Product Description
4-Gas Calibration Gas – 25 PPM H2S / 50 PPM CO / 2.5% (50% LEL) CH4 / 18.0% O2 – 34L C-10 Disposable Cylinder
This 4-gas calibration gas blend is engineered for bump testing and full calibration of portable multi-gas monitors used in confined space entry and industrial safety programs.
Containing 18.0% oxygen, this mixture simulates severe oxygen-deficient atmospheric conditions significantly below OSHA’s 19.5% threshold. It enables technicians to validate oxygen alarm activation under aggressive 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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18.0% Oxygen for deep oxygen-deficiency simulation
This blend is commonly specified for advanced confined space training programs, emergency response simulation exercises, and facilities operating with internal oxygen alarm thresholds below regulatory minimums.
The 34L disposable cylinder provides maximum portability for field technicians, service kits, and low-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) | 18.0% |
| 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 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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Severe oxygen-deficiency alarm verification
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Confined space emergency simulation
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Advanced safety training programs
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Routine bump testing
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Portable field calibration programs
The 34L format is ideal for technicians requiring lightweight, deployable calibration cylinders.
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.
