The Dew Point Calculator can be used in conjunction with the Whirling Hydrometer (or an electronic temperature and relative humidity meter) to calculate the prevailing dew point temperature quickly, easily, and economically.
Accurate dew point temperature information is important to ensure that the substrate temperature remains above the prevailing dew point thus avoiding condensation on the substrate. The is easy to use to establish the dew point: once the temperature readings have been recorded from the Whirling Hydrometer. Determine the dew point by putting the dry bulb temperature (upper white scale 1) against the wet bulb temperature (upper black scale). Read the dew point in window 2 against the earlier determined wet bulb temperature.