Features1Oxygen and Temperature: This dissolved oxygen meter can be used to measure dissolved oxygen and temperature. Inbuilt microcomputer processor calculates and compensates all dissolved oxygen and temperature related measurement data. 2Detachable Probe: This dissolved oxygen sensor adopts detachable probe, easy to replace, equipped with 6 probe protective covers. 3Digital Screen Display: This dissolved oxygen tester adopts digital screen display, which is clearer and more convenient to read the data. Support auto power off in 8 minutes if not using it. 4Temperature Compensation: Oxygen solubility will be affected by temperature, atmospheric pressure, and salinity. Our instrument with temperature compensation can meet normal use. 5Wide Application: This dissolved oxygen meter is widely used in aquariums, swimming pools, pond, freshwater aquaculture, Marine aquaculture, school teaching experiment, laboratory sterile environment, aquaculture, scientific research and other fieldsSpecificationItem 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%Package List1 x Dissolved Oxygen Meter (Battery Not Included) 1 x Dissolved Oxygen Electrode 6 x Oxygen Membrane Group 1 x User Manual 1 x Dissolved Oxygen Filling Liquid