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Infrared sensors

Infrared sensors

Infrared sensors can be used to detect electromagnetic radiation in the infrared range and heat radiation. Infrared radiation, which lies at the end of the visible red light spectrum, is a frequently used option when objects can no longer be reliably detected with the visible light spectrum. Infrared sensors are divided into two groups: Sensing elements such as pyroelectric sensors or so-called thermopiles which are activated by the infrared radiation of foreign sources, and sensing elements that work with signals they send out themselves. The second group includes transmitted light sensors, photoelectric sensors, and scattered-light sensors. Infrared sensors are also familiar from their presence in remote control units, distance meters, and CCD chips in cameras, alarm systems, smoke and fire detectors, and their recognition of heat radiation from living beings.

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