In order to determine the concentration or supersaturation in crystallization process , an online test apparatus was set up based on the relationship between the concentration and the electroconductivity at a temperature for binary electrolyte systems , which was also used in similar fields to measure the electrolyte concentration 根據二元電解質溶液體系的濃度與電導率和溫度之間的關系,建立一電導率在線測量裝置,可在一定范圍內測定溶液的濃度或過飽和度。實驗得到與hlozny等人基本一致的溶液電導率變化趨勢。