Hyperbaric Chamber Pressure Guide: PSI, ATA, and Bar Explained
1. Quick Answer: What Does 13 psi Mean?
When a chamber indicates 13 psi, it typically refers to gauge pressure (the additional pressure added on top of normal air pressure). Once you include the 1 atmosphere we already live in, that works out to about 1.9 ATA. In simple terms: 13 psi ≈ 1.9 ATA total pressure inside the chamber.
2. Why the Units Look Different
ATA (Atmospheres Absolute): The total pressure, including normal air pressure around us.
PSI (Pounds per Square Inch): Often shown as extra pressure above normal air.
Bar: Similar to ATA, 1 bar ≈ 1 atmosphere.
It’s kind of like height measurements—some countries use feet and inches, others use centimeters. Different unit, same meaning.
3. Hyperbaric Pressure Conversion Table
Here’s a quick chart showing common pressure levels and what they’re used for:
| PSI (Gauge) | Total ATA | Bar (Absolute) | Common Use |
|---|---|---|---|
| 0 | 1.0 | 1.01 | Normal air, no therapy effect |
| 4–7 | 1.3–1.5 | 1.32–1.52 | Wellness & recovery (better sleep, fatigue relief) |
| 13 | 1.9 | 1.93 | Rehab use (wound healing, sports recovery) |
| 15 | 2.0 | 2.03 | Professional therapy (chronic fatigue, circulation support) |
| 29 | 3.0 | 3.04 | Hospital emergency use (CO poisoning, serious cases) |
4. What Pressure Level Should You Choose?
For most wellness centers, sports facilities, and home users, chambers run between 1.3 and 2.0 ATA (about 4–15 psi).
This range is considered safe, effective, and easy to use daily. If you see a spec like 13 psi, that means you’re looking at a chamber in the rehab-level range, great for athletes, recovery, and general wellness.
5. Safety and Easy Rules to Remember
Stick to 1 hour or less per session to avoid dizziness.
If you have serious health conditions, always ask your doctor first.
Look for certified chambers (CE, ISO) for safe pressure control.
Choose chambers with simple, one-touch settings—no need to adjust pressure manually.
Final Takeaway
Whether you see psi, ATA, or bar on a hyperbaric chamber, don’t stress. They all describe the same thing: how much extra oxygen-rich pressure you’ll get. Just remember—most users do best in the 1.3–2.0 ATA range, and 13 psi is right in that sweet spot.
Need Help Choosing the Right Hyperbaric Chamber?
If you’re still unsure which pressure level or chamber type fits your needs, don’t worry—we’re here to help. Click below to reach out, and our team will walk you through the options step by step, so you can find the chamber that’s safe, effective, and perfect for your wellness or business.
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