Product Description
H₂S 25 PPM / CO 100 PPM / CH₄ 2.5% (50% LEL) / O₂ 18.5% 4-Gas Calibration Gas – 34L 500 PSI Custom Mix
This custom 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) – 18.5%
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Balance Gas – Nitrogen
Designed for precise oxygen-deficiency alarm validation in confined space and regulated industrial environments.
Gas Composition
H₂S 25 PPM / CO 100 PPM / CH₄ 2.5% (50% LEL) / O₂ 18.5%
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
Blend Type: Custom Mix
The 34L 500 PSI configuration is ideal for mobile compliance kits and lower-volume calibration programs requiring regulatory deficiency simulation.
Compliance Positioning
This 18.5% oxygen formulation is engineered to:
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Trigger oxygen-deficiency alarms below OSHA’s 19.5% threshold
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Simulate regulated confined space deficiency conditions
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Validate low-oxygen sensor response accuracy
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Support industrial hygiene and safety compliance programs
Unlike 20.9% (ambient) or 19.0% blends, 18.5% oxygen represents a clear regulatory deficiency atmosphere for alarm verification.
Methane at 2.5% equals 50% LEL for combustible sensor validation.
CO at 100 PPM aligns with common low-alarm calibration setpoints.
Why Choose 34L 500 PSI Custom?
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Compact and lightweight for field technicians
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Lower upfront cost for smaller safety programs
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Disposable cylinder convenience
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Custom blend for precise regulatory threshold validation
Lead times may apply due to custom blending requirements.
