The Square D Telemecanique XCKT2118G11 is a compact general-duty limit switch built for position sensing on conveyors, gates, and machine guards where space is tight and the environment is damp or dusty. Its NEMA 1/4/12 and IP65 enclosure means it shrugs off hose-down and airborne grit — rated for washdown and outdoor installation without an extra cover. The 1NO-1NC contact configuration (240 VAC 3 A, 250 VDC 0.27 A) gives you both a normally-open and normally-closed set in one switch, so you can wire the NC side into a safety circuit and the NO side into a PLC input without adding a second device. The thermoplastic roller lever actuator is replaceable and provides positive opening of the NC contacts per EN/IEC 60947-5-1 — that means the NC contacts are mechanically forced open even if they weld, which is the requirement for a safety limit switch on a guard door.
Ratings that matter for a mining or mill application
Rated operating temperature from -13 to 158 °F covers most outdoor and unheated plant environments in North America. The plastic body won't corrode in washdown or chemical mist, but it's not rated for direct impact from falling rock — mount it where the guard takes the hit. The actuation speed is rated at 1.5 m/s — fast enough for a pneumatic cylinder but not for a high-speed cam; if your application exceeds that speed, the contacts may bounce.
Approvals: UL 508, CSA C22.2, CE, and CCC. RoHS compliant.