ASHRAE标准41.6规定了使用仪器测量湿空气湿度的方法。该标准的2021版包括一种改进的方法，用于确定何时实现了数据记录的稳态操作，改变以使更高层标准更容易地参照该标准，以及根据最新的不确定性方法制备的新的不确定性示例。

ASHRAE Standard 41.6 prescribes methods for measuring the humidity of moist air with instruments.The 2021 edition of the standard includes an improved method for determining when steady-state operation has been achieved for data recording, changes to make it easier for higher-tier standards to adopt this standard by reference, and a new uncertainty example prepared in accordance with the latest uncertainty methods.