However, inappropriate storage conditions such as high relative humidity and high ambient temperature can significantly degrade the nutritive value of milk powder.
Simply comparing the dew-point temperature to the air temperature outside the bulbs -- as measured by a common weather thermometer, conveniently mounted on the hygrometer's wooden post -- gives the relative humidity.
This is achieved by careful monitoring of the relative humidity (using instruments such as a hygrometer), and applying dehumidifiers when necessary; sometimes, simple air conditioning systems may suffice.
