The 2.5% Methane (50% LEL), 50 PPM Carbon Monoxide, and 19% Oxygen Calibration Gas Mixture is designed for the calibration, bump testing, and verification of compatible multi-gas detection and monitoring instruments.

This three-component calibration gas provides known concentrations of methane (CH₄), carbon monoxide (CO), and oxygen (O₂), balanced with nitrogen. This multi-gas mixture is suitable for compatible gas detectors equipped with combustible gas, carbon monoxide, and oxygen sensors.

Calibration Gas Mixture

• Methane (CH₄): 2.5% by volume (50% LEL)

• Carbon Monoxide (CO): 50 PPM

• Oxygen (O₂): 19%

• Balance Gas: Nitrogen (N₂)

• Gas Type: Non-Reactive Gas Only

Common Applications

This CH₄ (LEL)/CO/O₂ calibration gas mixture is suitable for compatible equipment used in multi-gas detector calibration, bump testing, combustible gas and LEL detection, carbon monoxide detection, oxygen monitoring, confined space monitoring, industrial hygiene, environmental monitoring, occupational safety, and workplace gas detection applications.

Always verify the required gas concentrations, cylinder connection, flow rate, and regulator compatibility for your specific gas detection instrument before use.

Cylinder Material Notice

Steel cylinders are for non-reactive calibration gases only. Aluminum cylinders are for reactive calibration gases only, regardless of cylinder size. Please verify the gas type and cylinder material when selecting your calibration gas.

Tip: Check the Specifications tab for a visual chart of available cylinder sizes, materials, pressures, dimensions, valve inlets, and regulator compatibility.

Choose Instrument Depot for dependable CH₄/CO/O₂ calibration gas mixtures, multi-gas calibration gas, calibration gas cylinders, fixed flow regulators, gas detector accessories, detector tubes, and gas detection equipment.