Environmental Concerns:

Ambient temperature variations will affect the accuracy and reliability of temperature detection instrumentation. Variations in ambient temperature could directly affect the resistance of components in a bridge circuit and the resistance of the reference junction for a thermocouple. Further, ambient temperature variations could affect the calibration of electric/electronic equipment.  An effect of temperature variations are reduced through the design of the circuitry and through managing the temperature detection instrumentation in the proper environment.

The presence of humidity will also affect most electrical equipment and especially electronic equipment. A High humidity causes moisture to collect on the equipment. This moisture could cause short circuits, grounds, and corrosion that, in turn, might damage components.  The effects due to humidity are controlled through managing the equipment in the proper environment.