Labtron TSS Meter tests suspended solids concentrations across a measurement range starting at 0.01 mg/L, with selectable ranges up to 120,000 mg/L. Infrared double-scattering technology limits the influence of water color on readings. Sample and slope calibration support measurement adjustment for different water conditions. Manufactured for wastewater testing and water quality assessment, this total suspended solids tester serves environmental monitoring and sewage treatment applications.