Product Description
H₂S 25 PPM / CO 100 PPM / CH₄ 2.5% (50% LEL) / O₂ 19.0% 4-Gas Calibration Gas – 60L 1000 PSI
This 4-gas calibration blend contains:
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Hydrogen Sulfide (H₂S) – 25 PPM
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Carbon Monoxide (CO) – 100 PPM
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Methane (CH₄) – 2.5% (50% LEL)
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Oxygen (O₂) – 19.0%
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Balance Gas – Nitrogen
Formulated for calibration and bump testing of portable and fixed multi-gas monitors requiring oxygen-deficiency alarm verification.
Gas Composition
H₂S 25 PPM / CO 100 PPM / CH₄ 2.5% (50% LEL) / O₂ 19.0%
Balance: Nitrogen
Gas Count: 4
Cylinder Specifications
Cylinder Size: 60L (2.1 Cubic Feet)
Cylinder Pressure: 1000 PSI
Valve Type: C-10
Cylinder Material: Aluminum
Gas Reactivity: Reactive
The 60L 1000 PSI configuration provides strong calibration capacity while remaining manageable for field use.
Application Positioning
Unlike 20.9% oxygen blends that simulate normal atmospheric air, this 19.0% oxygen formulation is designed to:
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Verify oxygen-deficiency alarm thresholds
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Simulate low-oxygen confined space conditions
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Support OSHA-required compliance testing
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Validate low-alarm sensor performance
Methane at 2.5% equals 50% LEL for combustible sensor verification.
CO at 100 PPM aligns with common alarm calibration setpoints.
Ideal For
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Confined space programs requiring deficiency simulation
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Utilities and municipal safety teams
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Industrial maintenance departments
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Centralized detector calibration stations
Need Alternate Oxygen Levels or CO Concentrations?
This blend is available in 17.0%, 19.0%, and 20.9% oxygen configurations and multiple cylinder sizes. Contact us for custom calibration gas specifications.
