They shoot an invisible beam between them which will sense if something is between them as it breaks the beam.
Photo sensor for garage door.
The sensors use two photo eye lenses that transmit an infrared beam between them.
The photo eye sensor is one of the most important parts of your garage door system.
Safety sensors include two mounted sections one on each side of the garage door opening.
Door opener photo cell sensors.
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Chamberlain liftmaster craftsman garage door opener replacement safety sensors g801cb p includes 2 sensors mounting brackets and hardware.
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One photo eye beam is installed on one side of the garage door and the other is installed on the other side with exact heights from the bottom of the door specified in the user manual.
Get it as soon as mon oct 7.
These sensors sit either side of your garage door near the ground.
If the sensors are not.
The beams work together to detect objects people or animals in the path of a descending garage door.