[Valuable and Reliable Hydrogen Water Tester] This tester specifically to test hydrogen levels in water treated with hydrogen water bottle. The hydrogen tester has a range of 0-2400ppb/0.001-2.400ppm, allowing for the accurate measurement of hydrogen concentration in drinking water. The UIUZMAR H2 meter is capable of quickly measuring the hydrogen levels in various sources such as hydrogen water bottles and hydrogen water systems. | [Hydrogen Water ppb/ppm Test Kit] This hydrogen water test pen has 2 H2 modes (ppb/ppm). Short press MODE/CAL button to easily converse between ppb and ppm modes. The H2 tester utilizes an upgraded version of the electrode polymer reference, enabling it to obtain accurate and stable readings more efficiently. Additionally, the cover contains a sponge with protective fluid, which serves to prolong the service life of the meter. | [High Accuracy pH and ORP Meter] With pH and ORP functions, easily monitor important parameters in your water. By routinely monitoring pH and ORP levels can adjust your water treatment plan accordingly. With a high accuracy of 0.01 resolution, pH meter provides precise readings, ensuring that you get accurate information in your water. | [pH PPM EC Meter for Home Hydroponic System] Work great for monitoring pH PPM EC level and water temp, easy to use and repeatable enough to help you keep hydroponic tank balanced. Widely used in hydroponics, aquaponics, DWC, and pH water system. | [6 in 1 Multi-function Meter] pH Tester offers a comprehensive 6-in-1 solution for pH, hydrogen concentration, ORP, TDS, EC and temperature. Gives reading very quickly and accurate and is perfect for checking liquid. Suitable for swimming pool hot tubs spas, drinking water, RO water, well water, ponds, beverages, brewing, and aquarium.