When this beam is obstructed by an object of some sort, you won’t see a solid yellow light, and the garage door will immediately quit working. Similarly, the Genie brand is owned by Overhead Door, so Genie’s Safe-T-Beam sensor (also on Amazon) is the same sensor used for both Genie and Overhead Door garage door openers. The image pictured to the left was a fun little home project I did with my sone, as I’ve been trying to get him more interested in electronics and exploring all the fun and cool things that can be created. For people who do not know, the transmitter has the yellow light and the receiving sensor has the green light. This replacement garage door safety sensor kit uses an invisible infrared beam across the opening of the door, the system detects any object passing through the LED beam of light and automatically reverses the closing garage door. Whenever there is an obstruction, the garage door will automatically reverse before causing any damage. 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. Digi-code model cr2149 universal beam sensor model cr2149 universal beam sensor the universal beam sensor works with all major brands of garage door openers - chamberlain, lift master, craftsman, overhead (1995+), genie, challenger, Stanley, linear, moore-o-matic and raynor models ( … So if you upgraded your Overhead Door garage door opener to a Genie opener, then you are in luck. Using an invisible infrared beam across the opening of the door, the Genie garage door safety sensor detects any object passing through the LED beam of light and automatically reverses the closing garage door, keeping children and pets safe. The Genie Safe-T-Beam system is designed to ensure maximum safety for your garage door opener operation. I am posting this in response to an inquiry about how garage door safety beam sensors work. The garage door sensor yellow light and the green light together create a solid illumination. Genies Safe-T-Beam system is designed to ensure maximum safety for your garage door opener operation.