Product Description
221L 4 Gas Calibration Gas – 40% LEL Methane, CO, O₂ (Extended Runtime Cylinder)
This 221L 4 gas calibration gas is designed for extended-duration multi-gas detector calibration, featuring 50 PPM Carbon Monoxide (CO), 2.0% Methane (40% LEL), and 20.9% Oxygen (O₂) balanced in nitrogen.
With a low-pressure CGA-165 configuration, this cylinder is ideal for controlled, continuous calibration workflows, allowing teams to perform repeated or long-duration calibration without frequent cylinder replacement.
Gas Composition
- Carbon Monoxide (CO): 50 PPM (Standard Level)
- Methane (CH₄): 2.0% (40% LEL)
- Oxygen (O₂): 20.9% (Atmospheric Baseline)
- Balance Gas: Nitrogen (N₂)
Cylinder Specifications
- Cylinder Size: 221L
- Pressure: 250 PSI
- Valve: CGA-165
- Material: Steel
- Type: Disposable
- Reactivity: Non-Reactive
Applications
- Extended calibration programs
- Multi-day detector validation
- Continuous gas delivery setups
- Industrial safety system testing
- Facility-level calibration workflows
Why This 221L 40% LEL Cylinder is Important
- Supports long-duration calibration cycles
- Reduces frequency of cylinder changes
- Provides controlled, low-pressure delivery
- Ideal for continuous or repeated testing environments
- Bridges the gap between field cylinders and bulk systems
221L vs Other 40% LEL Options
- 34L → portable precision
- 60–120L → field
- 221L (this SKU) → extended runtime
- 680L → facility-scale
40% vs 50% LEL Calibration
- 50% LEL (2.5% CH₄) → standard calibration
- 40% LEL (this SKU) → controlled, lower-range validation
Valve Type Context
- CGA-600 → portable regulated
- C-10 → standard field systems
- CGA-165 (this SKU) → low-pressure, extended flow systems
Other Details
Warranty 48 monthsProduct 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 2.0% (40% LEL)
Oxygen (O2) Concentration 20.9%
