An RTD (Resistance Temperature Detector) is a sensor whose resistance changes as its temperature changes. The resistance increases as the temperature of the sensor increases. The resistance vs temperature relationship is well known and is repeatable over time. An RTD is a passive device.
Key Features
High accuracy and excellent repeatability
Predictable and stable resistance vs temperature characteristics
Long-term measurement stability with minimal drift
Passive sensor design ensures reliable operation
Good linearity over a wide temperature range
Less susceptible to electrical noise than thermocouples
Available in standard types such as PT100 and PT1000
Easy integration with transmitters and control systems