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
Predictable and repeatable resistance–temperature relationship
High accuracy and long-term stability
Resistance increases linearly with temperature
Passive device requiring external excitation current
Suitable for precise temperature measurement in various environments
Applications
Industrial process temperature monitoring
Laboratory testing and calibration
HVAC, refrigeration, and climate control systems
Chemical, petrochemical, and pharmaceutical industries