Chamberlain Safety Sensors for Garage Opener

Updated August 7, 2026

Condition: USED - CUSTOMER RETURN Functional?: Unable to Test In Packaging?: Yes Missing Parts?: Unknown Brand: Chamberlain Model: 820CB 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.. Reversing sensors to ensure maximum safety. Projects an invisible light beam to prevent accidents. Compatible with all Chamberlain garage door openers. Compatible with Chamberlain, lift master and most craftsman. For use with every Chamberlain garage door. Use: replacement for damaged sensors. Easy installation. Enhanced trouble shooting, 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. 2-sensors, mounting brackets, 18 in. of extension wire, instruction manual. . Commercial/Residential: Residential. Garage Door Part/Accessory Type: Garage Door Safety Sensor. Product Weight (lb.): 0.84 lb. Product Depth (in.): 6.25 in. Product Height (in.): 4.56 in. Product Width (in.): 4.5 in.

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