Michell Instruments Inc., Danbury, CT, offers its Optidew range of chilled mirror hygrometers with Frost Assurance System Technology (FAST) to ensure that the dew point reading is derived from ice crystals, rather than water droplets, for temperatures below 0°C. The hygrometers give moisture readings down to –40°C dew point. FAST controls and adjusts the mirror temperature to avoid errors caused by super-cooled water condensing at a slightly different temperature from normal ice formation.
Chilled Mirror Hygrometer from Michell Instruments
Michell Instruments Inc.