Product Description
4-Gas Calibration Gas – 25 PPM H2S / 200 PPM CO / 2.5% (50% LEL) CH4 / 20.0% O2 – 120L C-10 Cylinder
This 4-gas calibration gas blend is engineered for enterprise-scale industrial safety programs requiring sustained elevated carbon monoxide validation and controlled oxygen baseline deviation testing.
The 200 PPM Carbon Monoxide concentration supports facilities operating with moderate high CO alarm thresholds, while 20.0% oxygen provides controlled atmospheric variance to verify oxygen sensor response stability without simulating deficiency conditions.
Concentration profile:
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25 PPM Hydrogen Sulfide for toxic sensor verification
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200 PPM Carbon Monoxide for elevated CO calibration
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2.5% Methane (50% LEL) for combustible channel accuracy
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20.0% Oxygen for oxygen baseline deviation validation
Commonly deployed in:
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Large manufacturing facilities
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Refinery and petrochemical operations
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Combustion-intensive industrial sites
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Centralized calibration stations
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High-frequency detector fleet programs
The 120L cylinder reduces replacement frequency and supports structured enterprise-level calibration schedules.
Gas Concentrations
| Component | Concentration |
|---|---|
| Hydrogen Sulfide (H₂S) | 25 PPM |
| Carbon Monoxide (CO) | 200 PPM |
| Methane (CH₄) | 2.5% (50% LEL) |
| Oxygen (O₂) | 20.0% |
| Balance | Nitrogen |
Cylinder Specifications
| Property | Value |
|---|---|
| Cylinder Size | 120L (4.2 ft³) |
| Pressure | 1050 psi |
| Cylinder Specification | C-10 |
| Cylinder Material | Aluminum |
| Gas Reactivity | Reactive |
Reactive multi-gas blends require compatible C-10 regulators to preserve mixture integrity and ensure consistent calibration output.
Applications & Detector Compatibility
Compatible with major portable and fixed multi-gas detection systems from BW, MSA, Industrial Scientific, RAE Systems, and Dräger.
Ideal for:
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Elevated CO alarm threshold validation
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Oxygen sensor baseline verification
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Enterprise bump testing programs
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Multi-detector fleet maintenance
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Industrial compliance audits
The 120L format is designed for high-throughput calibration environments where reliability and reduced downtime are critical.
Need a Different Concentration or Cylinder Size?
If you require a different ppm level, oxygen percentage, LEL concentration, or cylinder volume, our calibration gas specialists can supply custom 4-gas blends matched to your detector platform and regulatory specifications
