Resistance Temperature Detectors (RTDs) are temperature sensors that measure temperature by correlating the resistance of the sensor element with temperature. Typically made from pure metals like platinum, RTDs exhibit a predictable change in resistance as temperature varies, making them highly accurate and stable over a wide range of temperatures. RTDs are commonly used in industrial applications, laboratories, and HVAC systems due to their precision and reliability. They are often preferred over other temperature sensors, such as thermocouples, for applications requiring high accuracy. The output from an RTD can be easily converted into temperature readings using appropriate electronic circuits.