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==Units== The units used for pressure are hPa (hecto Pascals, although not a System International unit because of its prefix, this is used by meterorologists in much of the world) or mb (millibars, this is the equivalent used for public communications), but mmHg (millimetres of mercury, not used now), kPa (kiloPascals, used in Canada), inHg (inches of mercury, used in USA and by some UK instruments) are alternatives. ~~Cumulus [[cumulus.ini\|supports]]:~~ Alternatives units are mb (millibars, this is the equivalent used for public communications, but its scientific definition has varied from 101,325 Pa to (from 1982) 100,000 Pa), mmHg (millimetres of mercury, strictly a function of temperature and gravitational force as well as atmospheric pressure, abandoned in 1929), torr (now defined as exactly 1/760 of a standard atmosphere, almost equivalent to mmHg, but mmHg varies by temperature and gravitational strength), kPa (kiloPascals is a SI unit, used in Canada), inHg (inches of mercury, used in USA and by some UK instruments, but strictly a function of temperature and gravitational force as well as atmospheric pressure) are alternatives. Cumulus [[cumulus.ini\|supports]]: 0 = mb (millibars) 1 = hPa (hectoPascals)

Pressure Measurement: Difference between revisions

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