Product Description
4-Gas Calibration Gas – 25 PPM H2S / 250 PPM CO / 2.5% (50% LEL) CH4 / 20.9% O2 – 60L C-10 Cylinder
This 4-gas calibration gas blend is engineered for high carbon monoxide threshold validation in industrial and combustion-heavy environments.
With 250 PPM Carbon Monoxide, this mixture supports calibration programs operating with elevated CO alarm setpoints or testing worst-case exposure conditions. The inclusion of 20.9% oxygen maintains normal atmospheric baseline levels, ensuring that toxic and combustible sensor validation occurs without oxygen-depletion influence.
Concentration profile:
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25 PPM Hydrogen Sulfide for toxic channel verification
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250 PPM Carbon Monoxide for high CO alarm calibration
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2.5% Methane (50% LEL) for combustible sensor accuracy
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20.9% Oxygen for atmospheric reference stability
Commonly specified for:
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Boiler rooms and engine exhaust monitoring
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Manufacturing and heavy industrial operations
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Refinery and energy-sector safety programs
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Industrial maintenance calibration schedules
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Multi-detector fleet validation
The 60L cylinder provides efficient volume for repeated high-CO calibration cycles while maintaining manageable storage and deployment requirements.
Gas Concentrations
| Component | Concentration |
|---|---|
| Hydrogen Sulfide (H₂S) | 25 PPM |
| Carbon Monoxide (CO) | 250 PPM |
| Methane (CH₄) | 2.5% (50% LEL) |
| Oxygen (O₂) | 20.9% |
| Balance | Nitrogen |
Cylinder Specifications
| Property | Value |
|---|---|
| Cylinder Size | 60L (2.1 ft³) |
| Pressure | 1000 psi |
| Cylinder Specification | C-10 |
| Cylinder Material | Aluminum |
| Gas Reactivity | Reactive |
Reactive multi-gas blends require compatible C-10 regulators to maintain mixture integrity and ensure consistent calibration performance.
Applications & Detector Compatibility
Compatible with leading portable and fixed multi-gas detection systems from BW, MSA, Industrial Scientific, RAE Systems, and Dräger.
Ideal for:
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Elevated CO alarm validation
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Combustion system monitoring
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Industrial plant compliance testing
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Multi-sensor bump testing
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Process safety management programs
The 60L format supports structured high-CO calibration without transitioning to high-capacity cylinders.
Need a Different Concentration or Cylinder Size?
If you do not see the exact gas mixture, ppm level, oxygen percentage, LEL value, or cylinder size required for your application, contact our calibration gas specialists. We can supply custom multi-gas blends tailored to your detector model, regulatory requirements, or site-specific hazard profile.
