Product Description
4-Gas Calibration Gas – 25 PPM H2S / 50 PPM CO / 50% LEL CH4 / 19.0% 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 19.0% oxygen, this blend simulates reduced-atmosphere conditions below the OSHA 19.5% oxygen-deficiency threshold. It enables 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 thresholds
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2.5% Methane (50% LEL) for combustible sensor accuracy
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19.0% Oxygen to simulate reduced-oxygen environments
This blend is commonly specified for advanced confined space training programs, industrial hygiene audits, and safety teams requiring deeper oxygen alarm testing.
The 34L disposable cylinder provides maximum portability for field technicians and mobile calibration kits.
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 | 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 accuracy.
Applications & Detector Compatibility
Compatible with most major portable multi-gas monitors used for toxic, combustible, and oxygen detection, including equipment 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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Routine bump testing
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Portable field calibration programs
The 34L format is ideal for low-volume or mobile calibration environments.
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.
