thermistor

therm·is·tor

T0156600 (thûr′mĭs′tər)n. A resistor made of semiconductors having resistance that varies rapidly and predictably with temperature.

[therm(al) + (res)istor.]

thermistor

(θɜːˈmɪstə) n (Electronics) a semiconductor device having a resistance that decreases rapidly with an increase in temperature. It is used for temperature measurement, to compensate for temperature variations in a circuit, etc[C20: from thermo- + (res)istor]

therm•is•tor

(θərˈmɪs tər, ˈθɜr mə stər)

n. a resistor whose resistance decreases with increases in temperature. [1935–40; therm- + (res) istor]

Thesaurus

Noun

thermistor - a semiconductor device made of materials whose resistance varies as a function of temperature; can be used to compensate for temperature variation in other components of a circuitthermal resistorsemiconductor device, semiconductor unit, semiconductor - a conductor made with semiconducting material

Translations

thermistor

a semiconductor device having a resistance that decreases rapidly with an increase in temperature. It is used for temperature measurement, to compensate for temperature variations in a circuit, etc.

Thermistor

An electrical resistor with a relatively large negative temperature coefficient of resistance. Thermistors are useful for measuring temperature and gas flow or wind velocity. Often they are employed as bolometer elements to measure radio-frequency, microwave, and optical power. They also are used as electrical circuit components for temperature compensation, voltage regulation, circuit protection, time delay, and volume control. Thermistors are semiconducting ceramics composed of mixtures of several metal oxides. Metal electrodes or wires are attached to the ceramic material so that the thermistor resistance can be measured conveniently. See Bolometer, Electrical resistivity

At room temperature the resistance of a thermistor may typically change by several percent for a variation of 1° of temperature, but the resistance does not change linearly with temperature. The temperature coefficient of resistance of a thermistor is approximately equal to a constant divided by the square of the temperature in kelvins. The constant is equal to several thousand kelvins and is specified for a given thermistor and the temperature range of intended use.

The resistance and heat capacity of a thermistor depend upon the material composition, the physical dimensions, and the environment provided by the thermistor enclosure. Thermistors range in form from small beads and flakes less than 10^-3 in. (25 micrometers) thick to disks, rods, and washers with inch dimensions. The small beads are often coated with glass to prevent changes in composition or encased in glass probes or cartridges to prevent damage. Beads are available with room-temperature resistances ranging from less than 100 &OHgr; to tens of megohms, with heat capacities as low as tens of microwatts per degree celsius, and with time constants of less than a second. Large disks and washers have heat capacities as high as a few watts per degree Celsius and time constants of minutes. See Temperature measurement, Time constant

thermistor

[thər′mis·tər] (electronics) A resistive circuit component, having a high negative temperature coefficient of resistance, so that its resistance decreases as the temperature increases; it is a stable, compact, and rugged two-terminal ceramiclike semiconductor bead, rod, or disk. Derived from thermal resistor.

thermistor

[ther-mis´tor] a thermometer whose resistance varies with ambient temperature and so is able to measure extremely small temperature changes.

therm·is·tor

(therm'is-tŏr), A device for determining temperature; also may be used to monitor control of temperature. [G. thermē, heat]

therm·is·tor

(thĕrmis-tŏr) A device for determining temperature; also may be used to monitor control of temperature. [G. thermē, heat]

therm·is·tor

(thĕrmis-tŏr) A device for determining temperature; also used to monitor control of temperature. [G. thermē, heat]

Acronym

Definition

THERMISTOR➣Thermal Resistor

thermistor

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Thermistor

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THERMISTOR

thermistor

Synonyms for thermistor

noun a semiconductor device made of materials whose resistance varies as a function of temperature

Synonyms

Related Words