7 In 1 Water Quality Monitor Chlorine Meters PH Meter ORP TDS Salinity Testers EC Temp Detector Tool for Pool Filter Aquariums Product Description The 7 in 1 meter is an economically priced, reliable pH meter (aka pH pen or pH tester) that is superb for checking out applications akin to hydroponics & gardening, swimming pools & spas, aquariums & reef tanks, water ionizers, drinking water, boilers and more The COM-600 measures PH,TDS,TEMP,EC,Salinity,SG,ORP consist of Supports 3-point calibration computerized identification ,water resistant body, simultaneous temperature display, sleek, lightweight design, a large LCD display, Automatic Temperature Compensation (ATC),Display help backlight, data-hold operate and low-battery indicator Feature MeasuresPH,TDS,TEMP,EC,Salinity,SG,ORP Calibration Conductivity EC: Supports 3-point calibration automatic identification (1413us 12 and 111) with three calibration features (1413uS/cm 12/CM 111/CM) pH: 1 point (6) or 2 features (6 4) ) (6 9) or 3 points (6 4 9) can robotically identify the calibration answer Waterproof rating: IP67 Sleek, light-weight design Large LCD reveal Display help backlight Automatic Temperature Compensation (ATC) data-hold operate and low-battery indicator Power consumption 2 mA, energy consumption is zero The accuracy within 150ppt is comparatively accurate, and the deviation above 160ppt is large Automatic shutdown :5 minutes Specification EC Measurement range: 0 -10000uS/cm ,10/cm, 20/cm(10 200/cm is effective range) Resolution: 1 uS/cm; zero mS/CM; Accuracy: ±2% F of reading TDS Measurement range: 0-1000ppm ,1000ppm-10000ppm ,10 200(10 one hundred is effective range) Resolution: 1ppm; 0 Accuracy: ±2% F of reading Salinity Measurement range: 0% - 25%,0-10000ppm,10 Resolution:1ppm;0; 0% Accuracy: 0%-5% (±0%) ;5%-25% (±1%);±2% F PH Measurement range: zero Resolution: 0 Accuracy: ±0 ORPMeasurement range: 0~±999mV Resolution: 1mv Accuracy: ±2mv S:Measurement range: 1~1 Working environment: zero - 60 ° C (32 ° F); RH one hundred pc TDS factor: zero - 1 Temperature range: 0-60 °C 32 °F Temperature accuracy: ±0°C Temperature resolution: 1 °C / °F Power source: 3x1( LR44 no longer incorporated ) Display size: 33*24mm Size: 183*37*37mm (7*1*1)