Product Description
H₂S 25 PPM / CO 100 PPM / CH₄ 2.5% (50% LEL) / O₂ 19.0% 4-Gas Calibration Gas – 66L 1150 PSI
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
Engineered for calibration and bump testing of portable and fixed multi-gas monitors 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: 66L (2.3 Cubic Feet)
Cylinder Pressure: 1150 PSI
Valve Type: C-10
Cylinder Material: Aluminum
Gas Reactivity: Reactive
The 66L 1150 PSI configuration provides strong capacity for recurring compliance programs and centralized calibration stations.
Application Positioning
Unlike 20.9% oxygen blends that simulate ambient air, this 19.0% oxygen mixture is formulated to:
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Trigger oxygen-deficiency alarm verification
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Test low-oxygen sensor setpoints
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Support confined space entry compliance programs
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Validate alarm thresholds below normal atmospheric levels
Methane at 2.5% equals 50% LEL for combustible sensor verification.
CO at 100 PPM aligns with common low-alarm testing thresholds.
Ideal For
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Confined space safety programs
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Industrial maintenance teams
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Utilities and wastewater facilities
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Safety managers requiring alarm-level verification
Need Alternate Oxygen Levels?
This blend is available in 17.0%, 19.0%, and 20.9% oxygen configurations depending on your compliance testing requirements. Contact us for custom concentrations or alternate cylinder sizes.
