The full name of infrared sensor switch is pyroelectric infrared sensor switch. Any object in nature, as long as the temperature is higher than absolute zero (-273℃), will always emit infrared radiation. The higher the temperature of the object, the smaller the peak wavelength of infrared radiation it emits, and the greater the energy of infrared radiation. . When a person enters the sensing range, the pyroelectric infrared sensor detects the change in the infrared spectrum of the human body and automatically turns on the load. If the person does not leave the sensing range, it will continue to turn on; after the person leaves, the load will be automatically turned off after a delay.
The main component of the infrared sensor switch is a pyroelectric infrared sensor. The human body has a certain body temperature, usually 36-37 degrees, so it emits infrared rays of a specific wavelength. The 9.5um infrared rays emitted by the human body are enhanced by the Fresnel lens to gather infrared rays. As for the induction source, the infrared induction source usually uses a pyroelectric infrared sensor. This kind of element will lose the charge balance when the temperature of the infrared radiation of the human body is changed, and the charge will be released outward. The subsequent circuit can trigger the switch after the detection and processing.
Infrared human body sensor switch can be separated from glass, cabinet and door！
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