Beam Break OR safety sensorr

[grcshekar1]

I have a door of 15 inch width and 25 inch height. I need to sense if there is any object (pets, human etc.,) between the door because the door opens and closes automatically on motion sensing but not stop closing if there is an object in between

 

[shortbus=]

Look at how a garage door sensor works, they are a beam break/opto sensor.

How Do Garage Door Safety Sensors Work? - Fresno Garage Door Repair

Garage door sensors are designed to prevent accidents caused by automatic garage doors. Read on to see if your Fresno door needs to be repaired.

precisiondoorfresno.com