GasBlender

What This Course Is

Here's something that surprises a lot of divers: the vast majority of people using nitrox have never made a single mix themselves. They hand over a cylinder, someone else fills it, they analyse it on the way in, and that's the extent of their gas knowledge. Which is fine — until something goes wrong or until you want to actually understand what you're breathing.

The TDI Gas Blender course covers the practical skills and theory behind blending nitrox mixes safely. We're talking partial pressure blending, continuous flow blending, understanding the equipment involved, and — critically — oxygen compatibility and cleanliness standards. High-percentage oxygen is not forgiving of dirty equipment or shortcuts. This course is about understanding why, not just following a checklist.

It's a one-day course and it's very practical. By the end of it you'll have actually blended gas, not just listened to someone talk about blending gas. Malta has the facilities to run this properly, and it's a course that makes more sense when you can connect the theory to actual cylinders and actual fills.

If you're heading into technical diving — Advanced Nitrox, Decompression Procedures, and beyond — understanding how your gas is made is genuinely useful knowledge. It makes you a better diver and a better team member.

What You'll Cover

• Oxygen physics and properties — why high-percentage oxygen behaves differently, fire and explosion risk, what makes it dangerous and how to handle it safely
• Partial pressure blending — the maths and the method, blending from oxygen and air to a target mix
• Continuous flow blending — an alternative approach, when it's used and how it works
• Gas analysis — using an oxygen analyser correctly, understanding what you're measuring and why it matters
• Oxygen-clean equipment — what O2 service means, why it's required above 40% oxygen, how to identify equipment that needs servicing
• Record keeping and labelling — the administrative side of gas blending, cylinder documentation, mix labelling
• Quality control — verifying your blend, what to do if the analysis doesn't match the target

What You Need Beforehand

• Open Water certification or equivalent
• Age 18+
• A basic Nitrox card is helpful but not mandatory — the course covers enough background to make sense without it

What It Opens Up

Gas Blender gives you a qualification to blend nitrox mixes independently. More practically, it gives you the knowledge to understand what's in your cylinders and have an informed conversation with whoever's filling them. If you want to go further with gas blending — helium mixes, trimix — the Advanced Gas Blender course builds directly on this one.