Chamber Comparison
Origin Oxygen UnityvsPerry Baromedical Sigma 40-II
Origin Oxygen
Unity
2
ATA
£79,680 ex VAT (~$98,000 USD)
Starting
2yr
Warranty
Perry Baromedical
Sigma 40-II
3
ATA
$100,000 - $160,000
Starting
1yr
Warranty
The Bottom Line
The Origin Oxygen Unity wins on price, warranty, and weight, while the Perry Baromedical Sigma 40-II takes the edge in max pressure and fda clearance. If price is your priority, the Origin Oxygen Unity is the stronger pick.
Key Differences
Origin Oxygen
2 ATA
Perry Baromedical
3 ATA
Higher pressure enables more clinical protocols. The Perry Baromedical Sigma 40-II reaches 3 ATA, which supports FDA-approved treatment protocols.
Origin Oxygen
£79,680 ex VAT (~$98,000 USD)
Perry Baromedical
$100,000 - $160,000
A ~2% price difference. At this range, the decision likely comes down to features and certifications rather than cost alone.
Origin Oxygen
FDA no
Perry Baromedical
FDA cleared: yes
The listing's fda_cleared field. This page does not add a purchase rule.
Origin Oxygen
2 years
Perry Baromedical
1 year
A longer warranty reduces long-term ownership risk, especially important for chambers in the $10K+ range.
Origin Oxygen
1,654 lbs
Perry Baromedical
3,000 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 40-II
High-volume wound care centers, efficiency-focused clinical programs
View full details →Full Specification Comparison
| Specification | | |
|---|---|---|
| Chamber Type | Hard-Shell Multiplace | Hard-Shell Multiplace |
| Performance Tier | Clinical Grade | Clinical Grade |
| Max Pressure | 2 ATA | 3 ATA★ |
| Oxygen Delivery | mask/cannula | 100%-medical-grade |
| O₂ Concentration | 93-97% | 100% via BIBS with Duke hoods |
| Capacity | 2-person | 2-person |
| Weight | 1,654 lbs★ | 3,000 lbs |
| Interior Dimensions | 2230 × 1900 × 1970 mm | 40.5in diameter, dual-patient |
| Portability | fixed-installation | fixed-installation |
| FDA Cleared | No | Yes (#Multiple 510(k)s)★ |
| CE Marked | No | Yes★ |
| Made In | United Kingdom | United States |
| Price | £79,680 ex VAT (~$98,000 USD) | $100,000 - $160,000★ |
| Warranty | 2 years★ | 1 year |
| Brand Established | — | 1956 |
| Climate Control | Yes | Yes |
| Communication System | Yes | Yes |
| Emergency Features | — | Emergency depressurization, fire suppression, dual BIBS, multiple safety interlocks |
Origin Oxygen Unity — Standout Features
Perry Baromedical Sigma 40-II — Standout Features
Interested in either chamber?
Request quotes from both manufacturers and compare real pricing.
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