Methane (CH₄) 2.5% (50% LEL) + Oxygen (O₂) 19.0% Calibration Gas – Nitrogen Balance

Specifications and cylinder appearance may vary by cylinder size and production lot.

Common Uses: Calibration and bump testing of compatible methane, combustible gas, and oxygen detection instruments requiring a 2.5% Methane (50% LEL) mixture with 19.0% Oxygen and nitrogen balance.

Always verify the required calibration gas concentrations, LEL reference, balance gas, cylinder connection, regulator, flow rate, and instrument response requirements, and follow the instrument manufacturer's calibration and bump-test procedures before use.

Hazardous Material Shipping

Calibration gas cylinders are regulated for transportation as hazardous materials and must be shipped in accordance with applicable carrier and hazardous-material regulations. Available shipping methods and charges may vary based on cylinder size, quantity, destination, and applicable HazMat requirements.

Lead Time

Please allow approximately 3 business days for order processing prior to shipment. Lead times may vary depending on availability and order quantity.

Non-Returnable Product

Calibration gas is non-returnable. Because calibration gas is a certified gas mixture with a limited shelf life, cylinders cannot be returned or exchanged after shipment.

Please verify the gas concentrations, LEL value, balance gas, cylinder size, and connection before placing your order.

Important Regulator Compatibility: The cylinder connections differ by size. The 34L cylinder uses a CGA-600 connection, while the 103L cylinder uses a C-10 connection. Verify that your regulator matches the cylinder connection selected before ordering.

Not sure which cylinder or regulator you need?
Contact CPS Calibrations before ordering at 865-900-8844 or info@cpscalibrations.com. We can help verify compatibility with your gas detection instrument.