Thygen - Model EK33 - Fog and Frost Detection System - Brochure

At the heart of the THY6AN EK33 system is a high precision, computer-controlled dew point mirror-thermohygrometer. For use in fog detection systems, this measuring principle has been refined in the past few years. THYGAN EK33 measures both air temperature and dew point temperature with very high accuracy. From these two temperatures, the relative humidity is calculated. The sensor housing is heated if there is danger of fog. When fog actually arrives, the heating causes the fog droplets to evaporate. The dew point mirror then measures the artificially increased water vapour pressure so produced. As a result, the measurement results include information concerning the fog density. The apparatus resists street air pollution: the critical internal sensor components are well protectively installed, and in addition, are cleaned on a regular basis by means of a cleaning mechanism.