几个小时后，饱和盐溶液周围的空气空间将达到不同盐的平衡相对湿度。因此，饱和盐溶液可用于控制小室内的相对湿度，以及检查电子湿度传感器的准确性。 选择表1中列出的盐是因为它们对温度变化相对不敏感。其他盐的值可以在大多数化学手册中找到。

The air space immediately surrounding a saturated salt solution will, after several hours, achieve an equilibrium relative humidity that is different for different salts. Hence, saturated salt solutions are useful for controlling relative humidity in small chambers, and for checking the accuracy of electronic humidity sensors. The salts listed in Table 1 have been selected because of their relative insensitivity to temperature changes. Values for other salts can be found in most chemistry handbooks.