Why Oxygen Purity Matters

If you use oxygen concentrators—for glass blowing, torchwork, or other flame-based work—oxygen purity directly affects how your flame behaves.

But there’s a catch:

Oxygen concentrators produce higher purity at lower flow rates.

As you turn the flow up, purity usually starts to drop. Without a way to measure purity, you’re guessing where that trade-off happens.

That’s where the FlameDex Oxygen Meter comes in.

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What the FlameDex Oxygen Meter Does

The FlameDex Oxygen Meter is a portable, handheld meter you can use to spot-check the purity of the oxygen coming from your concentrators.

You don’t install it in your system. You simply:

1. Connect it to the oxygen output you want to test.
2. Read the purity on the screen.
3. Adjust your concentrator or diagnose issues based on what you see.

Use it whenever you want to confirm that your concentrator is doing what you expect.

If you are having trouble using your FlameDex, download the Quick Start Guide here.

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Dialing In Flow vs. Purity

You don’t set purity on the FlameDex—you decide what purity you want for your work, then use the meter to see what your concentrator is actually delivering.

A simple way to use it:

1. Decide the minimum purity you’re comfortable with (for example, what you aim for on a healthy machine).
2. Start your concentrator at a lower flow and check purity with FlameDex.
3. Slowly increase the flow and spot-check again.
4. When the purity drops below what you want, back off the flow slightly.

Now you’ve found the highest flow that still gives you the purity you’re after for that concentrator.

You can repeat this on different concentrators to see:

• Which unit can support more flow
• Which one starts losing purity earlier and may need service

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Flame Temperature Display: Turning Purity Into Torch Performance

FlameDex doesn’t just show an oxygen percentage. It also calculates and displays flame temperature for a selected fuel gas, such as:

• Propane
• Natural gas
• Acetylene

This is based on the measured purity of the oxygen you’re testing.

That means you can look at the meter and understand, in practical terms:

• How hot your flame will be at that purity
• How changes in flow (and purity) might affect your working heat

Instead of just saying, “My oxygen is at 93%,” you can say, “At this purity with this gas, this is the kind of flame I’m getting.”

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A Simple Way to Take Control of Oxygen Purity

The FlameDex Oxygen Meter gives you accurate, real-time purity and flame temperature readings whenever you choose to test.

That lets you:

• Stop guessing about your concentrators
• Make better decisions about flow and maintenance
• Work with more confidence at the torch

For anyone relying on oxygen concentrators, the FlameDex is a powerful, handheld tool to help get the highest practical purity at the highest usable flow—on your terms, whenever you need to check.