Pressure calibration is the comparison of the output of a device used to measure pressure with that of another pressure measurement device, or pressure measurement standard.  The outputs of the devices are compared at one or more pressures, typically from the lowest to highest readings of the DUT’s full scale range, or the range for which it is normally used.

Calibration of gas detectors is done using an internal menu within the gas detector. This requires an exact blend of calibration gas to re-establish the accuracy of the sensor or sensors of the gas detector. Calibration of gas detectors ensures the gas detector works accurately. It is important to check the expiry date of the calibration gas before starting a calibration. 

Temperature 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. Readings from these thermometers are made by “thermometer readout” devices which measure their electrical outputs and convert them to temperature