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A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors . PIR sensors are commonly used in security alarms and automatic lighting applications.
Passive infrared sensors are often designed around pyroelectric materials, as the heat of a human or animal from several feet away is enough to generate a voltage. [22] Thermal Sensors: Infrared detectors, fire alarms, gas sensors, and motion sensors utilize high voltage/current responsivity. Lead-based materials (e.g., PMN-PT) excel here due ...
An infrared detector is a detector that reacts to infrared (IR) radiation. The two main types of detectors are thermal and photonic (photodetectors). The thermal effects of the incident IR radiation can be followed through many temperature dependent phenomena. [2] Bolometers and microbolometers are based on changes in resistance.
Due to the unipolar axis characteristics of the pyroelectric crystal, it is characterized by asymmetry. Polarization due to changes in temperature, the so-called pyroelectric effect, is currently widely used in sensor technology. Pyroelectric crystals need to be very thin to prepare and are plated in a direction perpendicular to the polar axis.
Murata Manufacturing Co., Ltd. (株式会社村田製作所, Kabushiki-gaisha Murata Seisakusho) is a Japanese manufacturer of electronic components, based in Nagaokakyo, Kyoto. It produces ceramic passive electronic components, primarily capacitors , and has a majority marketshare worldwide in ceramic filters , high-frequency parts, and sensors .
An optical sensor converts light rays into electronic signals. It measures the physical quantity of light and then translates it into a form readable by an instrument. An optical sensor is generally part of a larger system that integrates a source of light, a measuring device, and the optical sensor. This is often connected to an electrical ...
A nondispersive infrared sensor (or NDIR sensor) is a simple spectroscopic sensor often used as a gas detector.It is non-dispersive in the fact that no dispersive element (e.g a prism or diffraction grating as is often present in other spectrometers) is used to separate out (like a monochromator) the broadband light into a narrow spectrum suitable for gas sensing.
Murata Electronics Oy is a Finnish company (previously called VTI Technologies Oy) that design, develop and manufacture accelerometers, inclinometers and gyro sensors based on the company's proprietary 3D MEMS technology. These sensors are used to measure things such as acceleration, inclination, vibration and pressure.