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  • 221 Liter-Carbon Monoxide 50 ppm/ Methane 2.5% (50% LEL)/ Oxygen 12.0%/ Nitrogen

    • Carbon Monoxide (CO) 50 PPM / Methane (CH₄) 2.5% (50% LEL) / Oxygen (O₂) 12.0% / Nitrogen BAL Calibration Gas – 221L 250 PSI CGA-165 Steel Disposable (Non-Reactive)

    E-Gas Depot

    $145.00
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    SKU:
    39-3000-221L
    Availability:
    3-5 Business Days + shipping time
    Weight:
    100.80 Ounces
    Width:
    9.00 (in)
    Height:
    16.25 (in)
    Depth:
    9.00 (in)
    Size:
    221L
    Gas Composition:
    CO / CH4 / O2
    Cylinder Material:
    Steel
    Cylinder Pressure:
    250 PSI
    Gas Reactivity:
    Non-Reactive
    Carbon Monoxide (CO) Concentration:
    50 PPM
    Methane (CH₄) Concentration:
    2.5% (50% LEL)
    Oxygen (O2) Concentration:
    12.0%
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    Product Description

    221L 4 Gas Calibration Gas – 12.0% O₂ Extreme Deficiency (Extended-Use Cylinder)

    This 221L 4 gas calibration gas is engineered for extended-duration extreme oxygen-deficiency simulation, featuring 12.0% Oxygen (O₂) alongside Carbon Monoxide (CO) and Methane (CH₄) balanced in nitrogen.

    With significantly more capacity than portable cylinders, this unit supports multiple calibration cycles and continuous hazard-level testing, making it ideal for field teams working in high-risk, oxygen-depleted environments.

    Gas Composition

    • Carbon Monoxide (CO): 50 PPM
    • Methane (CH₄): 2.5% (50% LEL)
    • Oxygen (O₂): 12.0% (Extreme Deficiency Level)
    • Balance Gas: Nitrogen (N₂)

    Cylinder Specifications

    • Cylinder Size: 221L
    • Pressure: 250 PSI
    • Valve: CGA-165
    • Material: Steel
    • Type: Disposable
    • Reactivity: Non-Reactive

    Applications

    • Multi-day extreme oxygen deficiency testing
    • Emergency response validation
    • Confined space worst-case simulation
    • High-frequency bump testing programs
    • Industrial safety compliance

    Why This 221L 12% O₂ Cylinder is Critical

    • Simulates severely oxygen-depleted environments at scale
    • Enables continuous, high-frequency testing
    • Reduces cylinder changeouts during operations
    • Eliminates need for refillable cylinder systems
    • Compatible with CGA-165 regulator setups

    221L vs Other Extreme O₂ Options

    • 34L → portable daily testing
    • 60–120L → field deployment
    • 221L (this SKU) → extended multi-day operations
    • 680L → facility-scale systems

    Oxygen Calibration Severity Scale

    • 20.9% O₂ → baseline
    • 19.0% O₂ → early deficiency
    • 18.0% O₂ → critical threshold
    • 17.0% O₂ → severe deficiency
    • 12.0% O₂ (this SKU) → extreme / emergency-level validation

    Need Bulk or Custom Extreme Gas Programs?

    We provide calibration gases across all oxygen levels and cylinder sizes. Contact us for tailored supply solutions.

    Other Details

    Warranty 48 months

    Product Videos

    Custom Field

    Size 221L
    Gas Composition CO / CH4 / O2
    Cylinder Material Steel
    Cylinder Pressure 250 PSI
    Gas Reactivity Non-Reactive
    Carbon Monoxide (CO) Concentration 50 PPM
    Methane (CH₄) Concentration 2.5% (50% LEL)
    Oxygen (O2) Concentration 12.0%

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