SPECIFICATION Range:0.00 to 14.00pH Resolution:0.01pH Accuracy:0.1pH +/-1 digit Display:3.5 LED display with auto polarity & decimal Input Impedance:10^12 ohms Temp.compensation:30c fixed Calibration: Two buffer calibration 7pH & 4pH or 9.2pH Environment: 5 to 50c Dimantion: 96*96*65mm Weight:0.5kg Standard Accessories: PH Electrode,Buffers,Manual Current Output:4-20mA Power Reuirement:230v A.C +/-10%, 50HZ Single Phase