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The automatic door has a special infrared sensor in which a person walks towards the door then the sensor detects that someone in there, it then activates the electromagnets in the entrance system which allows the door to open at at certain speed.
Wiki User
∙ 11y ago
Wiki User
∙ 13y agoAutomatic doors use a motion sensor, or optical sensor. The sensors are usually based at the top of the door, slightly in front of it, so that it can detect when someone becomes near to the door and trigger it to open as a result. They are ideal for busy shops or industrial buildings, where having regular doors may cause congestion or be a safety hazard.
Wiki User
∙ 13y agoAdd your answer:
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