HM DIGITAL TDS Meters TDS-3 Handheld Temperature TDS ( PPM ) Tester, 0 - 9990 ppm, 1 ppm Resolution, +/- 2% Readout Accuracy Testing Water Quality For Hydroponics Aquariums Pools Drinking etc;

Specifications
TDS Range: 0 - 9990 ppm (mg/L)
Temp. Range: 0 - 80 degrees Celsius
Resolution: 0-999: 1 ppm; 1000-9990: 10 ppm (indicated by a 'x10' icon)
Temperature Resolution: 0.1 degree Celsius (Celsius only)
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 Fahrenheit)
Power source: 2 x 1.5V button cell batteries (included) (LR44 or equivalent)
Battery life: 1000 hours of usage
Dimensions: 15.5 x 3.1 x 2.3cm (6.1 x 1.25 x 1 inches)
Weight with case: 76.5g (2.7 oz)
Weight without case: 56.7g (2 oz)