These instruments are designed to determine the dewpoint and relative humidity at any given time. The Elcometer 116A Whirling Hygrometer is available in Celsius scale. A guide for Relative Humidity (RH) determination is supplied with each instrument and the dewpoint can accurately be obtained using the Elcometer 114 Dewpoint Calculator. The Elcometer 116C Sling Hygrometer, shown as the black unit in the photograph, is a convenient, self contained instrument with an inbuilt slide rule for the calculation of %RH and dewpoint. It has spirit filled thermometers and is available in °C or °F scales.

• Manual operation, no power supply required
• Spirit filled thermometers

• Elcometer 116 Whirling Hygrometer or Elcometer 116 Sling Hygrometer
• Slide rule table
• Operating instructions