Advantages and disadvantages of infrared detectors
Shortcoming:Easy to be disturbed by various heat sources and sunlight sources.The infrared penetrating power is poor, and the infrared radiation of the human body is easy to be blocked and can not be easily received by the detector.Susceptible to radio frequency radiation interference.When the temperature of the environment is close to the body temperature, the detection and sensitivity decrease obviously, sometimes resulting in short-time failure.
Advantage：The device does not send any type of radiation, so the power consumption of the device is very small, and the concealment is better.Low price
