Check the listing for details. Milwaukee MA887 Digital Salinity Tester Refractometer. Condition: New. Listed at 169.43 USD. Be confident in your purchase we're an Authorized Coral RX Dealer. How cool is that?!?!? Features:Fast, accurate results with digital dual level LCD readoutEasy measurement with just 2-3 drops of sample needed and results less than 2 secondsAutomatically temperature compensatedSimple one-point calibration using distilled or deionized waterEasy to clean, stainless steel sample well with unit rated to IP65 as "dust tight" and protected against water jetsBattery percent level indicator with automatic shut-off (batteries includedSpecs: Range: 0 to 50 PSU: 0 to 150 ppt | 1.000 to 1.114 S.G. (20/20) | 0 to 80°C / 32 to 176°FResolution: 1 PSU | 1 ppt | 0.001 S.G. (20/20) | 0.1°C / 0.1°FAccuracy: ±2 PSU | ±2 ppt | ±0.002 S.G. (20/20) | ±0.3°C / ±0.5°FLight Source: Yellow LEDMeasurements Time: Approximately 1.5 secondsMinimum Sample Volume 100 µL (cover prism totally)Sample Cell Stainless steel ring and flint glass prismTemperature Compensation: Automatic between 10 and 40°C / 50 to 104°FCase Material: ABSBattery: Type 1 x 9V AA (included)Battery Life: 5000 readingsAuto-shut off: After 3 minutes of non-useEnclosure Rating: IP65Dimensions Meter: 7.6 x 4 x 2.64 inches (192 x 102 x 67 mm)Weight Meter: .93 lbs. (0.42 kg)Dimensions Package: 11 x 6.8 x 4.6 inches (268 x 172 x 118 mm)Weight Packaged: 1.46 lbs. (0.66 kg) Thousands of saltwater aquarium enthusiasts have dialed in the analysis withMilwaukee MA887 Digital Salinity Refractometer. No more visual readings. Get a digital readout within seconds accurate to ±2 ppt with automatic temperature compensation (ATC).