... rate 4. stable quality Ultra Pure Introduction: DH-300 model hydrogen generator, use Palladium filtration membrane technology, could produce ultra ... allow H and H isotopePass by, so final output hydrogen purity could guarantee reach more than 99.99999% 99. ... purity, palladium technology, 0--300ml/min supper pure hydrogen generator! Compared with other hydrogen generator, DH-300 does not have very high ...