Chamber Comparison
Oxygen Ark 901vsPerry Baromedical Sigma 36
Oxygen Ark
901
1.5
ATA
$18K
Starting
1yr
Warranty
Perry Baromedical
Sigma 36
3
ATA
$55K
Starting
1yr
Warranty
The Bottom Line
The Oxygen Ark 901 wins on price and weight, while the Perry Baromedical Sigma 36 takes the edge in max pressure, fda clearance, and clinical credibility. If max pressure matters most, the Perry Baromedical Sigma 36 is the better choice.
Key Differences
Oxygen Ark
1.5 ATA
Perry Baromedical
3 ATA
Higher pressure enables more clinical protocols. The Perry Baromedical Sigma 36 reaches 3 ATA, which supports FDA-approved treatment protocols.
Oxygen Ark
$18,000 - $28,000 (estimated)
Perry Baromedical
$55,000 - $95,000
A significant price gap of ~67%. Consider whether the higher-priced unit's additional features justify the investment for your use case.
Oxygen Ark
Not FDA Cleared
Perry Baromedical
FDA Cleared
FDA clearance matters if you need insurance reimbursement, plan to operate a clinical facility, or want the highest safety assurance. For home wellness use, it's less critical.
Oxygen Ark
3/10
Perry Baromedical
9/10
This score reflects published studies, certifications, and clinical adoption. Higher scores indicate stronger evidence backing the manufacturer's claims.
Oxygen Ark
187 lbs
Perry Baromedical
2,500 lbs
Weight matters for portability and installation. Lighter chambers are easier to move between rooms or take to a second location.
Who Should Buy Which?
Best for
Perry Baromedical Sigma 36
Hospitals, larger patients, reduced claustrophobia
View full details →Full Specification Comparison
| Specification | Oxygen Ark 901 | Perry Baromedical Sigma 36 |
|---|---|---|
| Chamber Type | Hard-Shell Monoplace | Hard-Shell Monoplace |
| Performance Tier | Clinical Grade | Clinical Grade |
| Max Pressure | 1.5 ATA | 3 ATA★ |
| Oxygen Delivery | mask/cannula | 100%-medical-grade |
| O₂ Concentration | Up to 95% | 100% via BIBS with Duke hoods |
| Capacity | 1-person | 1-person |
| Weight | 187 lbs★ | 2,500 lbs |
| Interior Dimensions | — | 36in diameter |
| Portability | fixed-installation | fixed-installation |
| FDA Cleared | No | Yes (#Multiple 510(k)s)★ |
| CE Marked | Yes | Yes |
| Made In | China | United States |
| Price | $18,000 - $28,000 (estimated)★ | $55,000 - $95,000 |
| Warranty | 1 year | 1 year |
| Clinical Score | 3/10 | 9/10★ |
| Brand Established | — | 1956 |
| Climate Control | No | Yes★ |
| Communication System | No | Yes★ |
| Emergency Features | — | Emergency depressurization, fire suppression, BIBS system, multiple safety interlocks |
Oxygen Ark 901 — Standout Features
Perry Baromedical Sigma 36 — Standout Features
Interested in either chamber?
Request quotes from both manufacturers and compare real pricing.
Request Quotes →Related Comparisons
HPO TECH Zeugma
vs
Oxygen Ark 901
HPO TECH Zeugma
vs
Perry Baromedical Sigma 36
Oxygen Ark 901
vs
OxyHelp OxyLife I/90
OxyHelp OxyLife I/90
vs
Perry Baromedical Sigma 36
Oxygen Ark 901
vs
OxyHelp OxyLife I/80
OxyHelp OxyLife I/80
vs
Perry Baromedical Sigma 36
Oxygen Ark 901
vs
Sechrist Industries 3600H
Perry Baromedical Sigma 36
vs
Sechrist Industries 3600H