Environmental Concerns:

Density of the fluid whose level is to be measured can have a large effect on level detection instrumentation. This primarily affects level sensing instruments that utilize a wet reference leg. Within these instruments, it is probable for the reference leg temperature to be different from the temperature of the fluid whose level is to be measured.  An instance of this is the level detection instrumentation for a boiler steam drum. Water in the reference leg is at a lower temperature than the water in the steam drum. Thus, it is denser, and has to be compensated for to ensure the denoted steam drum level is accurately indicated.

Ambient temperature variations will affect the accuracy and reliability of level detection instrumentation. A Variation in ambient temperature could directly affect the resistance of components in the instrumentation circuitry, and, thus, affect the calibration of electric/electronic equipment. An effect of temperature variations are decreased through the design of the circuitry and through managing the level detection instrumentation in the proper environment.

The presence of humidity will also affect most electrical equipment especially electronic equipment. A High humidity causes moisture to collect on the equipment. That moisture can cause short circuits, grounds, and corrosion that, in turn, might damage elements. The effects because of to humidity are controlled through maintaining the equipment in the proper environment.