The company Saint-Gobain has installed in their drying process the dewpoint transmitter of Vaisala und controls in three drying areas the process temperatures between 150°C and 250°C. With this online-measurement is the process of the drying gypsum boards controlled.
In many cases, a new installation of a new dewpoint and humidity measurement system could be replaced to an old one, at least in the normal production, a direct measurement of moisture, which is usually proven to be very lengthy and expensive.
For calibration Mr. DI Beitzke uses the HMK15 humidity calibrator. The HMK15 is a portable calibration system that was developed for field use.