PHS-1701 Portable pH Meter PHS-1701 portable pH meter is a digital display PH meter, with LCD digital display, which can display PH and temperature values simultaneously. The instrument applies to the labs in junior college institutions, research institutes, environmental monitoring, industrial and mining enterprises and other departments or field sampling to determine the aqueous solutions PH values and potential (mV) values. Equipped with ORP electrode, it can measure the solutions ORP (oxidation-reduction potential) value; equipped with the ion specific electrode, it can measure the electrode potential value of the electrode. Technical Indexes Measuring range pH 0.00â?¦14.00 mV -1999â?¦1999 Temp -5---105 Resolution pH 0.01pH mV 1mV Temp 0.1 Electronic unit measurement error pH ±0.01pH mV ±1mV Temp ±0.3 pH calibration 1point, 2 point, or 3 point Isoelectric point pH 7.00 Buffer solution 8 groups Power supply DC6V/20mA 4 x AA/LR6 1.5 V or NiMH 1.2 V and chargable Size/Weight 230 100 35(mm)/0.4kg Display LCD pH input BNC resistor >10e+12 Temp input RCA(Cinch) NTC30k Data storage Calibration data 198 groups measurement data 99 groups for pH ?mV each) Working condition Temp 5...40 Relative humidity 5%...80%(without condensate) Installation grade Pollution grade 2 Altitude