The 50% LEL Pentane Equivalent, 50 PPM Carbon Monoxide, 25 PPM Hydrogen Sulfide, and 18% Oxygen Calibration Gas Mixture is designed for the calibration, bump testing, and verification of compatible multi-gas detection and monitoring instruments.

This four-component calibration gas provides a 50% LEL Pentane Equivalent combustible gas concentration along with known concentrations of carbon monoxide (CO), hydrogen sulfide (H₂S), and oxygen (O₂), balanced with nitrogen. This quad-mix is suitable for compatible multi-gas detectors equipped with combustible gas, carbon monoxide, hydrogen sulfide, and oxygen sensors.

Calibration Gas Mixture

• Combustible Gas (LEL): 50% LEL Pentane Equivalent

• Carbon Monoxide (CO): 50 PPM

• Hydrogen Sulfide (H₂S): 25 PPM

• Oxygen (O₂): 18%

• Balance Gas: Nitrogen (N₂)

• Gas Type: Reactive Gas

• Cylinder Material: Aluminum Alloy

• Valve Inlet: 5/8"-18 UNF (C-10)

• Regulator: 71-Series

Common Applications

This LEL/O₂/CO/H₂S four-gas calibration mixture is suitable for compatible equipment used in multi-gas detector calibration, bump testing, combustible gas and LEL detection, carbon monoxide detection, hydrogen sulfide detection, oxygen monitoring, confined space monitoring, industrial hygiene, environmental monitoring, occupational safety, and workplace gas detection applications.

Always verify the required gas concentrations, LEL reference gas, 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 multi-gas calibration mixtures, LEL/O₂/CO/H₂S calibration gas, calibration gas cylinders, fixed flow regulators, gas detector accessories, detector tubes, and gas detection equipment.