Axiom H2 Hydrogen & ORP Meter

A handheld meter that gives a quick visual check that your hydrogen device is working and your water properties have changed. Batteries included.

Good to know: handheld meters show a change, not an exact hydrogen concentration. Minerals, temperature and pH can affect readings, and meters of this type don't read above about 2 ppm. Lab gas chromatography is the only precise way to measure dissolved hydrogen.