What device is a thermistor commonly used for?

A thermistor is primarily used for temperature sensing and control due to its significant sensitivity to temperature changes. It is a type of resistor whose resistance varies considerably with temperature. This property makes thermistors particularly useful in various applications, including temperature measurement in thermometers, temperature compensation in circuits, and as part of temperature control systems in appliances such as refrigerators and air conditioners.

The operation of a thermistor relies on the relationship between temperature and resistance, allowing for precise readings and adjustments based on temperature changes. When temperature increases, the resistance of a negative temperature coefficient (NTC) thermistor decreases, while a positive temperature coefficient (PTC) thermistor exhibits the opposite behavior. This enables the thermistor to effectively monitor temperature and provide feedback for control systems to maintain desired temperature ranges.

Other devices, like those used for measuring current, voltage regulation, or power generation, do not capitalize on the specific characteristics of thermistors and their temperature sensitivity. In these contexts, different types of sensors or components would be employed to achieve the desired functionality.