Understand the 1.5 ATA number before buying
When you see information like 1.5 ata hyperbaric chamber for sale, your first reaction should not be to rush to place an order. You must first understand this pressure number. ATA is short for atmospheres absolute, which refers to absolute pressure measured at zero point in absolute vacuum. 1 ATA is a standard atmosphere of pressure, with an exact value of 101.325 kPa, which is approximately equal to 14.6959 psi. On this basis, the absolute pressure of 1.5 ATA is 151.9875 kPa, or approximately 22.04 psia.
The easiest pit to step on here is the pressure caliber. Absolute pressure and gauge pressure are two different things. Gauge pressure is the difference between the pressure in the cabin minus the local atmospheric pressure. At standard sea level, a gauge pressure of only about 7.35 psig corresponds to 1.5 ATA. That is, a device marked 1.5 ATA, read with gauge pressure, would only have a few psi left at seven. Conversely, if you look at the hyperbaric chamber 12 psi, 12 is usually read by gauge pressure, which translates to an absolute pressure of about 1.8 ATA up and down, which is actually a fraction higher than 1.5 ATA. The pressure caliber in the specification table is not uniform, which is the easiest part to make mistakes when purchasing.
1.5 ATA is mainly sold in two categories of products
After locking the 1.5 ATA, you’ll find it appearing on both the software and hardware pods’ sales listings. On the soft compartment side, 1.5 ATA is the upper limit of the low-pressure section. Taking MACY-PAN products as an example, the model ST801 is a single-person portable horizontal soft cabin with pressure specifications covering 1.3, 1.4 and 1.5 ATA. The cabin body is made of TPU material, weighs 13 kg, is about 220 cm long and 80 cm in diameter when unfolded, and has a nominal upper noise limit of 45 decibels; the ST901 is its widened version, with a diameter of 90 cm and a weight of 15 kg. This type of cabin can be folded and stored, making it easier to move and store.
On the hardware compartment side, 1.5 ATA is the starting point. The pressure specifications of the stainless steel-based rigid horizontal cabin usually start from 1.5 ATA and are more concentrated in 2.0 ATA; while the vertical and multi-person rigid cabin are basically designed according to 2.0 ATA. So, it is also 1.5 ATA. One may be a soft cabin that can be folded away, and the other may be a fixed stainless steel hardware cabin. The two are very different in structure, oxygen supply method and use. When you see a 1.5 ATA on sale, the first thing to do is to tell whether it is software or hardware.
How to choose 1.5 ATA and 2.0 ATA
When buying a hyperbaric oxygen chamber, many people hesitate between 1.5 ATA and 2.0 ATA. This is actually due to the difference in use boundaries. Clinical hyperbaric oxygen requires patients to breathe medical-grade oxygen in a hard body compartment at a pressure of no less than 2.0 ATA, so 2.0 ATA is a hard threshold for therapeutic hyperbaric oxygen. The 1.5 ATA is still below this threshold. Regardless of software or hardware, the pressure figure alone cannot be used as a clinical treatment module.
If you see specifications like 2 ata hyperbaric chamber for sale, 2.0 ata hyperbaric chamber for sale, or hyperbaric chamber 2 ata for sale when comparing prices, they basically refer to the same 2.0 ATA pressure, just with the word order of pressure and chamber reversed. Looking at these 2.0 ATA pending orders and 1.5 ATA together, the most important thing is to recognize the pressure threshold: 2.0 ATA is the starting point of clinical hyperbaric oxygen, and 1.5 ATA belongs to the common section of low-pressure soft capsules. Which paragraph you want determines which type of pending order you should focus on.
What to check item by item before placing an order
After deciding to buy 1.5 ATA, there are a few things to write down on your checklist. To distinguish whether ATA is absolute pressure, psi is gauge pressure or absolute pressure, it is best to let the supplier give the full conversion. The complete parameters cannot be represented by just one 1.5 ATA figure either, and one device should also indicate the normal operating pressure, the maximum permissible operating pressure and the set pressure of the pressure relief device.
Compliance status is also checked. The U.S. market can query 510(k) records for specific devices by product code CBF and note that 510(k) cleared and FDA approved are two different things. Don’t take the scope of a single 510(k) license and assume it’s being extended to other brands, models, or other uses.
Finally, back to the usage scenario. The software 1.5 ATA cabin needs to be operated according to the specific model instructions, continuously monitored by qualified personnel, and equipped with fire protection and grounding measures in a high-concentration oxygen environment; the hardware cabin needs to verify the installation conditions and professional management requirements. By comparing the pressure, structure, purpose and compliance status, this 1.5 ATA on-sale information is truly understood.
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