Product Description
H₂S 25 PPM / CO 100 PPM / CH₄ 2.5% (50% LEL) / O₂ 19.0% 4-Gas Calibration Gas – 34L Disposable Cylinder
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 multi-gas detectors 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: 34L (1.2 Cubic Feet)
Cylinder Pressure: 500 PSI
Valve Type: C-10
Cylinder Material: Aluminum
Gas Reactivity: Reactive
Cylinder Type: Disposable
The 34L 500 PSI configuration is ideal for:
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Portable compliance kits
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Smaller confined space programs
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Low-volume bump testing schedules
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Field technicians requiring lightweight cylinders
Application Positioning
Unlike 20.9% oxygen blends that simulate ambient air, this 19.0% oxygen mixture is designed to:
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Trigger oxygen-deficiency alarm thresholds
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Simulate mild low-oxygen confined space conditions
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Support OSHA compliance programs
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Validate low-oxygen sensor performance
Methane at 2.5% equals 50% LEL for combustible sensor verification.
CO at 100 PPM aligns with common low-alarm calibration setpoints.
Why Choose 34L 500 PSI?
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Compact and easy to transport
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Lower upfront cost
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Suitable for rotating compliance schedules
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Compatible with standard C-10 fixed-flow regulators
Need Larger Volume or Alternate Oxygen Levels?
This blend is available in 44L, 60L, 66L, 116L, and 120L configurations and in 17.0%, 19.0%, or 20.9% oxygen levels. Contact us for custom calibration gas specifications.
