Item Type: Dissolved Oxygen MeterMaterial: ABSUsage: Suitable for Freshwater Aquaculture, Seawater Aquaculture, Swimming Pool, Beverage Factory, Sewage Treatment Plant, Laboratory.Battery: LR44 x 3 (Battery Not Included)Measuring Range:Oxygen Concentration (mg/L): 0.0 to 40.0mg/LDissolved Oxygen Saturation (%): 0.0 to 300.0%Temperature: 0.0-40.0, 32.0-104.0Resolution:Oxygen Concentration (mg/l): 0.1mg/LDissolved Oxygen Saturation (%): 0.10%Temperature: 0.1, 0.1Accuracy:Oxygen Concentration (mg/L): 1.5%F.SDissolved Oxygen Saturation (%): 1.5%F.STemperature: 0.5Calibration Mode: Support One Point or Double Point Automatic Calibration,0.0% (Oxygen-Free Water) or 100.0% (Air)Response Time: 45s (Response at 20)Temperature Compensation Range: Automatic (0 to 40)Altimetric Compensation: NoneBattery Level: Low Battery WarningShutdown: Auto Power off in 8 Minutes if Not Using ItUse Environment: 0 to 40.0 RH Maximum 90%