Hanna Portable pH Meter

HI 8424
Waterproof pH Meter with Automatic Calibration and Temperature Compensation
Range pH -2.00 to 16.00 pH
Range mV ±699.9 mV; ±1999 mV
Range Temperature -20.0 to 120.0°C / -4.0 to 248.0°F
Resolution pH 0.01 pH
Resolution mV 0.1 mV; 1 mV
Resolution Temperature 0.1°C / 0.1°F
Accuracy pH ±0.01 pH
Accuracy mV ±0.2 mV; ±1 mV
Accuracy Temperature ±0.4°C / ±0.8°F
pH Calibration automatic, 1 or 2 point with 3 memorized buffer values (4.01, 7.01, 10.01)
pH Calibration Offset Calibration ±1 pH
pH Calibration Slope Calibration 75 to 110%
Input Impedance 1012 Ohm
Temperature Compensation Automatic, -20 to 120°C (-4 to 248°F) or manual without temperature probe
pH Electrode HI 1230B, double junction, gel filled
PEI (PolyEther-Imide) body, BNC connector, 1 m (3.3') cable (included)
Temperature Probe HI 7669AW with 1 m (3.3') cable (included)
Battery Type / Life 1 x 9V / approx. 150 hours of continuous use;
auto-off after 20 minutes of non-use or disabled (user-selectable)
Environment 0 to 50°C (32 to 122°F); RH max 100%
Dimensions 164 x 76 x 45 mm (6.5 x 3.0 x 1.8")
Weight 180 g (6.3 oz.)