Product Description
4-Gas Calibration Gas – 25 PPM H2S / 50 PPM CO /Methane (CH₄) 2.5% (50% LEL) / 19.0% O2 – 60L C-10 Cylinder
This 4-gas calibration gas blend is engineered for bump testing and full calibration of portable multi-gas monitors used in confined space and industrial safety programs.
Containing 19.0% oxygen, this blend simulates reduced-oxygen atmospheric conditions below the OSHA 19.5% deficiency threshold. It enables technicians to validate oxygen alarm activation at deeper depletion levels while simultaneously verifying toxic and combustible sensor performance.
Concentration profile:
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25 PPM Hydrogen Sulfide for toxic 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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19.0% Oxygen for reduced-atmosphere simulation
This blend is commonly used for advanced confined space training, facility safety audits, and environments requiring aggressive oxygen alarm verification.
The 60L cylinder offers a practical balance between portability and calibration longevity for mobile safety teams and mid-volume monitoring programs.
Gas Concentrations
| Component | Concentration |
|---|---|
| Hydrogen Sulfide (H₂S) | 25 PPM |
| Carbon Monoxide (CO) | 50 PPM |
| Methane (CH₄) | 2.5% (50% LEL) |
| Oxygen (O₂) | 19.0% |
| 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 stored and 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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Reduced-oxygen alarm verification
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Confined space compliance testing
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Safety training simulations
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Scheduled multi-sensor calibration
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Industrial hygiene audits
The 60L format provides sufficient calibration volume for repeated bump testing while remaining field-deployable.
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.
