Product Description
4-Gas Calibration Gas – 25 PPM H2S / 50 PPM CO / 2.5% (50% LEL) CH4 / 16.0% O2 – 66L C-10 Cylinder
This 4-gas calibration gas blend is engineered for precision bump testing and full calibration of portable multi-gas monitors used in confined space entry and industrial safety programs.
Containing 16.0% oxygen, this mixture replicates critical oxygen-deficient atmospheric conditions well below OSHA’s 19.5% threshold and deeper than typical training mixtures. It allows safety professionals to validate oxygen alarm activation under severe hypoxic simulation while simultaneously confirming toxic and combustible sensor accuracy.
Concentration profile:
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25 PPM Hydrogen Sulfide for toxic exposure sensor validation
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50 PPM Carbon Monoxide for conservative CO alarm calibration
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2.5% Methane (50% LEL) for combustible sensor verification
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16.0% Oxygen for critical oxygen-deficiency simulation
This blend is commonly specified for:
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Confined space rescue drills
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Advanced emergency response simulation
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Industrial safety certification programs
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Facilities validating aggressive oxygen alarm thresholds
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Multi-sensor fleet calibration
The 66L cylinder offers balanced portability and volume for repeated field calibration cycles.
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 | 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 calibration precision.
Applications & Detector Compatibility
Compatible with most major portable multi-gas monitors used for toxic, combustible, and oxygen detection, including BW, MSA, Industrial Scientific, RAE Systems, and Dräger.
Ideal for:
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Critical oxygen-deficiency alarm validation
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Rescue training simulations
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Confined space certification programs
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High-compliance industrial safety operations
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Multi-unit detector calibration schedules
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 standards, or site-specific safety requirements.
