Product Description
4-Gas Calibration Gas – 25 PPM H2S / 50 PPM CO / 2.5% (50% LEL) CH4 / 16.0% O2 – 60L C-10 Cylinder
This 4-gas calibration gas blend is formulated for controlled hypoxic condition validation during multi-gas monitor calibration and bump testing.
With 16.0% oxygen, this mixture models progressive atmospheric oxygen depletion encountered in high-risk confined space environments. It allows safety professionals to confirm low-O₂ alarm activation prior to IDLH-level exposure while simultaneously verifying toxic and combustible sensor response curves.
Concentration profile:
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25 PPM Hydrogen Sulfide for electrochemical H₂S sensor verification
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50 PPM Carbon Monoxide for conservative CO threshold validation
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2.5% Methane (50% LEL) to confirm catalytic bead or IR combustible sensor accuracy
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16.0% Oxygen to validate falling-atmosphere response and alarm escalation
This blend is frequently specified for:
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High-risk confined space entry programs
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Wastewater and utility vault safety testing
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Rescue team certification drills
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Facilities operating internal oxygen alarms below OSHA minimum thresholds
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Advanced EHS compliance audits
The 60L cylinder offers a mid-capacity option ideal for safety teams requiring repeated calibration cycles without the footprint of larger 116L or 120L cylinders.
Gas Concentrations
| Component | Concentration |
|---|---|
| Hydrogen Sulfide (H₂S) | 25 PPM |
| Carbon Monoxide (CO) | 50 PPM |
| Methane (CH₄) | 2.5% (50% LEL) |
| Oxygen (O₂) | 16.0% |
| 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 should be paired with compatible C-10 regulators to maintain mixture stability and calibration precision.
Applications & Detector Compatibility
Compatible with major portable multi-gas instruments used for confined space entry and industrial monitoring, including BW, MSA, Industrial Scientific, RAE Systems, and Dräger platforms.
Ideal for:
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Low-oxygen alarm stress testing
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Multi-sensor calibration validation
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Utility and municipal safety programs
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Tank entry and vault inspection protocols
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Industrial EHS audit preparation
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, site conditions, or regulatory standards.
