Delayed Adjustable Metal Detector Sensor Module Light Operated Motion Detector

delayed, adjustable, light-operated, Infrared Sensor Module Multifunctional adjustable induction Human body has a constant body temperature, general to 37 ° so will issue a particular wavelength of about 10 um infrared, passive infrared sensor is by detecting the human body and 10 um ir, so other objects except the body does not trigger probe movement.Once the intrusion detection area, the human body infrared radiation through part of the lens focus, and pyroelectric receive,