VACANCY SENSOR – PASSIVE INFRARED WALL SWITCH
PIR sensors monitor the patterns of background heat energy in a given space. That is, if you sit still for a long time, the sensor will think of your static heat signature as a normal condition and return to “Off” mode. When a movement of a heat source is detected the sensor turns “On”. When the sensor does not detect the heat source movement it returns to “Off” mode. PIR sensing technology is great for avoiding false triggers.