Feature:1. High Quality Materials: Made of high quality ABS material, the hydrogen measuring pen is sturdy, durable and not easily damaged.2. Detachable Probe Design: With a detachable probe design, the hydrogen measuring pen is easy to use and simple to operate.3. High Sensitivity: Adopting sophisticated production technology, the hydrogen measuring pen probe has high sensitivity and excellent performance.4. Backlit LCD Design: The hydrogen test pen adopts a backlit LCD design, which can read clearly in any dark environment.5. Scope of Application: Suitable for swimming pool experiments, hydroponic food, aquariums, gardening, laboratories, water purification drinking water, pond, etc.Specification:.Item Type: Hydrogen Test PenMaterial: ABSH2 Range: 0 to 2400ppb, 0 to 2.400ppmResolution: 2ppb, 0.002ppmAccuracy: 10ppb, 0.01ppmTemperature Range: 0.1 to 60.0, 32.0 to 140Resolution: 0.1/0.1Accuracy: 0.5Working Environment: 0 to 60 (32.0 to 140), RH 90%Waterproof: IP67Battery: 3 x 1.5V Button Battery (LR44) (Battery Not Included)Product Size: Approx. 183 x 37mm / 7.2 x 1.5inDisplay: LCD Digital Display with BacklitTemperature: Automatic Temperature Compensation 0 to 60Data Retention: Value RetentionAutomatic Shutdown: 5 MinutesH2 Calibration Point: 224, an Error of 20ppb is NormalApplication: Suitable for Swimming Pool Experiments, Hydroponic Foods, Aquariums, Gardening, Laboratories, Water Purification Drinking Water, Pond, Etc.Weight: Approx. 139g / 4.9ozPackage List:1 xHydrogen Test Pen(Battery Not Included)1 x User ManualNote:The electrode should be cleaned after useThis product can only measure hydrogen‑rich water, and only the hydrogen content in the liquid tested by the product will display the value, otherwise only the temperature will be displayed. For example, if there is no hydrogen content in tap water, the test tap water will not display the value.