Lower is easy to stand above with a foot on either side.
How to fix garage door sensor alignment.
Garage door sensors must be aligned to ensure your garage door opens and closes properly.
Garage door sensors are designed to prevent the door from closing if something obscures the sensor.
In other words something is probably blocking the beam.
Since the sensors are often placed 6 above the ground all sorts of items could get in the way.
Higher than that can miss many low lying objects including pets.
Proper height for a garage door sensor is 4 to 6 inches 10 2 to 15 2 cm.
This is a brief demonstration on how to adjust the safety sensors on your garage door.