Product Description
4-Gas Calibration Gas – 25 PPM H2S / 50 PPM CO / 2.5% (50% LEL) CH4 / 15.0% O2 – 44L C-10 Cylinder
This 4-gas calibration gas blend is engineered for confined space pre-entry validation and portable multi-gas monitor calibration.
With 15.0% oxygen, this mixture simulates severe atmospheric oxygen depletion to verify rapid low-O₂ alarm activation and sensor response accuracy. It allows safety professionals to confirm that oxygen alarms trigger appropriately under aggressive depletion scenarios while simultaneously validating toxic and combustible detection channels.
Concentration profile:
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25 PPM Hydrogen Sulfide for toxic exposure sensor verification
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50 PPM Carbon Monoxide for conservative CO alarm confirmation
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2.5% Methane (50% LEL) for combustible channel accuracy
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15.0% Oxygen to validate severe hypoxic alarm thresholds
This blend is commonly specified for:
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Permit-required confined space entry programs
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Safety inspections and compliance audits
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Contractor fleet monitor calibration
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Industrial maintenance safety validation
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Emergency preparedness drills
The 44L cylinder offers a compact, field-friendly option for technicians requiring severe hypoxic simulation without transitioning to larger-capacity cylinders.
Gas Concentrations
| Component | Concentration |
|---|---|
| Hydrogen Sulfide (H₂S) | 25 PPM |
| Carbon Monoxide (CO) | 50 PPM |
| Methane (CH₄) | 2.5% (50% LEL) |
| Oxygen (O₂) | 15.0% |
| Balance | Nitrogen |
Cylinder Specifications
| Property | Value |
|---|---|
| Cylinder Size | 44L (1.5 ft³) |
| Pressure | 750 psi |
| Cylinder Specification | C-10 |
| Cylinder Material | Aluminum |
| Gas Reactivity | Reactive |
Reactive multi-gas blends should be paired with compatible C-10 regulators to ensure mixture integrity and calibration precision.
Applications & Detector Compatibility
Compatible with leading portable multi-gas detection instruments from BW, MSA, Industrial Scientific, RAE Systems, and Dräger.
Ideal for:
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Severe low-oxygen alarm validation
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Confined space compliance testing
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Portable bump testing programs
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Multi-sensor calibration verification
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Industrial safety audits
The 44L format supports efficient field deployment while providing sufficient volume for repeat calibration cycles.
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.
