Temperature Transducers

A) Expansion Thermometers

1. Expansion of solids - Bimetal thermometers
2. Expansion of Liquids - Liquid in glass thermometers and Liquid in metal thermometers
3. Expansion of gases - Gas thermometers

B) FILLED SYSTEM THERMOMETERS (pressure spring thermometers)

1. Gas filled thermometers
2. Liquid filled thermometers
3. Vapor -pressure thermometers

C) Electrical Temperature Sensors

1. Resistance Temperature Detectors (RTD)
2. Thermistor
3. Thermocouples

D) Radiation Temperature sensors

1. Radiation Pyrometry
2. Optical  Pyrometry

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