Where are NTC thermistors primarily used?
Release Date:
2022-10-14
Author:
A thermistor is a temperature‑sensitive resistor. The name derives from the more descriptive term “thermally sensitive resistor.” It is generally accepted in the industry that thermistors were first discovered by Michael Faraday in 1833, although commercially available thermistors were not manufactured until the 1930s. Today, thermistors are widely used in a variety of electronic applications, particularly as temperature sensors. Additional applications include current limiters, overcurrent protectors, and heating elements.
A thermistor is a type of semiconductor, meaning it exhibits higher resistance than conductive materials but lower resistance than insulating materials. The relationship between a thermistor’s temperature and its resistance is highly dependent on the material from which it is made. Manufacturers typically characterize this property with high precision, as it is the primary parameter of interest to thermistor buyers.
Comparison of NTC Thermistors and RTDs
Compared with RTDs, which exhibit nearly linear resistance changes, NTC thermistors show highly nonlinear resistance variations and actually decrease in resistance as temperature rises. The primary reasons thermistors are widely used for temperature measurement are:
1. The greater change in resistance at each temperature provides higher resolution.
2. High levels of repeatability and stability
3. Good interchangeability
4. Small size means a rapid response to temperature changes.
Thermistor chip encapsulation coatings typically include:
1. Epoxy coatings intended for use at lower temperatures [typically ranging from -50 to 150°C (-58 to 316°F)]
2. Glass coatings for higher-temperature applications [typically ranging from −50 to 300°C (−58 to 572°F)]
3. These coatings are used to protect the thermistor chip and wire connections, while also providing some protection against moisture or corrosion.
4. Thermistors are typically supplied with very small-diameter solid copper or copper-alloy wire (#32 AWG, or 0.008 inches in diameter); under normal conditions, the wire is tinned to facilitate soldering.
Huizhou Jin Yuan Xiang Electronic Co., Ltd. It is a high-tech enterprise that manufactures NTC thermistor NTC temperature sensor Temperature probes. Feel free to request a quote with product images. Free samples are available. For more information on NTC thermistors, please visit our website at www.jyx-sensor.cn. If you have any questions, please contact our team for assistance.
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