Chamberlain 820CB Replacement Garage Door Safety Sensor, 2-Pk. – Quantity 1

Price: $53.99 - $38.48
(as of Oct 15, 2025 01:42:44 UTC – Details)


The Replacement Safety Sensors project an invisible light beam across the inside of the garage door to prevent accidents and are required for safe use of all Chamberlain Garage Door Openers. Whenever there is an obstruction, the garage door will automatically reverse before causing any damage. Chamberlain compatible, these sensors replace defective or damaged sensors for every Chamberlain Garage Door Opener manufactured after 1997.
For use with every Chamberlain garage door opener manufactured after 1997
Enhanced troubleshooting, most intuitive safety reversing sensors
Low profile reduces risk of being knocked out of alignment
Whenever there is an obstruction, the garage door will automatically reverse
Compatible with Chamberlain, LiftMaster and most Craftsman garage door openers
Includes 2 sensors, mounting brackets, 18 inches of extension wire, instruction manual