac-max200Operating principleMagnetactuationSwitchingA-max1.0Switching frequencyHz-max500Operatingtemperature℃-25-78ShockG-max50g/11msStorageTemperature℃-25-90VibrationG-max35gSwitchingtimems-max.0.8Mechanical LifemillionsReleasetimems-max0.1Electrical lifemillionsSW-3AMono-stable N/O an SW-3B Bi-stable N/O switch