Check the listing for details. AZ86031 Water Quality Meter PH/Conductivity/Salinity/D.O/TDS Tester all in 1. Condition: New. Listed at 355.00 USD. AZ86031 Water Quality Meter PH/Conductivity/Salinity/D.O/TDS Tester all in 1AZ86031 the Water Quality Meter Dissolved Oxygen Tester PH Meter DO Meter, Conductivity Salinity Meter Features:*Large LCD with multiple parameters display simultaneously*pH, Conductivity or Salinity or TDS, Dissolved oxygen & Temperature*Handheld fashion housing with IP67 waterproof design*Auto temperature compensation*Auto ranging for conductivity measurement*Multiple points calibration: 3 points for pH, 1point for D.O.,4 points for conductivity*Manually altitude/salinity compensation for D.O. measurement*99 points memories w/ recall function*1 hour auto power off SpecificationsPH range/resolution：2.00-12.00/ resolution:0.01PH accuracy：+/-0.1Cond range:0-199.9,0-1999us/cm,0-19.99,0-150.0mS/cmCond. accuracy：+/-1%F,s+/-1digtCond resolution：0.1uS/cm, 1uS/cm. 0. 01mS/cm. 0.1mS/cmTDS. Range ns：0-1999°1,0-1999·1ppm.0-19.99°.0-150.0pptTDS. Accuracy/res： +/-1%FS+/-1 digit; res: 0.1, 1ppm: 0.01, 0.1pptTDS Factor：0.30-1.00Salinity range：0-10.00ppt: 0-42,ppt(SEA WATER)Salinity accuracy/res：+/-1% F S+/-1 digit: res: 0.01 ppt. 0. 1pptD.O. range：0.0-199.9%(0.0-30.0mg/L)D O. Accuracylres：+/-3% of F.S. +1 digit res: 0.1Temp.range：-5~60,0°cTemp. Accuracy/res：+/-0.5c:0.1Compatible probe： PH probe, EC probe and D.O probe Could be all used on one meter at the same timeLCD size(mm)：32.5(H)X54(W)Operating temp. &RH%：0-50°c Humidity