💧Hydrogen Water Tester 2 Modes (ppb/ppm):Whether you are used to using ppb mode or ppm mode, this hydrogen tester for water can meet your habits.Short press the MODE/CAL button to easily converse between ppb and ppm modes.And press the "HOLD/TEMP" key to easily lock the readings, making it easy for you to accurately record your measurements,press again to unlock it. 💧4-in-1 Water Tester for Drinking Water: 4-in-1 ph tester that can measure pH,hydrogen,ORP,and temperature at the same time.The hydrogen tester for water range:0-2400ppb/0.001-2.400ppm,which hydrogen water tester can obtain accurate hydrogen concentration in drinking water. 💧High Accuracy PH Meter-The pH meter features a high-sensitivity glass probe, offering a complete measurement range from 0 to 14 pH with a remarkable 0.01 pH resolution.It can not only measure hydrogen water but also can be used to test swimming pools, hydroponics, aquariums, fish tanks, koi ponds,beer and wine brewing, drinking water, well water, RO water, well water, ponds, etc. 💧Multifunctional ORP Meter -- Water tester has automatic temperature compensation（ATC） function and HD LCD backlight display, which can achieve accurate readings even in temp changes and dim environments.Our orp meter includes an automatic power-off feature, which conserves power by turning it off after 5 minutes of inactivity. 💧3-Point Calibration ppm meter: pH meter adopts 3-point calibration (4.00 7.00 10.01), which can obtain the pH value more accurately.Water tester has been calibrated before leaving the factory and does not need to be recalibrated before first use. Pocket size design, light weight, can be carried around and measure solution anytime & anywhere. Hydrogen Water Tester,4 in 1 pH H2 ORP Temp Test,Hydrogen Water Tester ppb/ppm Meter,Accurate pH Hydrogen ORP Meter with ATC & Backlight,Digital Water Testing kits for Drinking Water Quality,Tap, Well, Swimming Pool, Aquarium, RO/DI System, Hydroponics