Product Description
4-Gas Calibration Gas – 25 PPM H2S / 50 PPM CO / 2.5% (50% LEL) CH4 / 17.0% O2 – 66L C-10 Cylinder
This 4-gas calibration gas blend is engineered for advanced bump testing and full calibration of portable multi-gas monitors used in confined space entry and industrial safety programs.
Containing 17.0% oxygen, this mixture simulates extreme oxygen-deficient atmospheric conditions far below OSHA’s 19.5% threshold. It allows technicians to validate oxygen alarm activation under severe depletion scenarios while simultaneously verifying toxic and combustible sensor response.
Concentration profile:
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25 PPM Hydrogen Sulfide for toxic exposure sensor validation
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50 PPM Carbon Monoxide calibration for conservative CO alarm setpoints
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2.5% Methane (50% LEL) for combustible sensor accuracy
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17.0% Oxygen for extreme oxygen-deficiency simulation
This blend is commonly specified for confined space rescue drills, emergency response simulations, and industrial safety programs requiring aggressive oxygen alarm verification.
The 66L cylinder balances portability with sufficient 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) | 17.0% |
| 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 should be used with 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 instruments from BW, MSA, Industrial Scientific, RAE Systems, and Dräger.
Common applications include:
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Extreme oxygen-deficiency alarm verification
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Confined space rescue simulation
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Emergency response training
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Advanced safety compliance programs
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Multi-sensor calibration programs
The 66L format supports portable deployment while maintaining sufficient capacity for field operations.
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 built to your detector model, regulatory requirements, or site-specific hazard profile.
