HM DIGITAL TDS-4 TDS Meter handheld tds Tester With Large LCD Screen Testing water tds for Hydroponics Gardening Aquariums Reefs Pools Spas Water Treatment Drinking Pure Filter system Specifications -Range: 0 - 9990 ppm (mg/L) -Resolution: 0-999: 1 ppm; 1000-9990 10 ppm (indicated by a'x10' icon) -Accuracy: +/- 2% -EC-to-TDS Conversion Factor: NaCl (avg. 0.5) -ATC: Built-in sensor for Automatic Temperature Compensation of 1 to 50 degrees Celsius (33 to 122 degrees Farenheit) -Power source: 2 x 1.5V button cell batteries (LR44 or equivalent) -Battery life: 1000 hours of usage -Dimensions: 14 x 2.3 x 1.5 cm (5.5 x .9 x .55 inches) -Weight: 34g (1.2 oz)
