PIR d204b, pyroelectric infrared sensor, is normally known as a motion detector. It is a passive sensor based on measuring infrared light radiating from objects within its field of view. The detector itself cannot emit infrared. It is commonly used in burglar alarms and smart lighting applications.

Normally PIR works with a fresnel lens. The human body has a constant body temperature, which is different from the ambient temperature. When a human body moves, this difference is detected by analog PIR senor through a Fresnel lens, which outputs an signal.

As one of the most professional pir sensor manufacturers in China, Senba Sensing Technology Co.,Ltd., was founded in 2005, with the focus on producing the top quality photoelectric components. If you want to know more details, just feel free to contact us!