How Does An Automatic Door Work?

Automatic doors open as you come near to them and they shut behind after you walk through. Automatic doors are complex machines and they have many parts like a sensor and motor system. Automatic doors may seem simple, but they are not. They are complex machines. They that work together to open and close the doors safely. Some use. The sensor that is attached on the top of the door sends out a special light that identify the presence of a person near the door and the sensor sends out a signal to a motor to open the doors. Automatic doors

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