Sigma 40

World's largest monoplace (40.5in dia)3.0 ATAmaximum comfortzero claustrophobia

Description on file

Stored directory description. It is not a test we ran of this chamber.

The Sigma 40 is the largest monoplace hyperbaric chamber available worldwide, with a 40.5-inch diameter bore. This exceptional width virtually eliminates claustrophobia and accommodates patients of all sizes, including those with mobility aids. Maintains full 3.0 ATA capability with 100% oxygen delivery. The gold standard for patient comfort in monoplace HBOT.

Who is this for?

Designed with patient comfort as the primary concern — especially suited for bariatric patients, individuals who experience claustrophobia, or any program where the patient experience is a retention factor. The extra-wide interior gives larger patients genuine comfort during longer treatment sessions without feeling confined. Clinical facilities focused on serving the full range of body types and reducing patient anxiety will find the Sigma 40 purpose-built for exactly that.

Who it suits

Sigma 40 is a hard-shell monoplace chamber, listed at 3 ATA, in the $50,000 and above listed-price band, with a listed capacity of 1-person, listed interior size 40.5in diameter (largest monoplace available).

The listing describes who it is for as: Designed with patient comfort as the primary concern — especially suited for bariatric patients, individuals who experience claustrophobia, or any program where the patient experience is a retention factor. The extra-wide interior gives larger patients genuine comfort during longer treatment sessions without feeling confined. Clinical facilities focused on serving the full range of body types and reducing patient anxiety will find the Sigma 40 purpose-built for exactly that.

This is not medical advice. Ask your doctor which pressure and setting fit you, and read the Carbon Monoxide Poisoning guide.

Who should skip it

Listed portability is fixed-installation, so this is not a portable chamber.
The low price estimate is $65,000, so this is not a chamber listed under $25,000.
Listed tier is clinical-grade, so this is not an entry-level home wellness chamber.

Estimated Price

$65,000 - $110,000

Financing: Leasing and financing available for medical facilities

Among 16 hard-shell monoplace chambers with a listed low price in the $50,000 and above band, those low prices run from $50,000 to $90,000. This chamber's listed low price is $65,000.

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Used for

Based on the protocol pressure and tier this chamber supports. FDA-approved indications marked.

Closest listed alternatives

Same chamber type and listed-price band. Sorted by how close the listed low price and pressure are.

Chamber	Type	ATA	Listed price	Compare
Sechrist Industries 3300H	hard-shell monoplace	3	$60,000 - $100,000	Compare
Sechrist Industries 3600H	hard-shell monoplace	3	$70,000 - $110,000	Compare
HPO TECH Matrix Hard	hard-shell monoplace	3	Custom quote (est. $70,000 - $130,000)	Compare

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Questions from the listing

What maximum pressure is listed for the Sigma 40?

The Sigma 40 listing shows a maximum pressure of 3 ATA.

What price is listed for the Sigma 40?

The listing shows $65,000 - $110,000.

Is the Sigma 40 listed as FDA cleared?

In the HBOT Finder database, FDA clearance for the Sigma 40 is "yes". The listed clearance number is Multiple 510(k)s.

What type of chamber is the Sigma 40?

The Sigma 40 is listed as a hard-shell monoplace chamber.

What size is listed for the Sigma 40?

The listing gives capacity 1-person and interior dimensions 40.5in diameter (largest monoplace available).

Does this page say whether the Sigma 40 is right for a medical condition?

No. This page only repeats the chamber's listed specifications. Ask your doctor before using hyperbaric oxygen therapy. Condition guides on this site summarize published research and are not personal medical advice.