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EC/TDS/Temp Waterproof Hydro Tester. KEY FEATURESBest value in its class (under $50)MeasuresÂ electrical conductivityÂ (EC), TDS and temperature.Automatic Temperature Compensation (ATC)Water-resistant housingLarge LCD displayHold button and Auto shut-offDigital Calibration (push button) Low battery indicatorVery reliable and long lastingÂ SPECIFICATIONSRange: 0-9999 ÂµS / 0-5000PPMTemperature Range: 0-80 Â°C; 32-176 Â°FResolution: 1 Î¼S/ ppmÂ Temp. resolution is 0.1 Â°C/FAccurate to +/- 2%Power source:Â 1 x 3V button cell (included) (model 357A / LR44)Dimensions:Â 15.3 x 3.2 x 1.8 cm (6.0 x 1.3 x 0.7 inches)Â Weight:Â 53.9 g (1.9 oz). EC/TDS/Temp Waterproof Hydro Tester