Product Description
H₂S 25 PPM / CO 100 PPM / CH₄ 2.5% (50% LEL) / O₂ 18.5% 4-Gas Calibration Gas – 44L 750 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
Designed for calibration and bump testing of portable and fixed 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: 44L (1.5 Cubic Feet)
Cylinder Pressure: 750 PSI
Valve Type: C-10
Cylinder Material: Aluminum
Gas Reactivity: Reactive
Blend Type: Custom Mix
The 44L 750 PSI configuration offers a balanced capacity-to-weight ratio for field technicians and recurring compliance programs.
Compliance Positioning
This 18.5% oxygen formulation is engineered to:
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Trigger oxygen-deficiency alarms below OSHA’s 19.5% standard
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Simulate regulated confined space deficiency conditions
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Validate low-oxygen sensor 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 true 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 44L 750 PSI Custom?
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Manageable cylinder size for mobile safety teams
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Lower volume than 60L/66L options
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Custom blend for precise regulatory threshold validation
Lead times may vary due to custom blending requirements.
