Product Description
4-Gas Calibration Gas – 25 PPM H2S / 50 PPM CO / 2.5% (50% LEL) CH4 / 17.0% O2 – 120L C-10 Cylinder
This 4-gas calibration gas blend is engineered for precision bump testing and full calibration of portable multi-gas monitors used in confined space entry and industrial safety programs.
Containing 17.0% oxygen, this mixture replicates extreme oxygen-deficient atmospheric conditions far below OSHA’s 19.5% safety threshold. It allows safety professionals to validate oxygen alarm activation under severe depletion scenarios while simultaneously confirming toxic and combustible sensor performance.
Concentration profile:
-
25 PPM Hydrogen Sulfide for toxic exposure sensor validation
-
50 PPM Carbon Monoxide for conservative CO alarm calibration
-
2.5% Methane (50% LEL) for combustible sensor verification
-
17.0% Oxygen for extreme oxygen-deficiency simulation
This blend is commonly specified for:
-
Confined space rescue drills
-
Emergency response simulation exercises
-
Industrial hygiene compliance programs
-
Facilities running aggressive oxygen alarm thresholds
-
Large safety departments managing multiple detectors
The 120L cylinder supports extended calibration cycles and high-frequency bump testing environments, reducing cylinder replacement intervals in multi-shift operations.
Gas Concentrations
| Component | Concentration |
|---|---|
| Hydrogen Sulfide (H₂S) | 25 PPM |
| Carbon Monoxide (CO) | 50 PPM |
| Methane (CH₄) | 2.5% (50% LEL) |
| Oxygen (O₂) | 17.0% |
| Balance | Nitrogen |
Cylinder Specifications
| Property | Value |
|---|---|
| Cylinder Size | 120L (4.2 ft³) |
| Pressure | 1050 psi |
| Cylinder Specification | C-10 |
| Cylinder Material | Aluminum |
| Gas Reactivity | Reactive |
Reactive multi-gas blends require compatible C-10 regulators to maintain mixture stability and calibration accuracy.
Applications & Detector Compatibility
Compatible with most major portable multi-gas monitors used for toxic, combustible, and oxygen detection, including BW, MSA, Industrial Scientific, RAE Systems, and Dräger.
Ideal for:
-
Extreme oxygen-deficiency alarm verification
-
High-volume bump testing programs
-
Confined space safety management
-
Multi-unit gas detection fleets
-
Industrial compliance audits
The 120L format is optimal for facilities requiring extended-use calibration capacity.
Need a Different Concentration or Cylinder Size?
If you do not see the exact gas mixture, ppm level, oxygen percentage, LEL value, or cylinder size required for your application, contact our calibration gas specialists. We can supply custom multi-gas blends tailored to your detector model, regulatory standards, or site-specific safety requirements.
