Welcome to HHO2U Hydrogen on Demand and HHO glossary.

We have compiled this list of hydrogen on demand terms and hho generator related terms to help you in understanding the basics of a hydrogen on demand system and related hydrogen on demand parts – hopefully it will make your life easier when doing research on Hydroxy generators and hydrogen on demand systems for your auto or truck. Wikipedia provides most of the definitions.

We will be adding to this Hydrogen on Demand glossary all the time so consider this the beginning.

If you would like to see anything added to the glossary then don’t hesitate to Contact Us so it can be added.

Amps: is a unit of electric current, or amount of electric charge per second. The ampere is an SI base unit, and is named after André-Marie Ampère, one of the main discoverers of electromagnetism. It is the measurement of the number of electrons passing through a given point in one second intervals. Around six quintillion (6 followed by 18 zero’s) electrons passing through a given point each second constitutes one amp[1]. (Since electrons have negative charge, they flow in the opposite direction of the current.)

Baking Soda: Sodium bicarbonate or sodium hydrogen carbonate is the chemical compound with the formula NaHCO3. Above 60 °C (140F), it gradually decomposes into sodium carbonate, water and carbon dioxide. The conversion is fast at 200 °C (392F)

Browns Gas: Oxyhydrogen gas produced in a common-ducted electrolyzer has been referred to as “Brown’s gas”,after Yull Brown who received a utility patent for a series cell common-ducted electrolyzer in 1977 and 1978 (the term “Brown’s gas” is not used in his patents, but “a mixture of oxygen and hydrogen” is referenced). Brown’s torches also used an electric arc to increase the temperature of the flame (called atomic welding):

Bubbler: is a simple flashback device, used to prevent the burning gas from entering the HHO gas generating chamber and creating an explosion. The device by design can itself explode the quantity of gas in the head space above the water, destroying the bubbler, spreading the diluted catalyst and shrapnel from the container. For safety, reduce the head space to the bare minimum needed, change the water on some schedule to prevent the catalyst becoming strong enough to create chemical burns.

Bubbler adjustment valve : A valve installed on the HHO generator to adjust the air intake of the unit. When adjusted properly it will maximize the output of Hydroxy gas produced by any particular HHO generator.

Catalyst : is a chemical compound that acts to speed up a reaction, but in the process is not itself changed. Therefore the catalyst, at the end of the reaction, is free to act again to assist another reactant through the reaction.

Catalysts work by lowering the energy barrier between the reactants and the products. In this case:

2H2O + ENERGY = 2H2 + O2

where it normally takes a tremendous amount of energy to convert reactants to products – the addition of a catalyst can decrease the amount of energy required and therefore speed the reaction up!

2H2O + CATALYST+ energy = 2H2 + O2 + CATALYST

Cell: Is a device used for generating an electromotive force (voltage) and current from chemical reactions. In HHO production the cell is very similar to a battery cell, except instead of producing electricity, it produces HHO. Many Shapes and Styles are in use, many actually look like a multi cell battery. In fact most cells using catalyst will show a degrading voltage across the terminals when power is removed. The number of cells in a HHO generator determine the efficiency of the unit because the more cells used the voltage is spread out further.

Check Valve: Limits the flow of gas to one direction only. Use a check valve between the bubbler and generator to prevent unwanted pressure build up in the generator, and a safety against a low level bubbler. A check valve, such as used on torches, is recommended. Many homemade ones are being designed for hobbyists to build. Many are available at welding supply houses and aquarium shops (they’re used in fish tanks). There should always be a check valve install on your HHO generator.

EFIE : Electronic Fuel Injection Enhancer: It’s purpose is to make it possible for other fuel efficiency devices to work. Basically an HHO fuel cell (HHO generator) adds HHO gas to the fuel mix which when burnt by the engine burns much cleaner than gas alone. The  oxygen sensor data will cause ECU computer in your car actually uses MORE fuel in order to compensate for the extra oxygen so that wipes out the whole point of the fuel cell. The EFIE solves this by adjusting the signal to the computer so the computer is happy with the readings it’s getting and makes the correct adjustments for the various conditions of the engine.


Or buy the best EFIE on the market HERE

Electrolyte : Is any substance containing free ions that behaves as an electrically conductive medium. You will hear some using this term in the place of “catalyst”. In the production of Hydroxy gas using electrolysis catalyst is the correct term because of the function it performs to speed up the production of HHO gas.

Electrolysis : Is a method of separating chemically bonded compounds by passing an electric current through them. Electrolysis is commercially highly important as a stage in the separation of elements from naturally-occurring sources such as ores.

Electrolyzer : Is also called HHO Generator because it separates each water particle (molecule) into a different arrangement, 2-Hydrogen, bonded together, plus 1- Oxygen.

Flashback device: A device that prevents a flame front from returning to the source of gas and causing an explosion. example: like a torch flame traveling down the acetylene or Oxygen hose to the tank and igniting the tank of fuel.

HHO: is a mixture of hydrogen (H2) and oxygen (O2) gases, typically in a 2:1 atomic ratio, the same proportion as water. This gaseous mixture is widely used for torches for the processing of refractory materials. HHO is what we add to our fuel mix in our engines and this is what gives us better gas mileage when installed as a hydrogen on demand system.

HHO will combust when brought to its autoignition temperature. For a stoichiometric mixture at normal atmospheric pressure, autoignition occurs at about 570 °C (1065 °F). The minimum energy required to ignite such a mixture with a spark is about 20 microjoules. At normal temperature and pressure, oxyhydrogen can burn when it is between about 4% and 94% hydrogen by volume. Abbreviation for Hydrogen Hydrogen Oxygen, which is what water (H2O) is broken down into.

HHO Generator : The main component in a Hydrogen on Demand system is the HHO or Hydroxy gas generator. This device can be a simple one cell unit or have as many cells as needed to produce the quantity of HHo gas desired.

Get several FREE HHO Generator Plans HERE.

Or buy the best water4gas type HHO generators HERE

HFE: Hydrogen Fuel Enhancement – newer term for HHO

HOD: Hydrogen on Demand is a complete system, usually consisting of a HHO generator along with other fuel saving devices, this system applies HHO gas to your fuel intake and only makes the hydroxy gas in quantities that will be used as needed with out any dangerous storage tanks.

Hydroxy gas: A nickname for oxyhydrogen combination of hydrogen and oxygen gas produced from the electrolysis of water. This is the term a lot of people studying Hydrogen on demand systems are using because a trademark was applied for on the term HHO.

Joule: is the SI unit of energy measuring heat, electricity and mechanical work. It was named after English physicist James Prescott Joule. For example – kilo joule is a unit used when measuring.

KOH: potassium hydroxide. It is very alkaline and is a “strong base”. The dissolution in water is strongly exothermic, producing substantial amounts of energy in form of heat, leading to temperature rise, sometimes up to boiling point and over. As a very strong base/alkali, potassium hydroxide is very corrosive, both towards inorganic as well as organic materials, including living tissues; care must be therefore taken, when handling the substance and its solutions. It can be used as a catalyst instead of baking soda in the HHO fuel cell.

Liter/ liter: international unit of volume is the cubic meter (m3). One liter/ liter is equal to 0.001 cubic metre and is denoted as 1 cubic decimeter (dm3).

MAP SENSOR : Manifold absolute pressure sensor (MAP) is one of the sensors used in an internal combustion engine’s electronic control system. Engines that use a MAP sensor are typically fuel injected. The manifold absolute pressure sensor provides instantaneous manifold pressure information to the engine’s electronic control unit (ECU). This is necessary to calculate air density and determine the engine’s air mass flow rate, which in turn is used to calculate the appropriate fuel flow.

MAP SENSOR ENHANCERS : If you are going to convert your automobile over to burn HHO gas. You need one of these map sensor Enhancers. Most cars and trucks 1990 and newer that have fuel injection with a map sensor need one of these to allow the driver to fine tune and manually cut back the fuel flow to the injectors. This allows you to adjust the fuel injection ratios to lean or rich and change the amount of gas going into the motor. Then your HHO generator can add HHO gas into the incoming gas air mix and fill in the difference left empty by leaner gasoline fuel ratios. This scenario will Save Money at the PUMP!

For FREE Plans to Build a Map sensor enhancer go HERE.

To purchase the best Map sensor enhancer on the market go HERE

Milliliter: defined as one-thousandth of a liter (one cubic centimeter)

NaOH: Sodium hydroxide, also known as, caustic soda, is a caustic metallic base. Sodium hydroxide forms a strong alkaline solution when dissolved in a solvent such as water. This can also be used as a catalyst.

OrthoHydrogen: spin isomers of hydrogen

Oxyhydrogen: is a mixture of hydrogen (H2) and oxygen (O2) gases, typically in a 2:1 atomic ratio, the same proportion as water.

Oxyhydrogen will combust when brought to its autoignition temperature. For a stoichiometric mixture at normal atmospheric pressure, autoignition occurs at about 570 °C (1065 °F). The minimum energy required to ignite such a mixture with a spark is about 20 microjoules. At normal temperature and pressure, oxyhydrogen can burn when it is between about 4% and 94% hydrogen by volume.

Para hydrogen: spin isomers of Hydrogen

Salt: composed primarily of sodium chloride, with the formula NaCl. elemental chlorine is usually produced by the electrolysis of sodium chloride dissolved in water. Along with chlorine, this chloralkali process yields hydrogen gas and sodium hydroxide, according to the chemical equation

2NaCl + 2H2O ? Cl2 + H2 + 2NaOH

Chlorine It has a disagreeable, suffocating odor that is detectable in concentrations as low as 3.5 ppm and is poisonous. This should be avoided as a catalyst completely just for personal safety.

Sodium carbonate: also know as soda ash, sal soda etc is an excellent electrolyte or catalyst can be bought in laundry section (sal soda, washing soda) and in spa/pool stores for decreasing ph. It also doesn’t corrode the anodes.

Sulphuric Acid: is a strong mineral acid with the molecular formula H2SO4. It is soluble in water at all concentrations. Some common concentrations are

* 10%, dilute sulfuric acid for laboratory use,

* 33.5%, battery acid (used in lead-acid batteries),

* 62.18%, chamber or fertilizer acid,

* 77.67%, tower or Glover acid,

* 98%, concentrated acid.

The hydration reaction of sulfuric acid is highly exothermic. If water is added to the concentrated sulfuric acid, it can react, boil and spit dangerously. One should always add the acid to the water rather than the water to the acid. Sulfuric acid reacts with most metals via a single displacement reaction to produce hydrogen gas and the metal sulfate. Dilute H2SO4 attacks iron, aluminum, zinc, manganese, magnesium and nickel, but reactions with tin and copper require the acid to be hot and concentrated. Lead and tungsten, however, are resistant to sulfuric acid.

Volts: is the SI derived unit of electric potential difference or electromotive force. It is named in honor of the Lombard physicist Alessandro Volta (1745–1827), who invented the voltaic pile, the first modern chemical battery.

Water4gas : Ozzie Freedom the founder of the most popular hydrogen on demand e book course and information on fuel savings.

Watt: is the SI derived unit of power, equal to one joule of energy per second. It measures a rate of energy use or production.

If you want to build your own HHO generator or a complete Hydrogen on Demand system for your auto or truck then check out: HHO2U.com for Hydrogen on demand parts or complete Hydrogen on demand kits.

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