Using Chilled Mirror Hygrometry (CMH) to Accurately and Easily Measure the Efficiency of Desiccants
The article explains how head space analysis can be used to determine desiccant efficiency since the moisture content of all materials are in equilibrium with their surroundings.
Three fourths of the planet is covered by water, and it comprises a significant component of the Earth’s atmosphere, all of which will affect the rate of warming of the planet. For the above reasons, and more, the measurement and control of water vapor, the humidity, is widely practiced.
Technologies that measure water vapor concentration are based on electrical, mass, and spectroscopic changes. Each technology has its advantages and disadvantages with regards to concentration range of measurement, accuracy, precision and cost.
Of all the technologies available, Chilled Mirror Hygrometry (CMH) is unique owing to its high accuracy and repeatability over a wide dynamic range of measurement. CMH is recognized as a fundamental standard and as such is used in national standards laboratories throughout the world, as well as industrial metrology laboratories.
One can determine water content of a system by measuring headspace humidity because water vapor is in equilibrium with its separate phases. Applying CMH to the measurement of the drying efficiency of desiccants is an ideal system to demonstrate the utility of CMH.
Read the full article at Harnessing Humidity with Chilled Mirror Hygrometry
