Contact Temperature Sensors are temperature sensors which are required to be in physical contact with the object being sensed and use conduction to monitor changes in temperature. They can be used to detect solids, liquids or gases over a wide range of temperatures.
1. Indicator strips (moving line, Tempadot)
2. Liquid expansion (Mercury thermometer, Alcohol thermometer)
3. Dial thermometers (Bimetallic strip thermometer, Bourdon gauge thermometer)
4. FBG temperature sensors.