Bench High Precision PH Meter Technical parameter Voltage : AC100-240V DC9V Display Mode : LCD Temperature Compensation : Automatic/Manual Multi-Point Calibration Function : 2 points Measurement Mode : 50 sets of data Data Storage Function : Movable bracket Net Weight (g) : 1000g Dimension (mm) : 194 189*75mm ORP Measuring Range : - 1999 - 1999 Resolution Ratio : 1 Indication Error : ±0.1%FS pH Measuring Range : -2.00-18.00 PH Resolution Ratio : 0.01 Indication Error : ±0.01