Optical Chilled Mirror Hygrometers

These instruments thermo-electrically chill a mirror surface until dew or frost begins to form, providing the most fundamental measurement of dew or frostpoint. Formation of dew or frost is precisely monitored by an electro-optical system; measurements are traceable to national and international standards. To account for the buildup of contaminants on the mirror surface, Kahn's system incorporates Automatic Balance Compensation (ABC). Periodically, the instrument automatically heats the mirror to vaporize the accumulated dew or frost, recalibrates itself for altered reflectivity due to contaminants, then returns to normal measuring.

Optical Chilled Mirror Hygrometers