Automatic control system for standard radon chamber

Stringent control of temperature, moisture and wind speed in measurement environment is crucial to establish standard radon chamber. This article describes the control principle, software/hardware structure and system design idea of automatic control system for standard radon chamber. This system makes possible automatic control of radon chamber temperature, automatic detection of radon/progeny and recording of data in the whole process of experiment and measurement. It has been proven that this system has good results with expectant design aims being achieved. (authors)