PRESSURE DEW POINT MEASUREMENT WITH CCC*-SENSOR

A. Steinke, B. March, B. Prümm, H. Hansch

Abstract

Humidity in compressed air is one of the most important problems in industrial and non industrial processes. The compressed air contains humidity despite of the drying process realized by the refrigeration dryer. The reason for that are located in the uncompleted separation process or in leaks along the compressed air pipes. For reasons of the energy and quality management a multiplicity of measurement principles has been developed for this application. But these technical and economical demands require more and more humidity measurement sensors with higher accuracy and long term stability. The best solution would be a direct and absolute humidity measurement system. It can be stated generally that the dew point principle is a (absolute measurement of humidity) favourable solution for such problems due to the measurement at the equilibrium state of condensation and evaporation. The developed monolithic integrated CCC*-dew point sensor bases on this thermodynamic principle and utilizes as a typical microsystem the cost advantages of the batch processes. This paper describes the most innovative CCC*- dew point sensor which is specified for the measurement of the pressure dew point temperature.

Keywords

humidity, dew point, compressed air

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IMEKO-WC-2000-ST-P475.pdf

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