Range - 0.0 to 14.0pH, Resolution - 0.1pH, Accuracy - 0.2pH, Calibration to 1pH, Battery Life - 700Hours, Dimensions - 150mm x 30mm x 24mm

Range - 0.0 to 1990ppm, Resolution - 10ppm, Accuracy - +-2%, Calibration to 1point, Battery Life - 350Hours, Temp Compensation 5 - 50 degrees centigrade, Dimensions - 150mm x 30mm x 24mm