D202X is 2 elements PIR sensor, with small detection angle. Mainly used for toys and other small angle requirement products.
PIR sensor sense the motion object, always used to detet the human. There is a detect rang for the PIR sensor. When a people move in or out of the detect rang, the PIR sensor will be triggered. PIR sensor are low-power, small, easy to used. For this reason it can be used for the alarm system and lighting control. PIR sensor also named passive infrared, Pyroelectric or IR motion sensor.
Excellent S/N ratio
Slight movement can be detectable
IR Receiving Electrode
2×1mm, 2 elements
≥1.4 ×108 cmHz1/2/W
Field of View
Wireless security sensors
Security alarm system
1. What can trigger a PIR sensor?
The first cause of PIR false alarms is low or unstable voltage at the detector. Test to make sure the voltage at each PIR is above 13VDC and stable. The second cause of false alarms is sudden infrared movement / heat changes in view of the detector.
2. Do PIR sensors work in the dark?
Yes, motion sensors work in the dark. The way that a motion sensor detects movement has nothing to do with how light or dark it is in the immediate area. Since infrared energy is present and can be detected regardless of the amount of light in the environment, a PIR motion sensor will work just fine in the dark.