Humidity is determined by wet & dry bulb thermometers. Operation: Wet the wet bulb, the one with the sock on it, with distilled water, allow it to saturate. Hold by the handle and spin for 15 to 30 seconds, facing any air flow. When the wet bulb reads a constant temperature (may take 2 or 3 or more operations).
Dewpoint and relative humidity can be determined by reference to a Dew Point book or calculator. The dew point can be determined with the PCWI Dew Point book. PCWI Dew Point Book is available as an optional extra.
KEEP THE WICK CLEAN, do not allow it to become contaminated by touching it with your fingers.
Range: -5 to +50 degrees Celsius
Accuracy: +/- 2% RH dependent on temperature and wet bulb reading.
Please contact us to know more about this item's availability or possible restock dates.