Want to know whether the dissolved oxygen value of water is up to the standard? If so, this pen-type dissolved oxygen meter is what you need. Designed and made with imported components and sensor with high sensitivity and accuracy. Dissolved Oxygen Meter is widely applied in industry, electrical and agriculture, medicine, food industry, quality of drinking water, etc.Features:Test the DO(dissolved oxygen) value and temperature(/) of water.Large battery capacity, bulit-in 3.7V/1000mAh lithium battery.Pen-type intelligent dissolved oxygen analyzer, portable and easy to carry.Facilitate the user to carry on-site operation to display dissolved oxygen values and temperatures.Pocket size, lightweight with backlight & large LCD display for clear and easy reading.ATC function (automatic temperature compensation), fast response time and automatic calibration.Apply in soil-free growing, aquarium, swimming pools, freshwater culture, mariculture, beverage factory, wastewater treatment plant, laboratory, etc.NOTE: reagentNa2SO3and CoCl2are NOT included! Customers can buy the reagent by themselves.Specifications:Material: ABS PlasticItem Name: Pen Type Dissolved Oxygen MeterDisplay: Large LCD Display with Switchable BacklightRange: Dissolved Oxygen: 0.00 to 20.00 mg/L Temperature: 0 40 (32.0 104)Response Time: 30 secondsResolution: Dissolved Oxygen: 0.01 mg/L Temperature: 0.1(0.2)Accuracy: Dissolved Oxygen: ±0.4 mg/L Temperature: ±1Salinity Compensation: YES(ppt)Pressure Compensation: YES(mmHg/KPa)Automatic Temperature Compensation: 0 40Working Temperature: 0 40 (32 104)Working Humidity: ≤85%RHPower: 1* 3.7V/1000mAhlithium batteryCharging limited voltage: 4.2VAuto Power off: 5 Minutes without any operationData Hold: YESLow Battery Indication: YESTemperature Unit: / SwitchableItem Size: Approx. 140 * 43 * 43mm / 5.5 * 1.7 * 1.7inItem Weight: Approx. 132g / 4.6ozPackage Size: Approx. 24.5 * 9 * 5.3cm / 9.6 * 3.5 * 2.1inPackage Weight: Approx. 250g / 8.8ozPackage List:1 * Dissolved Oxygen Meter3 * Spare Probe Protective Cover1 * Storage Bag1 * User Manual1* Electrolyte