Product Description
4-Gas Calibration Gas – H₂S 15 PPM / CO 250 PPM / CH₄ 2.5% (50% LEL) / O₂ 20.9%
This 66L reactive 4-gas calibration mixture is designed for accurate bump testing and calibration of portable and fixed multi-gas detectors used in confined space entry, industrial hygiene, oil & gas, utilities, and safety compliance applications.
The mixture contains:
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Hydrogen Sulfide (H₂S): 15 PPM
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Carbon Monoxide (CO): 250 PPM
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Methane (CH₄): 2.5% (50% LEL)
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Oxygen (O₂): 20.9%
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Balance: Nitrogen
Packaged in a 66L aluminum cylinder pressurized to 1150 PSI with a C-10 valve configuration.
Gas Composition & Cylinder Details
Gas Mixture:
H₂S 15 PPM / CO 250 PPM / CH₄ 2.5% (50% LEL) / O₂ 20.9% / Nitrogen BAL
Cylinder Size: 66L
Cylinder Pressure: 1150 PSI
Cylinder Material: Aluminum
Valve Type: C-10
Gas Reactivity: Reactive
This blend supports proper sensor response verification for electrochemical (H₂S, CO), catalytic bead (LEL methane), and oxygen sensors.
Applications & Compatibility
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Confined space entry compliance
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Oil & gas operations
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Industrial maintenance
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Wastewater facilities
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Manufacturing plants
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Safety audits & compliance testing
Compatible with most major multi-gas detectors configured for standard 4-gas monitoring.
Why Buyers Choose This Blend
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Field-ready multi-gas mixture for routine calibration
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Balanced concentration profile for standard compliance testing
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66L mid-size cylinder for service teams and safety programs
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Reactive gas formulation handled to maintain stability
If your required concentration, balance gas, or cylinder size differs from this configuration, custom calibration gas blends are available upon request.
