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The application of PIR motion sensor

PIR motion sensors can be seen everywhere in our life. It is widely used in automatic sensing doors, lamps, switches; smart electrical appliances; anti-intrusion alarm systems; intercom systems, etc.

Feb 07,2023

PIR motion sensors can be seen everywhere in our life. It is widely used in automatic sensing doors, lamps, switches; smart electrical appliances; anti-intrusion alarm systems; intercom systems, etc.

Application of PIR motion sensor in anti-theft alarm system

There are mainly various anti-theft devices such as pressure-triggered, switch electronics and pressure-shading triggered anti-theft alarms on the market, but PIR sensor anti-theft alarms are simple to make, low in cost, high in sensitivity, concealment, and strong in anti-interference ability.

The PIR motion sensor does not need a light source, it receives the infrared rays emitted by the measured object itself. In a dark environment, the PIR motion sensor has high sensitivity to the movement of living organisms, and can send out danger signals at the first time. It is suitable for anti-theft alarms in important places such as homes, offices, warehouses, and laboratories.

PIR motion sensors play an important role in automatic sensing devices

The specific infrared wavelength of the human body is about 10 μm, which is enhanced by the Fresnel filter and then gathered to the infrared induction source (PIR). After being processed by the circuit, a pyro-infrared signal is generated. The PIR motion sensor notifies the opening and closing of the automatic sensing device by detecting the movement of people.

The automatic sensing doors, lamps and switches in our life can use PIR motion sensors to achieve the purpose of freeing hands.

PIR MOTION SENSOR RD624