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In my office lights turn on automatically when I enter the room how does it know that I am in the room?
Iamnotjeff
Most likely the room has some sort of motion sensor to tell if someone is present.
A heat sensor can tell if a person is in the room by the heat generated by the human body. A sound sensor can respond to noise made by a person walking, talking or otherwise. Either will work.
The triggered sensor can turn on the lights or anything else electrically. The lights are usually attached to some kind of timer so that if no activity is detected in the room for a while, the lights are turned off until the next time the sensor is triggered.
Wiki User
∙ 7y ago
Wiki User
∙ 7y agoThere is a motion sensor mounted on the light switch which picks up your movement when you enter the room. That automatically turns on the light. When you leave the room and there is no motion for a set period of time it will turn the lights off. If you look at the light switch on the wall you will see the sensor.
Wiki User
∙ 7y agoElectric eye/sensor
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