Product Description
H₂S 25 PPM / CO 200 PPM / CH₄ 2.5% (50% LEL) / O₂ 17.0% 4-Gas Calibration Gas – 34L Cylinder
This 4-gas calibration mixture contains:
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Hydrogen Sulfide (H₂S) – 25 PPM
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Carbon Monoxide (CO) – 200 PPM
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Methane (CH₄) – 2.5% (50% LEL)
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Oxygen (O₂) – 17.0%
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Balance Gas – Nitrogen
Engineered for portable multi-gas monitor calibration and bump testing in confined space and industrial safety environments.
Gas Composition
H₂S 25 PPM / CO 200 PPM / CH₄ 2.5% (50% LEL) / O₂ 17.0%
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
This lower-pressure 34L format is ideal for mobile technicians, smaller safety programs, and lighter-weight compliance kits.
Applications & Use Cases
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Confined space entry compliance
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OSHA bump testing programs
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Wastewater & utility safety checks
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Industrial maintenance verification
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Portable 4-gas detector calibration
The 2.5% methane concentration represents 50% LEL, ensuring accurate LEL sensor verification.
The 17.0% oxygen level supports oxygen-deficiency alarm testing.
Need a Different Cylinder Size or Blend?
We produce calibration gases for a wide range of gas detection systems.
If your required concentration or cylinder size is not listed, request a custom quote.
