Passive infrared sensor
Electronic sensor that measures infrared light
A passive infrared sensor (PIR sensor) is an electronic device that measures infrared (IR) radiation emitted by objects in its field of view. They are most commonly used in motion detectors, including security alarms and automatic lighting systems.
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Passive infrared sensor
Electronic sensor that measures infrared light
A passive infrared sensor (PIR sensor) is an electronic device that measures infrared (IR) radiation emitted by objects in its field of view. They are most commonly used in motion detectors, including security alarms and automatic lighting systems.
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A passive infrared sensor (PIR sensor) is an electronic device that measures infrared (IR) radiation emitted by objects in its field of view. They are most commonly used in motion detectors, including security alarms and automatic lighting systems. PIR sensors detect general movement but do not provide information on the source of motion; for that purpose, an imaging IR sensor is required. PIR sensors are often referred to simply as "PIR", or sometimes "PID" (passive infrared detector). The term "passive" indicates that the device does not emit energy, but detects infrared radiation (heat) emitted or reflected by objects.
Texto: Wikipédia em inglês, CC BY-SA 4.0. · Imagem: Jack LaRosa (Public domain) ·
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