Product Description
4-Gas Calibration Gas – 25 PPM H2S / 50 PPM CO / 2.5% CH4 /(50% LEL) / 20.9% O2 – 34L C-10 Disposable 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.
The concentration profile supports facilities operating with lower carbon monoxide alarm thresholds:
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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 setpoints
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2.5% Methane (50% LEL) for combustible sensor accuracy
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20.9% Oxygen for atmospheric baseline confirmation
This blend aligns with OSHA confined space monitoring requirements across wastewater facilities, oil & gas operations, utilities, and industrial manufacturing environments.
The 34L disposable cylinder provides a compact, lightweight calibration solution ideal for field technicians, mobile safety kits, and lower-volume calibration programs.
Gas Concentrations
| Component | Concentration |
|---|---|
| Hydrogen Sulfide (H₂S) | 25 PPM |
| Carbon Monoxide (CO) | 50 PPM |
| Methane (CH₄) | 2.5% (50% LEL) |
| Oxygen (O₂) | 20.9% |
| Balance | Nitrogen |
Cylinder Specifications
| Property | Value |
|---|---|
| Cylinder Size | 34L (1.2 ft³) |
| Pressure | 500 psi |
| Cylinder Specification | C-10 |
| Cylinder Material | Aluminum |
| Gas Reactivity | Reactive |
| Cylinder Type | Disposable |
Reactive multi-gas blends should be stored and used with compatible C-10 regulators to preserve mixture stability and ensure calibration accuracy.
Applications & Detector Compatibility
This 4-gas calibration gas supports 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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Daily bump testing
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Scheduled sensor calibration
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OSHA confined space compliance
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Lower CO alarm verification
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Portable service fleet calibration
The 34L size is especially suited for lightweight deployment and quick-response safety programs.
Need a Different Concentration or Cylinder Size?
If you do not see the exact gas mixture, ppm level, LEL percentage, 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.
