The HI904 coulometric Karl Fischer titrator is an automatic titration system for measuring trace amounts of water in various samples. The coulometric titrator complements our wide range of titration products designed for efficient and accurate laboratory analysis. The HI904 analyzes water content ranging from 1 ppm (mg / L) to 5%. This powerful titrator effectively monitors the Karl Fischer reaction, determines the end point, and performs all necessary calculations and graphing.