· PIR, Passive Infrared Sensor. The temperature of the human body is generally 37°C, and it emits infrared rays with a specific wavelength of about 10 nanometers. This infrared ray is enhanced by a Fresnel filter and then concentrated on the PIR sensor. After detection and processing, an alarm signal can be generated. In this way, only when a person or animal is detected passing by, the alarm will be triggered

  Note: Due to the complex external environment, other abnormal factors may also trigger the PIR alarm by mistake. In addition, PIR motion detection is not affected by arming settings