The infrapassive switch is used in ceiling mountings, in holders of MR16 halogen bulbs. With a suitable receiver, it is used for contactless control of lighting, ensuring economical and time-limited illumination. The transmitter is supplied by two batteries AA 1.5V or one 3 V CR-V3 lithium battery. It is activated by the body heat of moving people or animals or by heat of other objects. It works in two modes:
a) ON/OFF mode: the transmitter sends two different signals: one for turning on and the other for turning off of the appliance. The appliance is turned on as long as the sensor indicates people present.
b) ON mode: The transmittor sends only signal for turning on.
The ON time can be set by the “TIMER ” function directly on the receiver.
The size of the area covered by a ceiling-mounted PIR switch depends mainly on its installation height and turning angle. In general, the size of the movement detection zone is affected by a lot of other factors too, e.g. speed and direction of the people‘s movement with respect to the switch, ambient temperature, or presence of interfering sources (heaters, lighting, etc.). A tilting frame is extremely suitable for the switch to cover „blind“ angles of the other sensors in corners, niches, under balconies in large halls, etc.
