LiftMaster LC36M Light Curtain Monitored - 36 Inch 1 loop detector

1 loop detector

041C4398A is a RPM sensor kit is a single 5-bladed photo interrupter sensor

One Liftmaster 41A3489 Sears Craftsman complete trolley assembly for chain drive garage door openers

LA500PKGUL Owners Manual

LiftMaster LC36M Light Curtain Monitored - 36 Inch 1 loop detectorMonitored Light Curtain The Monitored Light Curtain is a primary safety entrapment protection device that is compliant with UL 325. Provides up to 33 ft. of protection range and a minimum of 36 in. of height coverage to keep your customers, employees and equipment safe. Eight LEDs per side and 22 cross beams produce an invisible curtain of infrared light for maximum detection capability. Easy alignment with visible LEDs to indicate correct sensor