Features1DIGITAL DISPLAY: Digital hydrogen meter adopts LED digital screen display with backlight design, which makes reading data more clear and convenient. 2DATA HOLD FUNCTION: Pen type H2 meter has data hold function, easy to store and use, easy to operate, just press "HOLD" button to lock the data. 3BATTERY POWERED: Under the low voltage prompt, when the display is dim and the battery symbol appears at the top of the display, indicating the battery voltage is insufficient, please replace the new battery as soon as possible. 4PORTABLE DESIGN: Water quality tester adopts handheld design, small size and light weight, does not take up space, easy to carry. 5WIDE APPLICATION: Hydrogen tester is widely used in environmental protection, food, health, geological exploration, metallurgy, surface water, industrial wastewater, drinking water and other testing.SpecificationItem Type: Digital Hydrogen MeterMaterial: ABSProduct Size: Approx. 18.8cm/7.4inGross Weight: 245g/8.6ozDisplay: H2 and Temperature Dual DisplayMeasuring Range: 0?2400ppb, 0?2.40ppmResolution: 2ppb, 0.02ppmAutomatic Temperature Compensation: 0?50Operating Temperature: 0?5032?122)Temperature Display Resolution: 0.1Temperature Accuracy: 0.2 Auto Shutdown: 10 MinutesLow Pressure Display: Yes and DegreeF Temperature Conversion: YesData Retention: YesBattery: 4 x LR44 1.5V Button Cell (Shipped Without Battery)Product with BacklightUses: Widely Used in Environmental Protection, Food, Health, Geological Exploration, Metallurgy, Surface Water, Industrial Wastewater, Drinking Water and Other TestingPackage List1 x Water Quality Testing Pen 1 x Instruction Manual 1 x Storage Box