waterproof mini pH meter

ModelCM510 pH MeterCM520 pH MeterCM530 pH Meter*CM550 pH MeterMeasurement ParameterspHpH/Temp.MvCond./Res/ TDS/Sal./Temp.Range0-14.0 pHpH:-1.00 15.00pH Temp.:0 60°C±1999 MvCond.:(0 50)µS/cm 50 500)µS/cm (0.50 5.00)µS/cm (5.0 50.0) mS/cm Res.: 0 20.0 MΩ•cm TDS: 0 35.0 g/L Sal.: 0 25.0 ppt Temp.:0 50.0°CAccuracy±0.1 PhpH:±0.01 Ph Temp.:±1.0°C±0.2% FSCond:±1.0% FS Temp:±0.5°CAuto. Temp. Compensation0 60°C (No Temp. display)0-60°CNo0 50°CCalibration1 point1 3 pointNo1 pointCalibration SolutionpH 7.00pH 4.00/7.00/10.01222mV ORP standard solution1413µS/cmElectrode Soaking SolutionYesYesYesNoIP RatingIP 57 Dustproof and WaterproofPower2x lithium batteries(CR2032) parallel connectionAuto. Power-offAutomatic power-off without operation after 10 minutesDimension & WeightMeter: 148x29x14mm Weight: 43g Portable Case: 168x96x28mm Weight:180g*The most advanced conductivity waterproofpH meter: One point calibration, measurement range 0 50 Ms/cm, accuracy≤±1.5% FS. Ability to switch among Coductivity, TDS,Salintiy and Resistivity.