Product Description
221L CO (10 PPM), CH₄ (50% LEL), and O₂ Calibration Gas – High-Use Low-Level CO Calibration
This 221L custom calibration gas cylinder is designed for high-frequency calibration programs requiring accurate low-level carbon monoxide detection alongside standard combustible gas testing.
The mixture includes 10 PPM Carbon Monoxide (CO) for sensitive toxic gas calibration, 2.5% Methane (50% LEL) for standard LEL verification, and 20.9% Oxygen (O₂) to simulate normal atmospheric conditions.
This blend is ideal for facilities managing multiple gas detectors that require consistent low-range CO calibration with reliable combustible gas response testing.
Gas Concentrations
- Carbon Monoxide (CO): 10 PPM
- Methane (CH₄): 2.5% (50% LEL)
- Oxygen (O₂): 20.9%
- Balance Gas: Nitrogen (N₂)
Cylinder Specifications
- Cylinder Size: 221L
- Cylinder Material: Aluminum (update if steel)
- Valve Type: C-10 (update if CGA-165)
- Reactivity: Non-Reactive
Applications
- High-volume detector calibration programs
- Low-level CO sensor validation
- Routine 50% LEL bump testing
- Industrial hygiene monitoring
- Facility-wide safety compliance
Why This 221L Calibration Gas
- Extended runtime for high-use environments
- Supports low-level CO detection (10 PPM)
- Industry-standard 50% LEL methane testing
- Ideal for multi-detector facility operations
Request a Custom Calibration Gas Quote
Need a different CO level, gas mix, or cylinder configuration?
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 CO / CH₄ / O₂
Cylinder Material Steel
Cylinder Pressure 500 PSI
Gas Reactivity Non-Reactive
Carbon Monoxide (CO) Concentration 10 PPM
Methane (CH₄) Concentration 2.5% (50% LEL)
Oxygen (O₂) Concentration 20.9%
