Historical
ANSI/ASHRAE Standard 41.6-2014
Standard Method for Humidity Measurement
This standard applies to the measurement of humidity of moist air from sea level to 3048 m (10,000 ft), within the dry bulb temperature range of –50°C to 160°C (–58°F to 320°F),and within the dew-point temperature range of –50°C to 99°C(–58°F to 210°F).2.2
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. [ashrae]