The Hach Ultraturb sensor is Hach’s most versatile turbidimeter. With its wide measurement range (0-1,000 NTU) and optional automatic cleaning system, the Ultraturb is well suited for everything from filter effluent and distribution systems to raw water monitoring. The Ultraturb uses a ratio methodology with 90° and 180° in a pressurized sample chamber to achieve a high degree of accuracy over its wide measurement range.