Product Description
221L CO₂ (3%), CH₄ (50% LEL), and O₂ (18%) Calibration Gas – High-Use Confined Space Calibration
This 221L custom calibration gas cylinder is designed for high-frequency calibration programs requiring low-range CO₂ accuracy, combustible gas verification, and mild oxygen-deficiency simulation.
The mixture includes 3.0% Carbon Dioxide (CO₂) for IR (NDIR) sensor calibration, 2.5% Methane (CH₄) (50% LEL) for standard combustible gas testing, and 18.0% Oxygen (O₂) to simulate mildly reduced oxygen environments.
This blend is ideal for confined space monitoring, industrial safety compliance, and multi-gas detector calibration across large operational environments.
Gas Concentrations
- Carbon Dioxide (CO₂): 3.0%
- Methane (CH₄): 2.5% (50% LEL)
- Oxygen (O₂): 18.0%
- Balance Gas: Nitrogen (N₂)
Cylinder Specifications
- Cylinder Size: 221L
- Pressure: 250 PSI
- Cylinder Material: Steel
- Valve Type: CGA-165
- Reactivity: Non-Reactive
Applications
- IR (NDIR) CO₂ calibration
- Standard 50% LEL methane testing
- Mild oxygen-deficiency simulation (18% O₂)
- Confined space detector calibration
- Industrial hygiene monitoring
Why This CO₂ / Methane Calibration Gas
- Durable steel cylinder for demanding environments
- Simulates mildly oxygen-deficient environments (18%)
- Supports low-range CO₂ calibration (3%)
- Industry-standard 50% LEL methane testing
Request a Custom Calibration Gas Quote
Need a different CO₂ %, oxygen level, or gas mix? Contact us for a fast custom calibration gas quote tailored to your application.
Other Details
Warranty 48 monthsProduct Videos
Custom Field
Size 221L
Gas Composition CO2, CH4, O2
Cylinder Material Steel
Gas Reactivity Non-Reactive
Cylinder Pressure 250 PSI
Carbon Dioxide (CO2) Concentration 3.0%
Methane (CH4) Concentration 2.5% (50% LEL)
Oxygen (O2) Concentration 18.0%
