Electronic Relative Humidity Instruments

Over the years devices other than the wet and dry bulb psychrometer have evolved which permit a direct measurement of relative humidity. These sensors are, for the most part, electrochemical sensors which offer a degree of ruggedness, compactness and electronic readout ability.

The two most widely used electronic relative humidity sensors are the lithium chloride condensation sensor and the electric-impedance humidity sensor.

These sensors are calibrated by comparing against the Laboratory standards at the specified sets of temperature and humidity condition.

Battery operated units must be submitted with batteries which are in good working condition, and fully charged. It is advisable to submit the battery charger or AC/DC adaptor as well.

Calibration charges