Product Description
H₂S 25 PPM / CO 100 PPM / CH₄ 2.5% (50% LEL) / O₂ 18.5% 4-Gas Calibration Gas – 60L 1000 PSI Custom Mix
This custom 4-gas calibration mixture 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
Engineered for calibration and bump testing of multi-gas detectors requiring regulated oxygen-deficiency alarm verification.
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: 60L (2.1 Cubic Feet)
Cylinder Pressure: 1000 PSI
Valve Type: C-10
Cylinder Material: Aluminum
Gas Reactivity: Reactive
Blend Type: Custom Mix
Compliance Positioning
This 18.5% oxygen formulation is specifically designed to:
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Trigger oxygen-deficiency alarm thresholds below OSHA’s 19.5% standard
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Simulate regulated confined space deficiency conditions
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Validate low-oxygen sensor calibration accuracy
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Support industrial hygiene and compliance programs
Unlike 20.9% (ambient) or 19.0% blends, 18.5% oxygen represents a true deficiency atmosphere for alarm verification.
Methane at 2.5% equals 50% LEL for combustible sensor testing.
CO at 100 PPM aligns with common alarm calibration setpoints.
Why Choose 60L 1000 PSI Custom?
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Strong calibration capacity in a manageable cylinder size
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Suitable for mobile or centralized compliance programs
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Custom concentration for precise regulatory threshold validation
Lead times may apply due to custom blending requirements.
