![]() ![]() The PIR sensor range is up to 10 meters at an angle of +15o or -15o. Then this charge is further improved by a built-in FET and fed to the output pin of the device which becomes applicable to an external circuit for further triggering and amplification of the alarm stages. The detected radiations are converted into an electrical charge, which is proportional to the detected level of the radiation. ![]() The term “passive” indicates that the sensor does not actively take part in the process, which means, it does not emit the referred IR signals itself, rather passively detects the infrared radiations coming from the human body in the surrounding area. The term PIR is the short form of the Passive Infra-Red.
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