Product Description
4-Gas Calibration Gas – 25 PPM H2S / 200 PPM CO / 2.5% (50% LEL) CH4 / 20.0% O2 – 66L C-10 Cylinder
This 4-gas calibration gas blend is engineered for facilities requiring mid-level elevated carbon monoxide validation combined with slight atmospheric oxygen variance testing.
With 200 PPM Carbon Monoxide, this mixture supports industrial environments operating with moderate high CO alarm thresholds. The inclusion of 20.0% oxygen introduces a controlled deviation from standard atmospheric baseline, allowing verification of oxygen sensor stability and calibration drift detection without entering hypoxic territory.
Concentration profile:
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25 PPM Hydrogen Sulfide for toxic sensor calibration
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200 PPM Carbon Monoxide for elevated CO alarm validation
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2.5% Methane (50% LEL) for combustible sensor confirmation
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20.0% Oxygen for oxygen variance and baseline deviation testing
Commonly specified for:
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Process ventilation validation
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Industrial combustion safety programs
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Manufacturing facility compliance
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Multi-detector fleet maintenance
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Oxygen sensor drift verification
The 66L cylinder provides balanced capacity for structured multi-sensor calibration cycles in industrial environments.
Gas Concentrations
| Component | Concentration |
|---|---|
| Hydrogen Sulfide (H₂S) | 25 PPM |
| Carbon Monoxide (CO) | 200 PPM |
| Methane (CH₄) | 2.5% (50% LEL) |
| Oxygen (O₂) | 20.0% |
| Balance | Nitrogen |
Cylinder Specifications
| Property | Value |
|---|---|
| Cylinder Size | 66L (2.3 ft³) |
| Pressure | 1150 psi |
| Cylinder Specification | C-10 |
| Cylinder Material | Aluminum |
| Gas Reactivity | Reactive |
Reactive multi-gas blends require compatible C-10 regulators to maintain mixture stability and ensure precise 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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Oxygen baseline deviation testing
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Combustion safety monitoring
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Industrial plant calibration schedules
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Multi-sensor bump testing programs
The 66L format supports repeatable calibration cycles for facilities monitoring both toxic and atmospheric variance conditions.
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.
