Feature:1. MAIN PURPOSE: This water quality detector is portable design, can display hydrogen and temperature range, convenient and practical.2. WIDE APPLICATION: Can be used for water electrolysis machine, hydrogen enrichment and pot effect test, and laboratory hydrogen water measurement.3. PROBE TYPE: The water quality detector adopts high sensitivity electrode, probe insertion type design, detachable and replaceable.4. GOOD PERFORMANCE: This portable test pen has high accuracy, IP67 waterproof, supports backlight display and temperature compensation.5. EASY OPERATION: After turning on the device, put the electrode of the device in the water to start the detection, which is convenient for the operator.Specification:Item Type: Water Quality DetectorModel: YY-400HMaterial: ABSBattery: 1.5V LR44 x 3 (not included)Uses: Drinking water testing, water electrolysis machines, hydrogen rich water cups, hydrogen rich pots, etc. effect testing and data measurement in laboratory research on hydrogen waterH2:Range: 0~2400ppb; 0.00~2.400ppmResolution: 2ppb; 0.002ppmAccuracy: 10ppb; 0.01ppmTemperature:Range: 0.1~60.0; 32.0~140.0Resolution: 0.1; 0.1Accuracy: 0.5.Package List:1 x Detector1 x User Manual