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6. Glossary
Humidité absolue; absolute humidity
This is the ratio of the mass of water vapor to the total volume of humid air.
Humidité relative; relative humidity
This is the ratio of the partial pressure of water vapor to the partial pressure of water vapor in saturated humid air at the same pressure and temperature.
Humidité spécifique; specific humidity
This is the ratio of the mass of water vapor to the mass of humid air in which the water vapor is contained.
Pression de vapeur saturante; saturation vapor pressure
This is the vapor pressure in a state of indifferent equilibrium with a flat surface of liquid water or ice at the same temperature and pressure. In other words, it's the maximum value that the partial pressure...
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Glossary
Bibliography
Standardization
French Standards Association (Afnor)
- Air humidity measurement – Hygrometric parameters - NF X 15-110 - 07-94
- Thermal Environmental Conditions for Human Occupancy - ASHRAE Std 55 - 2004
American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE)
Directory
Hygrometer manufacturers (non-exhaustive list)
Condensation hygrometers
EdgeTech (United States) http://www.edgetechinstruments.com
General Eastern (United States) http://www.gemeasurement.com
...
Organizations
Scientific and Technical Committee for the Climate Industries (COSTIC) http://www.costic.com
Center technique des industries aérauliques et thermiques (CETIAT) http://www.cetiat.fr
Association of Climate, Ventilation and Refrigeration Engineers...
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