The AquaGraph Program provides the users of Stevens / Greenspan smart sensors (PS 310, CS 304, CTD 350, CTDP 300, DO 300, EC 350, pH 300, and TS 300) a data management and analysis tool utilizing the historical logged data retrieved from the sensors using SmartCom for Windows. The user can graph multiple variables for a visual correlation analysis or in analyze data in a tabular format. Also, data can be exported in a .txt format or to MicroSoft Excel.