Data Acquisition Web

Temperature sensors infer temperature by featuring some change in a physical characteristic. Temperature can be measured using many kinds of sensors. Six major types with which the engineer is likely to come into contact are:

1. Thermocouples
2. Resistance Temperature Devices (RTD’s and Thermistors)
3. Infrared Radiation sensors
4. Bimetallic devices
5. Liquid expansion devices
6. Change-of-state sensors

Other temperature measurement techniques exist such as gas, vapor pressure, acoustic, noise, and magnetic susceptibility thermometry. They either require great effort to implement or a severely constrained system design.