Product Description
4-Gas Calibration Gas – 25 PPM H2S / 50 PPM CO / Methane (CH₄) 2.5% (50% LEL) / 19.0% O2 – 116L C-10 Cylinder
This 4-gas calibration gas blend is engineered for routine bump testing and full calibration of portable multi-gas monitors used in confined space and industrial safety programs.
Containing 19.0% oxygen, this mixture simulates reduced-atmosphere conditions below the OSHA 19.5% oxygen-deficiency threshold. It allows technicians to validate oxygen alarm activation at more aggressive depletion levels while simultaneously verifying toxic and combustible sensor performance.
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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19.0% Oxygen for reduced-oxygen environment simulation
This blend is widely specified for advanced confined space training, industrial hygiene audits, and safety departments requiring deeper oxygen alarm verification.
The 116L cylinder supports extended calibration cycles and high-volume bump testing programs while remaining manageable for industrial deployment.
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 | 116L (4.0 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 preserve mixture stability and maintain calibration accuracy.
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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High-volume daily bump testing
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Facility-wide gas detection fleet management
The 116L format is ideal for operations running multiple detectors across departments or continuous shift 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 built to your detector model, regulatory requirements, or site-specific hazard profile.
