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Saturday, August 30, 2008

HHO Cell Design

Tight plate spacing reduces the amount of electrolyte required. I've been using 40 mills but I'd like to experiment with 10 mills. I have not found 40 mil to be too restrictive and found no advantage to 80 mil gaskets.

Plate thickness is probably a mute point, but thin gauge can bend and cause a short with very thin gaskets. Even so, I prefer the thinnest gauge in order to save space, weight, and cost. The electrical resistance of the plates may be something to consider. Stainless Steel has more resistance than ordinary steel. In the future I may make a test generator with connections at both ends of the plate to see if this would have any affect. My guess is that it would not.

I can't say first hand but many people seem to think 316 SS is a better choice than 304 SS. I have not seen any tests to prove this and I have been using 304 because it's softer and easier to machine.

I like dry cells as opposed to wet cell generators because there is no side current leakage and I believe it is easier to build without wasting space. There is also very little excess HHO in the electrolyzer at any time, which lowers the danger of the electrolyzer exploding from a spark. On that note - When building a wet cell be sure to make all electrical connections very tight, as a spark inside would be very dangerous.

Bob Campbell
I love the smell of HHO in the morning.


  1. what do you use to power the cell ? would a old welding machine work or a Pc power supply ?

  2. RE: Request for assistance

    Dear Sir, Madam,

    I would appreciate it very much if you could help me with certain issues, as follows:

    I am the owner of a company dealing with Auto Carrier works. This year I have installed on my vehicles dry HHO (304 Stainless steel and rubber Sora 70). Device has 21 plates, one in five is a contact (+, -). Spacing of plates is 1.3 mm. I am very pleased with it since it does not drip nor create any problem (Temp. max 60C). With this Device I have managed to accomplish 1 liter of HHO gas to 13.5V and 15A. All Devices operate at max 50A, which makes more than 3 liters per minute. The catalyst is KOH - in a solution of 2%. I have not managed to save almost anything (max 7%).

    I must have made a mistake somewhere, I just do not have any idea where.

    I own three trucks, as follows:

     Peugeot Boxer with 2800 cm3 turbo engine, HDI, Common Rail without cargo weights 2100kg, uses euro diesel fuel of 8.3l (80 km/per hour) to 12l (130 km/per hour). It has a MAP sensor which we have reduced to 320mv (if I reduce it to 340mv, or more, it indicates an error on the instrument panel). Others have no sensors (MAP, MAF, OH ...);
     Fiat Ducato with 2800 cm3 turbo engine, without cargo weights 2000kg, uses euro diesel fuel of 8.5 (80 km/per hour) to 12l (130 km/per hour);
     Peugoet Boxer with 2800 cm3 engine, without cargo weights 1900 kg, uses diesel fuel 8.5l (80 km/per hour) to 12l (130 km/per hour).

    It is claimed on the Internet, in the certain advertisements, that it is possible to accomplish savings up to 20% to 30% with only 1 liter of HHO gas/per 1000 cm3 of the engine power, however, I have managed to save only 3.3 liters of HHO on 2800 cm3.

    I have made leak check on installations of all my vehicles, and have checked the exact consumption of electricity as well, and have not managed to find any error so far. Vehicles are tested on the highway (at the speed of 90 km/per hour) with and without the Device.

    I am getting desperate now since there seems to be no way that I can achieve greater savings, and just do not know what to do next. I would appreciate it very much if you could help me determine what has gone wrong.

    For any additional information, please contact me on my e-mail address:

    Hoping to hear from you soon, I remain with

    Best regards,

    Belgrade / Republic of Serbia

  3. I'm a HHO Factory, we made the hho generator 1LPM less than 10Amps/cell we use 316SS LL, gap by special spcing 0,8mm , no need KOH, NaOH or any sodium. Our link is , God B U All

  4. I am building a hho cell would like to find our the optimum plate size and spacing. What effects the amps in the system?

    I would like to build a 7 plate cell. Please help


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