... Proton Exchange Membrane (PEM) cell eliminates the need for liquid electrolytes (PEM) cell eliminates the use of liquid electrolytes with hydrogen generators. Deionized water is all ... H2_Generator_ph_so_gen ... Parker Balston® PEM Hydrogen Generators ... H2PEM_ug.pdf ... Proton Exchange Membrane (PEM) cell eliminates the need for liquid electrolytes...