LiftMaster Sears Craftsman 041C4398A RPM Sensor Assembly Step #2 Measure the inside

Step #2 Measure the inside diameter (ID) of the spring

light commercial and solar applications

24-240 VAC/DC

Easily connects via Ethernet cable to your router

LiftMaster Sears Craftsman 041C4398A RPM Sensor Assembly Step #2 Measure the inside041C4398A is a RPM sensor kit is a single 5 bladed photo interrupter sensor. Compatible with various garage door openers made after 1995. Check the manual for your specific model number before ordering to ensure compatibility. Also known as: 1A4903, 41C3005, K7516426, 41B3000, 41C4398A, 41C4398, 41C43981 If your garage door trolley goes down 6 inches and comes back 6 inches then this is your problem Compatible with Liftmaster and Chamberlain garage