Thermal calibration refers to the calibration of any device used in a system that measures temperature. Most importantly, this usually means the temperature sensor, itself, which is typically a platinum resistance thermometer (PRT or PT-100), thermistor, or thermocouple.

Temp. Sensors (RTDS/TC/Thermistors) Walk-in chembers
Temperature Recorders Refrigerators
Indicators Glass Thermometers
Baths Data logger
Furnaces Data acquisition systems
Environmental Chembers scanners etc.
Ovens Humidity sensors with or without indicators
Deep freezers Humidity Generators / Chember/ Calibrators
Incubators Temperature Transmitters
Controllers Humidity Transmitters
Gauges -