The WaterPOINT 870 hand-held water analysis system reduces calibration time, improving precision, correlation and temperature compensation and overall accuracy. A variety of sensor configurations are offered, allowing users to choose the right test kit for their application, such as ISE, monochloramine or free chlorine. Additionally, a timer makes timing colorimetric measurement incubation periods easier, and a count-up timer allows users to monitor colorimetric test procedures. Enabling multiple tests to be performed simultaneously, the counter also permits users to conduct tests concurrently instead of consecutively.