Product Description
H2S 25 ppm / CO 200 ppm / CH4 2.5% (50% LEL) / O2 17.0% Calibration Gas – 44 Liter Cylinder
This 4-gas calibration blend contains:
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Hydrogen Sulfide (H2S) – 25 ppm
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Carbon Monoxide (CO) – 200 ppm
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Methane (CH4) – 2.5% (50% LEL)
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Oxygen (O2) – 17.0%
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Balance Gas – Nitrogen
Packaged in a 44 Liter aluminum cylinder at 750 PSI with a C-10 valve, this reactive multi-gas mixture is designed for calibration, bump testing, and maintenance of portable and fixed multi-gas detectors used in confined space entry and industrial safety programs.
Cylinder Specifications
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Cylinder Volume: 44 Liters (1.5 Cubic Feet)
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Pressure: 750 PSI
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Valve Type: C-10
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Cylinder Material: Aluminum
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Gas Reactivity: Reactive mixture
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Balance Gas: Nitrogen
Applications & Detector Compatibility
This 4-gas calibration gas is commonly used for:
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Confined space entry compliance testing
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OSHA-required bump testing
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Industrial plant maintenance
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Wastewater treatment facilities
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Oil & gas safety programs
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Fire department and hazmat monitoring
Compatible with most major 4-gas monitors measuring H2S, CO, CH4 (LEL), and O2.
The 2.5% methane concentration represents 50% of LEL, providing accurate lower explosive limit sensor verification.
Why Buyers Choose This Blend
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High CO concentration (200 ppm) for broader sensor verification range
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17.0% oxygen for realistic oxygen-deficient simulation
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Balanced nitrogen carrier for mixture stability
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44L size ideal for service teams and mobile compliance kits
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C-10 valve compatibility with standard fixed-flow regulators
Designed for routine calibration schedules and field service rotation programs.
Need a Different Blend or Cylinder Size?
We produce calibration gases for a wide range of detector configurations.
If your required concentration or cylinder size is not listed, request a custom quote for rapid production.
