Product Description
4-Gas Calibration Gas – 25 PPM H2S / 50 PPM CO / 2.5% (50% LEL) CH4 / 16.0% O2 – 120L C-10 Cylinder
This 4-gas calibration gas blend is engineered for extended-cycle calibration programs and large-scale multi-gas monitor fleet management.
With 16.0% oxygen, this mixture replicates advanced hypoxic atmospheric conditions to validate low-oxygen alarm response under severe depletion testing protocols. It allows EHS teams to confirm oxygen sensor activation accuracy while simultaneously verifying toxic and combustible channel performance.
Concentration profile:
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25 PPM Hydrogen Sulfide for H₂S toxic exposure calibration
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50 PPM Carbon Monoxide for conservative CO threshold validation
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2.5% Methane (50% LEL) for combustible sensor confirmation
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16.0% Oxygen to validate deep low-O₂ alarm activation
This blend is commonly specified for:
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Industrial facilities running continuous confined space operations
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Multi-shift manufacturing plants
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Utility infrastructure programs
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Oil & gas midstream safety departments
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Large contractor fleets managing multiple detectors
The 120L cylinder is optimized for high-consumption calibration environments, reducing cylinder change frequency and supporting large safety programs.
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 | 120L (4.2 ft³) |
| Pressure | 1050 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 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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Large-scale oxygen alarm validation programs
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Fleet-wide bump testing schedules
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Industrial plant turnaround audits
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Confined space compliance programs
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High-volume calibration operations
The 120L format supports extended deployment in demanding industrial environments.
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.
