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  2. Thermistor - Wikipedia

    en.wikipedia.org/wiki/Thermistor

    NTC thermistors are widely used as inrush-current limiters and temperature sensors, while PTC thermistors are used as self-resetting overcurrent protectors and self-regulating heating elements. An operational temperature range of a thermistor is dependent on the probe type and is typically between −100 and 300 °C (−148 and 572 °F).

  3. Varistor - Wikipedia

    en.wikipedia.org/wiki/Varistor

    Modern varistor schematic symbol, which is the same as a thermistor symbol [1] A varistor (a.k.a. voltage-dependent resistor (VDR)) is a surge protecting electronic component with an electrical resistance that varies with the applied voltage. [2] It has a nonlinear, non-ohmic current–voltage characteristic that is similar to that of a diode ...

  4. File:Thermistor.svg - Wikipedia

    en.wikipedia.org/wiki/File:Thermistor.svg

    The following other wikis use this file: Usage on anp.wikipedia.org थर्मिस्टर; Usage on az.wikipedia.org Termistor; Usage on bn.wikipedia.org

  5. Variometer - Wikipedia

    en.wikipedia.org/wiki/Variometer

    The vane variometer consists of a rotating vane, centered by a coil spring, dividing a chamber into two parts, one connected to a static port, and the other to an expansion chamber. Electric variometers use thermistors sensitive to airflow, or circuit boards consisting of variable resistors connected to the membrane of a tiny vacuum cavity.

  6. List of measuring instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_measuring_instruments

    Thermistors principle: relation between temperature and electrical resistance of ceramics or polymers, range: from about 0.01 to 2,000 kelvins (−273.14 to 1,700 °C) Thermocouples principle: relation between temperature and voltage of metal junctions ( Seebeck effect ), range: from about −200 °C to +1350 °C

  7. Thermometer - Wikipedia

    en.wikipedia.org/wiki/Thermometer

    The first clear diagram of a thermoscope was published in 1617 by Giuseppe Biancani (1566 – 1624); [2]: 10 the first showing a scale and thus constituting a thermometer was by Santorio Santorio in 1625. [5] This was a vertical tube, closed by a bulb of air at the top, with the lower end opening into a vessel of water.

  8. Self-regulating heater - Wikipedia

    en.wikipedia.org/wiki/Self-regulating_heater

    Since PTC heating elements are a kind of thermistor, they share the same principles of operation. The details depend on the type of material, but a class of materials widely used are crystalline ceramics. During manufacture, dopants are added to give the material semiconductor properties. These materials have somewhat negative temperature ...

  9. Thermopile - Wikipedia

    en.wikipedia.org/wiki/Thermopile

    Diagram of a differential temperature thermopile with two sets of thermocouple pairs connected in series. The two top thermocouple junctions are at temperature T 1 while the two bottom thermocouple junctions are at temperature T 2.