Item Type: Hydrogen Test Pen <br>Material: ABS <br>H2 Range: 0 to 2400ppb, 0 to 2.400ppm <br>Resolution: 2ppb, 0.002ppm <br>Accuracy: ±10ppb, ±0.01ppm <br>Temperature Range: 0.1 to 60.0℃, 32.0 to 140℉ <br>Resolution: 0.1℃/0.1℉ <br>Accuracy: ±0.5 <br>Working Environment: 0 to 60℃ (32.0 to 140℉), RH 90% <br>Waterproof: IP67 <br>Battery: 3 x 1.5V Button Battery (LR44) (Battery Not Included) <br>Product Size: Approx. 183 x 37mm / 7.2 x 1.5in <br>Display: LCD Digital Display with Backlit <br>Temperature: Automatic Temperature Compensation 0 to 60℃ <br>Data Retention: Value Retention <br>Automatic Shutdown: 5 Minutes <br>H2 Calibration Point: 224±, an Error of ±20ppb is Normal <br>Application: Suitable for Swimming Pool Experiments, Hydroponic Foods, Aquariums, Gardening, Laboratories, Water Purification Drinking Water, Pond, Etc. <br>Weight: Approx. 139g / 4.9oz<br>1、High Quality Materials: Made of high quality ABS material, the hydrogen measuring pen is sturdy, durable and not easily damaged. <br>2、Detachable Probe Design: With a detachable probe design, the hydrogen measuring pen is easy to use and simple to operate. <br>3、High Sensitivity: Adopting sophisticated production technology, the hydrogen measuring pen probe has high sensitivity and excellent performance. <br>4、Backlit LCD Design: The hydrogen test pen adopts a backlit LCD design, which can read clearly in any dark environment. <br>5、Scope of Application: Suitable for swimming pool experiments, hydroponic food, aquariums, gardening, laboratories, water purification drinking water, pond, etc.The electrode should be cleaned after use <br>This 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.1 x <br> <br>Hydrogen Test Pen <br> <br>(Battery Not Included)<p>1 x&nbsp;User Manual</p>