Product Description
221L CO₂ (25%), CH₄ (50% LEL), and O₂ Calibration Gas – Durable High-Range IR & LEL Testing
This 221L custom calibration gas cylinder is designed for high-frequency facility calibration programs requiring elevated CO₂ concentration accuracy and reliable combustible gas verification.
The mixture includes 25.0% Carbon Dioxide (CO₂) for high-range IR (NDIR) sensor calibration, 2.5% Methane (50% LEL) for standard combustible gas testing, and 20.9% Oxygen (O₂) to simulate normal atmospheric conditions.
This blend is ideal for facilities managing multiple gas detectors that require consistent calibration across CO₂, methane, and oxygen sensors in demanding environments.
Gas Concentrations
- Carbon Dioxide (CO₂): 25.0%
- Methane (CH₄): 2.5% (50% LEL)
- Oxygen (O₂): 20.9%
- Balance Gas: Nitrogen (N₂)
Cylinder Specifications
- Cylinder Size: 221L
- Pressure: 250 PSI
- Cylinder Material: Steel
- Valve Type: CGA-165
- Reactivity: Non-Reactive
Applications
- High-volume IR (NDIR) CO₂ calibration
- Standard 50% LEL methane testing
- Multi-device calibration programs
- Industrial hygiene monitoring
- Facility safety compliance
Why This CO₂ / Methane Calibration Gas
- Durable steel cylinder for demanding environments
- Supports high-range CO₂ calibration (25%)
- Industry-standard 50% LEL methane testing
- Simulates normal atmospheric oxygen (20.9%)
Request a Custom Calibration Gas Quote
Need a different CO₂ %, gas mix, or cylinder size?
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 25.0%
Oxygen (O2) Concentration 20.9%
