Contact temperature sensors measure their own temperature.

 

contact temperature sensor iconsOne infers the temperature of the object to which the sensor is in contact by assuming or knowing that the two are in thermal equilibrium, that is, there is no heat flow between them.

There are many different types, some with extensive histories of use and a large repository of performance and use standards.

Learn more details at About Temperature & Moisture Sensors at: www.temperatures.com/sensors/csensors/