Psychrometers

In a psychrometer, two temperature sensing elements are exposed to a stream of air; they are usually platinum resistance elements or mercury-in-glass thermometers. One of the elements (the wet bulb) is covered by a closely fit sleeve of a material such as cotton, which is thoroughly moistened with water. The other element (the dry bulb) is uncovered and dry. The wet and dry temperatures are used to compute the relative humidity.

Electronic psychrometers contain electric thermometers and usually incorporate a processor so the relative humidity can be calculated from the dry and wet element temperatures and displayed.

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

Calibration charges