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  2. Passive infrared sensor - Wikipedia

    en.wikipedia.org/wiki/Passive_infrared_sensor

    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. PIR sensors detect general movement, but do not give ...

  3. Ring laser gyroscope - Wikipedia

    en.wikipedia.org/wiki/Ring_laser_gyroscope

    Ring laser gyroscope. A ring laser gyroscope (RLG) consists of a ring laser having two independent counter-propagating resonant modes over the same path; the difference in phase is used to detect rotation. It operates on the principle of the Sagnac effect which shifts the nulls of the internal standing wave pattern in response to angular rotation.

  4. Motion detector - Wikipedia

    en.wikipedia.org/wiki/Motion_detector

    A motion detector is an electrical device that utilizes a sensor to detect nearby motion (motion detection). Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area. They form a vital component of security, automated lighting control, home control, energy efficiency ...

  5. ALICE experiment - Wikipedia

    en.wikipedia.org/wiki/ALICE_experiment

    ALICE (A Large Ion Collider Experiment) is one of nine detector experiments at the Large Hadron Collider at CERN. The experiment is designed to study the conditions that are thought to have existed immediately after the Big Bang by measuring properties of quark-gluon plasma .

  6. Hall effect sensor - Wikipedia

    en.wikipedia.org/wiki/Hall_effect_sensor

    The sensing electrodes measure the potential difference (the Hall voltage) proportional to the axial component of the magnetic field that is perpendicular to both the current's axis and the sensing electrodes' axis. [5] Hall effect sensors respond to static and changing magnetic fields. Inductive sensors instead only respond to changes in fields.

  7. Thermography - Wikipedia

    en.wikipedia.org/wiki/Thermography

    Thermogram of a traditional building in the background and a "passive house" in the foregroundInfrared thermography (IRT), thermal video or thermal imaging, is a process where a thermal camera captures and creates an image of an object by using infrared radiation emitted from the object in a process, which are examples of infrared imaging science.