Product Description
H₂S 25 PPM / CO 100 PPM / CH₄ 2.5% (50% LEL) / O₂ 20.9% 4-Gas Calibration Gas – 120L 1050 PSI
This 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) – 20.9%
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Balance Gas – Nitrogen
Engineered for calibration and bump testing of portable and fixed multi-gas monitors operating under normal atmospheric oxygen conditions.
Gas Composition
H₂S 25 PPM / CO 100 PPM / CH₄ 2.5% (50% LEL) / O₂ 20.9%
Balance: Nitrogen
Gas Count: 4
Cylinder Specifications
Cylinder Size: 120L (4.2 Cubic Feet)
Cylinder Pressure: 1050 PSI
Valve Type: C-10
Cylinder Material: Aluminum
Gas Reactivity: Reactive
The 120L 1050 PSI format provides extended calibration cycles and reduced cylinder replacement frequency for high-usage safety programs.
Application Positioning
This blend is ideal for:
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Large confined space compliance programs
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Centralized calibration stations
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Multi-detector fleet maintenance
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Utilities, energy, and municipal operations
Oxygen at 20.9% simulates ambient air conditions rather than oxygen-deficiency testing.
Methane at 2.5% equals 50% LEL for combustible sensor verification.
CO at 100 PPM aligns with common low-alarm calibration setpoints.
Why Choose 120L 1050 PSI?
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Maximum calibration volume
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Reduced downtime for safety teams
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Lower cost per bump test over time
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Ideal for fixed calibration stations
Need Alternate Concentrations or Pressure Ratings?
We manufacture this blend in multiple cylinder sizes and pressure configurations. Contact us for custom calibration gas specifications.
