This Simple Device Used the Excess + Electrons in the HHO (hgas) to build a charge on the Steel wool
which act like a Electron extracton circuit. It than replell some or the negatively chaged Oxygen gas in the HHO.
This is a added layer of fine filter media to help further, normally a fine Special Oxygen absorbing gel.
PLease note we can use smashed up Catalytic convertors to remove o2 also .