Product Description
4-Gas Calibration Gas – 25 PPM H2S / 250 PPM CO / 2.5% (50% LEL) CH4 / 20.9% O2 – 66L C-10 Cylinder
This 4-gas calibration gas blend is engineered for high carbon monoxide alarm validation in industrial combustion and process safety environments.
With 250 PPM Carbon Monoxide, this mixture supports facilities operating with elevated CO alarm thresholds or testing worst-case exposure scenarios. The inclusion of 20.9% oxygen maintains atmospheric baseline conditions, ensuring accurate CO and H₂S sensor validation without oxygen-deficiency influence.
Concentration profile:
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25 PPM Hydrogen Sulfide for toxic gas sensor verification
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250 PPM Carbon Monoxide for high-threshold CO alarm calibration
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2.5% Methane (50% LEL) for combustible channel accuracy
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20.9% Oxygen to maintain atmospheric baseline reference
Commonly specified for:
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Boiler room and combustion system testing
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Engine exhaust exposure environments
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Manufacturing and heavy industry
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High PEL CO compliance programs
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Industrial process safety calibration
The 66L cylinder offers balanced capacity for repeated high-CO validation cycles while remaining portable for field and plant use.
Gas Concentrations
| Component | Concentration |
|---|---|
| Hydrogen Sulfide (H₂S) | 25 PPM |
| Carbon Monoxide (CO) | 250 PPM |
| Methane (CH₄) | 2.5% (50% LEL) |
| Oxygen (O₂) | 20.9% |
| Balance | Nitrogen |
Cylinder Specifications
| Property | Value |
|---|---|
| Cylinder Size | 66L (2.3 ft³) |
| Pressure | 1150 psi |
| Cylinder Specification | C-10 |
| Cylinder Material | Aluminum |
| Gas Reactivity | Reactive |
Reactive multi-gas blends require compatible C-10 regulators to maintain mixture integrity and ensure precise calibration performance.
Applications & Detector Compatibility
Compatible with leading portable and fixed multi-gas detection platforms from BW, MSA, Industrial Scientific, RAE Systems, and Dräger.
Ideal for:
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High CO alarm validation
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Combustion safety programs
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Industrial plant calibration
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Multi-sensor bump testing
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Process safety compliance audits
The 66L format supports repeatable high-CO calibration programs in industrial and energy-sector 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 tailored to your detector model, regulatory requirements, or site-specific hazard profile.
