Michell’s new humidity calculator makes moisture conversions quick and simple to do

A new humidity calculator is now available from Michell Instruments’ website for download and online use.
The free tool enables engineers to make humidity calculations and parameter conversions quickly and easily. It has been designed to be used as either a stand-alone tool or in conjunction with a hygrometer.

Among the uses for the application are:
  • Calculating humidity values at different pressures
  • Calculating parameters that are not available on a particular instrument
  • Converting previously measured data to alternative parameters.

The calculator is based on the formula found in British Standard BS1339-1, enabling the user to calculate any one of the following parameters with confidence:
  • Dew Point temperature
  • Frost Point temperature
  • Relative humidity
  • Absolute humidity
  • Parts per million (volume)
  • Parts per million (weight)
  • Mixing ratio
  • Wet bulb temperature
  • Water vapour pressure & saturation vapour pressure
  • Enthalpy

Users can customise the settings to change which parameters are shown and alter the order, to ensure complete ease of use.

A separate natural gas moisture calculator allows calculation of water dew-points in natural gas from ppmV and absolute humidity (mg/m3, g/3, kg/m3, lb/MMscf) and vice versa. These calculations are based on methods found in ISO 18453 and IGT Bulletin #8.

The online version of the calculator supports all major browsers (IE9+) and also works with Android, iOS and most other mobile devices.

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Date: 4 June 2015
Ref : 183
Written & issued by Michell Instruments Ltd.