pH analyzer Adopt LCD screen, the instrument can auto-exhaust, liquid charging, test. In the end the instrument will auto-evacuate , washing .Reset test cup: 1~6 Measuring range : 0.001-0.300mgKOH/gResolution: 0.001mg KOH/g Repeatability: 0.003mg KOH/gMeasuring error: ±0.005mg KOH/gSupply voltage: AC220V Frequency:50Hz pH analyzer