Product Description
44L 4-Gas Calibration Gas – 19.5% Oxygen for Confined Space Alarm Testing
This 44 Liter reactive 4-gas calibration cylinder is designed for field technicians and contractors who must verify oxygen-deficiency alarms at 19.5% O₂, the OSHA-defined minimum safe oxygen level.
Gas blend includes:
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Hydrogen Sulfide (H₂S) – 10 PPM
-
Carbon Monoxide (CO) – 50 PPM
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Methane (CH₄) – 2.5% (50% LEL)
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Oxygen (O₂) – 19.5%
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Nitrogen Balance
The reduced oxygen concentration enables precise validation of oxygen sensors while simultaneously testing toxic and combustible detection channels during bump testing or scheduled calibration.
With 750 PSI and 1.5 cubic feet of capacity, the 44L format offers controlled output and easy handling for mobile calibration environments.
Gas Concentration Summary
| Gas | Concentration |
|---|---|
| Hydrogen Sulfide (H₂S) | 10 PPM |
| Carbon Monoxide (CO) | 50 PPM |
| Methane (CH₄) | 2.5% (50% LEL) |
| Oxygen (O₂) | 19.5% |
| Balance | Nitrogen |
Cylinder Specifications
| Specification | Detail |
|---|---|
| Cylinder Size | 44 Liters |
| Pressure | 750 PSI |
| Valve Type | C-10 |
| Cylinder Material | Aluminum |
| Gas Reactivity | Reactive |
| Approximate Volume | 1.5 Cubic Feet |
Recommended For
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Contractor safety programs
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Utility field teams
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Wastewater confined space entry
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Portable gas detector maintenance
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OSHA compliance verification
Compatible with standard C-10 demand flow regulators used across major multi-gas monitor platforms.
Why the 44L 19.5% Blend Is a Smart Choice
• Confirms oxygen alarm activation at deficiency threshold
• Balanced for smaller or mobile calibration programs
• Reactive mixture supports stable detector response
• Lower PSI configuration allows controlled regulator flow
If you require a higher-capacity cylinder, alternative PSI rating, or modified gas ratios, contact our calibration team for custom blend options.
