Slide rule has two sides to humidity calculation
A
Michell Instruments product story
Edited by the Engineeringtalk editorial team
Feb 13, 2007
Free slide rule provides the user with a fast, clear and simple method for calculating absolute and relative humidity.
Michell Instruments has produced an absolute humidity and relative humidity slide rule.
It was made with the customer in mind and provides the user with a fast, clear and simple slide-rule formula.
The useful tool also includes practical definitions and equations such as the equation for parts-per-million-vapour and the way of calculating a given saturation vapour pressure.
The front, Michell side of the slide rule calculates absolute humidity allowing the user to align measured dewpoint value with the operating pressure and then read the moisture content (parts-per-million vapour) clearly and concisely.
The user can then reverse the process to calculate dewpoint at pressure from parts-per-million vapour.
The reverse, or Rense side of the calculator allows the user to set temperature (Celsius or Fahrenheit) at a given relative humidity and then calculate the dewpoint.
This process can then be reversed to calculate percentage relative humidity at temperature from dewpoint.
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Contact Michell Instruments
Tel +44 1353 658000
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