Hanna Primo Pocket TDS Tester 0 To 1999ppm

Range   0 to 1999 ppm (mg/L) Resolution   1 ppm (mg/L) Accuracy   ±2% F.S. Calibration Solution   HI 70032P Calibration   automatic, at 1382 ppm Temperature Compensation   Automatic, 0 to 60°C (32 to 140°F), ß=2%/°C Battery Type / Life   2 x 1.5V / approx. 200 hours; auto-off after 5 minutes of non-use Environment   0 to 50°C (32 to 122°F); RH max 95% Dimensions   180 x 50 x 25 mm (7.1 x 2.0 x 1.0") Weight   50 g (1.8 oz.)