Product Description
4-Gas Calibration Gas – 25 PPM H2S / 250 PPM CO / 2.5% (50% LEL) CH4 / 20.9% O2 – 34L C-10 Cylinder
This 4-gas calibration gas blend is engineered for elevated carbon monoxide alarm validation in portable and contractor-based safety programs.
With 250 PPM Carbon Monoxide, this mixture supports facilities operating with higher CO alarm thresholds or validating worst-case combustion exposure scenarios. The 20.9% oxygen concentration maintains atmospheric baseline conditions, ensuring toxic and combustible channel testing occurs under normal ambient oxygen reference.
Concentration profile:
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25 PPM Hydrogen Sulfide for H₂S toxic sensor verification
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250 PPM Carbon Monoxide for high-threshold CO calibration
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2.5% Methane (50% LEL) for combustible channel accuracy
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20.9% Oxygen for atmospheric baseline confirmation
Commonly used for:
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Boiler and combustion system testing
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Engine exhaust exposure monitoring
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Portable detector fleet maintenance
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Contractor compliance programs
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Industrial safety audits
The 34L disposable cylinder offers a compact, field-ready solution for technicians who require reliable high-CO validation without managing larger-capacity inventory.
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 | 34L (1.2 ft³) |
| Pressure | 500 psi |
| Cylinder Specification | C-10 |
| Cylinder Material | Aluminum |
| Gas Reactivity | Reactive |
| Cylinder Type | Disposable |
Reactive multi-gas blends should be paired with compatible C-10 regulators to maintain mixture integrity and calibration precision.
Applications & Detector Compatibility
Compatible with leading portable multi-gas detection platforms from BW, MSA, Industrial Scientific, RAE Systems, and Dräger.
Ideal for:
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Elevated CO alarm validation
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Combustion safety programs
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Multi-sensor bump testing
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Industrial compliance inspections
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Portable monitor fleet calibration
The 34L format provides manageable, disposable calibration capacity for smaller safety operations and field technicians.
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.
