... range0.00~14.00pHResolution0.1pHAccuracy ±0.1pH(@20°C ±0.2pH CalibrationManual,1point Environment RH95% max,0-50 ... .0 to 14.0 pH4. Accuracy: ±0.1pH(@20°C ±0.2pH 5 .Calibration: Manual, 1 point,9. ... Operating Conditions: 0 to 50°C (32 to 122F) RH max 95%10. Battery Type ... for temperature variations.• After use, switch off pH meter, use the water clean the electrode and replace the ...