Product Description
H₂S 25 PPM / CO 100 PPM / CH₄ 2.5% (50% LEL) / O₂ 18.5% 4-Gas Calibration Gas – 66L 1150 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
Formulated for precise oxygen-deficiency alarm verification 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: 66L (2.3 Cubic Feet)
Cylinder Pressure: 1150 PSI
Valve Type: C-10
Cylinder Material: Aluminum
Gas Reactivity: Reactive
Blend Type: Custom Mix
Compliance Positioning
This 18.5% oxygen formulation is specifically suited for:
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OSHA oxygen-deficiency alarm testing
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Confined space compliance verification
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Sensor threshold validation below 19.5%
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Industrial hygiene programs requiring regulated deficiency simulation
Unlike 20.9% (ambient) or 19.0% blends, 18.5% oxygen represents a clear regulatory deficiency condition for alarm validation.
Methane at 2.5% equals 50% LEL for combustible sensor testing.
CO at 100 PPM aligns with standard alarm setpoints.
Why Custom Mix?
This 18.5% oxygen blend is produced as a custom mixture for programs requiring exact deficiency thresholds not stocked as standard inventory.
Lead times may vary. Contact us for scheduling and compliance program planning.
