Thermistor

A thermistor is a type of resistor whose resistance varies significantly with temperature, more so than in standard resistors. The word is a portmanteau of thermal and resistor. Thermistors are widely used as inrush current limiters, temperature sensors, self-resetting overcurrent protectors, and self-regulating heating elements.

Thermistors differ from resistance temperature detectors (RTD) in that the material used in a thermistor is generally a ceramic or polymer, while RTDs use pure metals. The temperature response is also different; RTDs are useful over larger temperature ranges, while thermistors typically achieve a higher precision within a limited temperature range, typically −90 °C to 130 °C.

Read more about ThermistorBasic Operation, Steinhart–Hart Equation, B or β Parameter Equation, Conduction Model, Self-heating Effects, Applications, History

Other articles related to "thermistor, thermistors":

Thermistor - History
... The first NTC thermistor was discovered in 1833 by Michael Faraday, who reported on the semiconducting behavior of silver sulfide ... Because early thermistors were difficult to produce and applications for the technology were limited, commercial production of thermistors did not begin until ... The thermistor was invented by Samuel Ruben in 1930 ...
Microwave Power Meter - Thermal
... main categories, thermocouple power sensors and thermistor-based power sensors ... Thermistor-based power sensors such as the Agilent 8478B are generally only used in situations where their excellent linearity is important, as they are both much slower and have a smaller dynamic range ...
Pulmonary Artery Catheter - Technical Developments - Thermal Dilution
... Swan developed the initial balloon tip, Ganz used Fronek's idea and added a small thermistor (temperature probe) about 3 cm behind the tip ... As this cooler fluid passes the tip thermistor, a very brief drop in the blood temperature is recorded ... both the injector site and the ventricular thermistor to a small computer, the thermodilution curve can be plotted ...
Inrush Current Limiter - Thermistor
... An NTC thermistor's resistance is high at low temperatures ... When the circuit is closed, the thermistor's resistance limits the initial current ... After some time current flow heats the thermistor, and its resistance changes to a lower value, allowing current to flow uninterrupted ...
Inrush Current Limiter - Selection Consideration
... •IMax - The first critical consideration in the selection of a thermistor is the maximum steady state current (AC or DC) of the power supply ... thermistor are rated for maximum continuous current ... Therefore, the thermistor must have an IMAX rating of at least 1.2 Amps ...