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Temperature Sensors – NTC Thermistors

Temperature sensors are indispensable components in automation systems, where they are used to measure, monitor, and regulate the temperature of various systems and products. NTC thermistors are one type of temperature sensor, and they have a wide variety of applications. This article will discuss the applications and working principle of NTC thermistors.

Applications of NTC Thermistors

NTC thermistors are used in a wide range of applications, including HVAC systems, thermostats, medical equipment, home appliances, automotive systems, and industrial equipment. NTC thermistors are also used in laboratories and research facilities to test and calibrate the performance of various components and systems, as well as for measuring temperature in industrial processes and for safety purposes.

NTC thermistors are best suited for applications requiring high accuracy and accuracy at extreme temperatures. They are most commonly used in equipment with operating temperatures of -50°C to 350°C. Due to their stability, NTC thermistors can be used in extreme conditions, such as high-voltage conditions. NTC thermistors can also be used in high-vibration and shock environments. In addition, NTC thermistors are ideal for precise measurements of temperature changes over time.

Due to their high precision, NTC thermistors are used in both safety and non-safety-critical applications. For example, they are used to monitor the temperature of electrical and electronic circuits in order to ensure proper functioning of the circuitry. In addition, they are used in medical equipment to monitor body temperature and ensure patient safety.

Working Principle of NTC thermistors

The basis of the NTC thermistor’s operation is its ability to resist a change in temperature. An NTC thermistor is a type of device known as a thermally sensitive resistor. It consists of a metal film resistor that is made from a semiconductor material. This material has a negative temperature coefficient, which means that as the temperature decreases, its resistance increases. For this reason, when an NTC thermistor is exposed to a change in temperature, its resistance changes accordingly.

When an electrical current is applied to an NTC thermistor, the resistance of the device increases as the temperature decreases. Conversely, the resistance of the thermistor decreases as the temperature increases. This change in resistance is used to measure the temperature of the device. NTC thermistors are often used in combination with RTDs (resistance temperature detectors) and thermocouples in order to create an accurate temperature measurement.

NTC thermistors can also be used to measure temperature over a wide range of temperatures, ranging from -50°C to 350°C. This makes them particularly suitable for applications where extreme temperatures are expected. NTC thermistors are also not affected by temperature drifts, which makes them an ideal choice for precise temperature control. NTC thermistors are also highly stable, making them an ideal choice for applications requiring strict accuracy.

Conclusion

NTC thermistors are a type of temperature sensor that are used in a wide range of applications. They have a negative temperature coefficient, which means that their resistance increases as the temperature decreases. NTC thermistors are most commonly used in applications with operating temperatures of -50°C to 350°C, and they can be used in combination with other temperature sensors such as RTDs and thermocouples for accurate temperature measurement. NTC thermistors are highly accurate and stable, making them ideal for applications requiring precise temperature control.

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