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Temperature Sensors – NTC Thermistors are widely used in a number of application fields and are relatively simple devices that measure the temperature of an object, substance, or system. The general working principle depends on the temperature coefficient of the element material. When the material is exposed to a temperature, the resistance of the material changes with the temperature, and the resistance is measured with a Wheatstone bridge or other method. With a known temperature coefficient, the temperature can be accurately calculated.

The term “thermistor” is actually an acronym which stands for “thermal resistor.” A thermistor is a type of resistor which is composed by a type of ceramic material that exhibits a change in its electrical resistance with temperature. This type of temperature sensor is based on the fact that the resistance of certain semiconductor materials changes rapidly with temperature. Its main characteristic is its small size compared to other materials, such as thermocouples, which measure temperature.

The thermistor is constructed from two types of semiconductor materials: n-type semiconductors, which have a negative temperature coefficient; and p-type semiconductors, which have a positive temperature coefficient. A thermistor with a negative temperature coefficient (NTC) is the most common, and is often used in the 2381 641 66272 application field.

NTC thermistors are suitable for measuring temperatures ranging from -55°C to +200°C. NTC’s are selected for their temperature coefficient of resistance, which is typically measurement range of -25°C to +125°C. As the temperature increases, the resistance decreases. The resistance also depends on the type of material used for the thermistor, which is generally a ceramic material.

The working principle of an NTC thermistor is based on the principle that when a material is exposed to a positive temperature change, its resistance increases or decreases. The size and shape of the device greatly affects the temperature coefficient of resistance. The NTC thermistor is connected to a Wheatstone bridge circuit consisting of four resistors, two of which can be adjusted. The bridge is powered by a voltage source and the voltage is measured across the thermistor. The voltage will change as the resistance of the thermistor changes with the temperature, allowing the temperature to be accurately measured with this device.

The NTC Thermistor is a widely used device in a number of application fields, such as air conditioning systems, automotive engines, and medical devices. It allows accurate temperature measurement and is relatively inexpensive. NTC thermistors are very efficient and durable devices that can be used for a wide range of temperature measurements.

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