TURBIDITY METER The microprocessor-based waterproof TN-100 meter is an easy-to-use turbidimeter that meets the rigor of rugged field applications. It is a "must -have" for anyone monitoring turbidity on the go. Using an Infrared light source, it delivers laboratory accuracy with a resolution of 0.01 NTU across an extended range of up to 20 NTU (Nephelometric Turbidity Units). Product Features ::    IP67 Waterproof and Dustproof - Cleaning and maintenance is simple. It floats! ::    Automatic Push-Button Calibration (4 points) for unprecedented full-range accuracy ::    Sturdy Carrying Kit complete with 4 calibration standards, 3 empty cuvettes, batteries and comprehensive instruction manual      ::    Power-saving feature allows over 1200 measurements to be taken with a single set of AAA alkaline batteries       ::    Large Easy-to-Read Display for optimum viewing of measurements with user-friendly message codes for easy troubleshooting      ::    Meets Performance Criteria as specified by ISO 7027 (DIN EN 27027) method Product Specification Description Measuring Parameter    Turbidity Highlights    Light weight, IP67 waterproof meter Principle    Nephelometric non-ratio / ISO 7027 and DIN 27027 compliant Range     0 to 2000 NTU Automatic Range Selection     0.01 to 19.99 NTU;  20.0 to 99.9 NTU;  100 to 2000 NTU Resolution    0.01 NTU (0 to 19.99 NTU);  0.1 NTU (20.0 to 99.9 NTU);  1 NTU (100 to 2000 NTU) Accuracy    < 0.1 NTU for 0.02 NTU standard;  ±2 % of reading ±1 digit for 0 to 500 NTU;  ±3 % of reading ±1 digit for 501 to 2000 NTU Repeatability    < or = ±1 % of reading Calibration    Up to 4 points Calibration Standards    0.02 NTU, 20.0 NTU, 100 NTU, 800 NTU Response Time    < 6 secs for full step change Sample Volume    10 mL Light Source    Infrared-emitting diode (850 nm wavelength) Operating Temperature Range    0 to 50 ºC Sample Temperature Range    0 to 50 ºC Enclosure Type & Rating    ABS plastic & IP67 rated Power    4 x 1.5 V ‘AAA’ alkaline batteries (> 1200 readings) Certifications/Compliance    FCC part 15 class A, TUV 3 in 1, CE, RoHS Dimensions (LxWxH)     Meter: 15.5 x 6.8 x 4.6 cm Boxed: 35.5 x 16.5 x 10.5 cm Weight    Meter: 200 g Boxed: 1,160 g