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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. 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 ...

  4. Smart thermostat - Wikipedia

    en.wikipedia.org/wiki/Smart_thermostat

    In the case that the home is not occupied, the thermostat can suspend heating/cooling until the sensor is reactivated by an occupant. This sensor is also used to determine the occupancy patterns to create the auto schedule. A grille member is placed in front of the sensor to visually conceal and protect the PIR motion sensor inside the thermostat.

  5. Security alarm - Wikipedia

    en.wikipedia.org/wiki/Security_alarm

    Security alarm. A security alarm is a system designed to detect intrusions, such as unauthorized entry, into a building or other areas, such as a home or school. Security alarms protect against burglary (theft) or property damage, as well as against intruders. Examples include personal systems, neighborhood security alerts, car alarms, and ...

  6. Occupancy sensor - Wikipedia

    en.wikipedia.org/wiki/Occupancy_sensor

    An occupancy sensor is an indoor device used to detect the presence of a person. Applications include automatic adjustment of lights or temperature or ventilation systems in response to the quantity of people present. The sensors typically use infrared, ultrasonic, microwave, or other technology. The term encompasses devices as different as PIR ...

  7. 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.

  8. Infrared detector - Wikipedia

    en.wikipedia.org/wiki/Infrared_detector

    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.

  9. List of wireless sensor nodes - Wikipedia

    en.wikipedia.org/wiki/List_of_wireless_sensor_nodes

    Motion Acoustic Others Length Width Height Voltage Sleep Nominal Radio RX Radio TX PoUSB OTAP SDK RAM Program Memory Data Memory Flash HTTP UDP TCP IPv4 IPv6 RPL CoAP API Others .NOW Archived 2016-03-06 at the Wayback Machine: The Samraksh Company: US$125: 2012: RISC: ARM 32 bit Cortex M3 STM32F103: 8-48 MHz: 32.768 kHz: Partial: Future

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