Here's a breakdown of different types:

Common Types:

* Liquid-in-glass thermometer: Contains a liquid (usually mercury or alcohol) that expands and contracts with temperature changes, indicating the temperature on a calibrated scale.

* Digital thermometer: Uses a sensor (thermistor or thermocouple) to measure temperature and displays the reading digitally.

* Infrared thermometer (non-contact): Measures temperature by detecting infrared radiation emitted by an object.

Other Types:

* Thermocouple: A type of sensor that measures temperature by generating a voltage proportional to the temperature difference between two dissimilar metals.

* Resistance Temperature Detector (RTD): A sensor whose electrical resistance changes with temperature.

* Thermistor: A type of resistor whose resistance changes significantly with temperature.

The type of thermometer used depends on the specific application and the required accuracy.