Spectrum discharge tube with Molecular Hydrogen (H2) as its gas. One of a series of gas tubes that show spectral lines of pure substances.

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Spectroscopy Tube length is approx. 26 cm.

Please note:For intermittent use only, not to be used as a lamp source. These are designed to operate 30 seconds ON - 30 seconds OFF.

Due to the very small size of hydrogen gas molecules, hydrogen spectrum tubes do not have as long of a lifespan as other tubes.

Products being sold are not toys. They are for Educational / Laboratory use only. They are not for use by children 12 and under.

Guide to Buying a Hydrogen Generator

In a world increasingly focused on sustainability and clean energy, hydrogen has emerged as a solution for a variety of applications. Hydrogen generators have become increasingly essential for industry, research and even domestic use, as they provide a convenient way to produce hydrogen gas on demand.  But buying a hydrogen generator can be confusing. What are the different types available, and what are the advantages and disadvantages with each? Luckily, Horizon is here to help. We'll take you through the hydrogen generators (electrolyzers) on the market today, giving a complete guide for those looking to make an informed decision.

What is a Hydrogen Generator?

A hydrogen generator is a device that produces hydrogen through a chemical process. Usually this happens via something called electrolysis, where an electrical current is passed through water, splitting it into hydrogen and oxygen.

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That's why most hydrogen generators are called 'electrolyzers'.
 

Some of the advantages of using electrolyzers are:

• They're reliable and can produce ultra-pure hydrogen (> 99.99%) without any pollution when the electrical source is renewable energy.
• This hydrogen can be produced directly on-site, saving costs on storage
• They're much cheaper than using gas supplied in high-pressure cylinders

Types of Hydrogen Generator Designs

There are actually many ways to build and configure an electrolyzer. These can be divided into two main types of designs: unipolar and bipolar. The unipolar design typically uses a liquid electrolyte (alkaline liquids), while the bipolar design uses a solid polymer electrolyte (proton exchange membrane or 'PEM'). In the past something called potassium hydroxide was a commonly used electrolyte, but recently PEM electrolyzers have become more common.

Alkaline Electrolyzer

PEM Electrolyzer

Advantages of PEM Electrolyzers

One of the reasons that PEM hydrogen generators are so popular is because many of the issues people encounter with PEM fuel cells don't occur. Water that's supplied to the cathode can also be easily used to cool the system, and managing water is much easier because the positive electrode needs to be flooded with water.

Another reason for the popularity of PEM electrolyzers is the high purity of hydrogen produced, which can be > 99.99%.

Disadvantages of PEM Electrolyzers

One issue people run into with PEM Electrolyzers is the presence of water vapour in the system, with water making its way through the electrolyte. To fix this electrolyte designers use various techniques to avoid this, like using wider electrolytes than those used in fuel cells.

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Hydrogen Generators on the Market Today

Conclusion