Product Description
66L 4-Gas Calibration Gas with 19.5% Oxygen – OSHA Threshold Verification Blend
This 66 Liter reactive 4-gas calibration cylinder is formulated to validate oxygen-deficiency alarms at the critical 19.5% threshold, alongside toxic and combustible sensor channels.
Gas blend includes:
-
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%
-
Nitrogen Balance
The 19.5% oxygen level is the OSHA-defined lower safe limit for breathable air. This blend allows safety teams to confirm that oxygen sensors trigger correctly before confined space entry or hazardous environment exposure.
With 1150 PSI fill pressure and 2.3 cubic feet of volume, this 66L cylinder provides balanced portability and sufficient capacity for recurring bump testing cycles.
Gas Concentration Specifications
| 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 | 66 Liters |
| Pressure | 1150 PSI |
| Valve Type | C-10 |
| Cylinder Material | Aluminum |
| Gas Reactivity | Reactive |
| Approximate Volume | 2.3 Cubic Feet |
Designed For Critical Safety Validation
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Confined space entry programs
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Oxygen-deficiency alarm testing
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Industrial hygiene compliance
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Utility and wastewater facilities
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Oil & gas field operations
Compatible with standard C-10 demand flow regulators and major multi-gas monitoring platforms.
Why the 19.5% Oxygen Blend Matters
• Validates OSHA oxygen alarm thresholds
• Tests toxic + LEL + O₂ channels in one cylinder
• Portable 66L size for field technicians
• Reactive formulation supports stable detector response
If your safety program requires alternate oxygen thresholds, different cylinder volumes, or custom toxic gas levels, contact our team for rapid blend production.
