Resistance Temperature Detectors:
> Contact
Resistance Temperature Detectors or RTD's are wire wound and thin film devices that measure temperature because of the physical principle of the positive temperature coefficient of electrical resistance of metals. The hotter they become, the larger or higher the value of their electrical resistance.
Types of Contact Sensors
Resistance Temperature Detectors or RTD's
Other Contact Sensors:
Filled System Thermometers
Bimetallic Thermometers
Semiconductor Temperature Sensors