A temperature sensor is a device that measures temperature. There are many different types of temperature sensors, each with its own advantages and disadvantages. The most common type of temperature sensor is the thermocouple. Thermocouples are made of two different metals that are joined together at one end. When the two metals are at different temperatures, a small voltage is generated. This voltage can be measured to determine the temperature difference between the two metals. Thermocouples are very accurate and can measure a wide range of temperatures. However, they are also very sensitive to vibration and noise.
Another type of temperature sensor is the resistance temperature detector (RTD). RTDs are made of a material that has a very high resistance to electricity. The resistance of the RTD changes with temperature. RTDs are very accurate and are not affected by noise or vibration. However, they are not as widely used as thermocouples because they are more expensive.
Thermistors are another type of temperature sensor. Thermistors are made of a material that has a very high resistance to electricity. The resistance of the thermistor decreases as the temperature increases. Thermistors are less accurate than thermocouples and RTDs, but they are much less expensive. Thermistors are also very small, which makes them ideal for use in electronic devices.
Temperature sensors are used in a variety of applications, including HVAC systems, automotive engines, and industrial processes