The portable turbidimeter TB1 measures the turbidity of aqueous samples simply and accurately. High quality, intuitive and simple to calibrate, the TB1 offers premium results in a matter of seconds, directly in Nephelometric Turbidity Units (NTU). The TB1 is supplied with 4 calibration standards (800, 100, 20 and 0.02 NTU), NIST traceable, 3 vials, cloth, silicone oil, batteries and carrying case.