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  2. Heat detector - Wikipedia

    en.wikipedia.org/wiki/Heat_detector

    A residential heat detector. A heat detector is a fire alarm device designed to respond when the convected thermal energy of a fire increases the temperature of a heat sensitive element. The thermal mass and conductivity of the element regulate the rate flow of heat into the element. All heat detectors have this thermal lag. Heat detectors have ...

  3. Linear heat detection - Wikipedia

    en.wikipedia.org/wiki/Linear_Heat_Detection

    Linear heat detection (LHD) cable is essentially a two-core cable terminated by an end-of-line resistor (resistance varies with application). The two cores are separated by a polymer plastic, that is designed to melt at a specific temperature (commonly 68 °C for building applications [1]), and without which causes the two cores to short.

  4. Thermopile - Wikipedia

    en.wikipedia.org/wiki/Thermopile

    Picture of a heat flux sensor that utilizes a thermopile construction to directly measure heat flux. Model shown is the FluxTeq PHFS-01 heat flux sensor. Voltage output is passively induced from the thermopile proportional to the heat flux through the sensor or similarly the temperature difference across the thin-film substrate and number of ...

  5. Thermopile laser sensor - Wikipedia

    en.wikipedia.org/wiki/Thermopile_laser_sensor

    In this method of cooling the heat is actively transferred to the environment. This is usually done by mounting a fan on the heat sink of a passively cooled detector or by pumping water through a channel system to cool the sensor. The preferred choice depends on the amount of heat to be dissipated and thus on the detector power.

  6. Thermal imaging camera - Wikipedia

    en.wikipedia.org/wiki/Thermal_imaging_camera

    A handheld thermal imaging camera. A thermal imaging camera consists of five components: an optic system, detector, amplifier, signal processing, and display. [1] Fire-service specific thermal imaging cameras incorporate these components in a heat-resistant, [2] ruggedized, and waterproof housing. [3]

  7. Bolometer - Wikipedia

    en.wikipedia.org/wiki/Bolometer

    A microbolometer is a specific type of bolometer used as a detector in a thermal camera. It is a grid of vanadium oxide or amorphous silicon heat sensors atop a corresponding grid of silicon. Infrared radiation from a specific range of wavelengths strikes the vanadium oxide or amorphous silicon, and changes its electrical resistance. This ...

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