Product Description
4-Gas Calibration Gas – 25 PPM H2S / 50 PPM CO / 2.5% (50% LEL) CH4 / 17.0% O2 – 44L C-10 Cylinder
This 4-gas calibration gas blend is engineered for precision 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 replicates extreme oxygen-deficient conditions far below OSHA’s 19.5% safety threshold. It enables technicians to validate oxygen alarm activation under severe depletion scenarios while simultaneously confirming toxic and combustible sensor accuracy.
Concentration profile:
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25 PPM Hydrogen Sulfide for toxic exposure sensor validation
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50 PPM Carbon Monoxide for conservative CO alarm calibration
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2.5% Methane (50% LEL) for combustible sensor verification
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17.0% Oxygen for extreme oxygen-deficiency simulation
This blend is commonly specified for confined space rescue drills, emergency response training, and industrial programs requiring aggressive oxygen alarm validation.
The 44L cylinder provides a compact, field-ready format ideal for mobile safety teams and routine calibration schedules.
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 | 44L (1.5 ft³) |
| Pressure | 750 psi |
| Cylinder Specification | C-10 |
| Cylinder Material | Aluminum |
| Gas Reactivity | Reactive |
Reactive multi-gas blends require compatible C-10 regulators to maintain mixture stability and ensure calibration precision.
Applications & Detector Compatibility
Compatible with most major portable multi-gas monitors used for toxic, combustible, and oxygen detection, including BW, MSA, Industrial Scientific, RAE Systems, and Dräger.
Typical applications include:
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Extreme oxygen-deficiency alarm validation
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Confined space rescue simulation
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Emergency response training
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Multi-sensor bump testing programs
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Industrial hygiene compliance verification
The 44L size balances portability with sufficient calibration volume 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 tailored to your detector model, regulatory standards, or site-specific safety requirements.
