Product Description
H₂S 25 PPM / CO 100 PPM / CH₄ 2.5% (50% LEL) / O₂ 18.5% 4-Gas Calibration Gas – 120L 1050 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
Engineered for calibration and bump testing of portable and fixed multi-gas detectors requiring regulated oxygen-deficiency alarm validation.
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: 120L (4.2 Cubic Feet)
Cylinder Pressure: 1050 PSI
Valve Type: C-10
Cylinder Material: Aluminum
Gas Reactivity: Reactive
Blend Type: Custom Mix
The 120L 1050 PSI configuration provides maximum calibration volume for centralized compliance programs and high-usage detector fleets.
Compliance Positioning
This 18.5% oxygen formulation is specifically designed 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 calibration 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-level 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 120L 1050 PSI Custom?
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Maximum total calibration cycles
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Reduced cylinder replacement frequency
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Lower cost per bump test at scale
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Ideal for facility-wide safety programs
Custom blends may require lead time. Contact us to coordinate production and delivery schedules.
