Product Description
44L 750 PSI 4-Gas Calibration Gas – 18.0% Oxygen Blend
This 4-gas calibration cylinder is designed for technicians who require reliable oxygen-deficiency alarm verification in a manageable, field-friendly size.
Gas Blend Details
Hydrogen Sulfide (H₂S) – 25 PPM
Carbon Monoxide (CO) – 100 PPM
Methane (CH₄) – 2.5% (50% LEL)
Oxygen (O₂) – 18.0%
Balance Gas – Nitrogen
The 18.0% oxygen level provides a controlled deficiency atmosphere for validating alarm thresholds below OSHA’s 19.5% requirement.
Cylinder Specifications
Cylinder Capacity: 44L (1.5 Cubic Feet)
Fill Pressure: 750 PSI
Valve: C-10
Material: Aluminum
Reactivity: Reactive
The 750 PSI configuration offers balanced portability and calibration volume, making it suitable for recurring field bump tests without the size of high-volume cylinders.
Application Focus
This blend supports:
• Portable multi-gas monitor calibration
• Confined space entry compliance
• Oxygen-deficiency alarm verification
• Routine industrial hygiene inspections
• Combustible and toxic sensor validation
Methane at 2.5% represents 50% LEL for controlled combustible sensor testing.
CO at 100 PPM supports standard low-alarm calibration settings.
Oxygen Tier Context
Compared to other oxygen levels:
20.9% → Ambient baseline
19.0% → Mild deficiency simulation
18.5% → OSHA threshold validation
18.0% → Enhanced deficiency validation
17.0% → Aggressive deficiency simulation
This 18.0% option is frequently selected when tighter alarm performance verification is required.
