Questions? Feedback? powered by Olark live chat software

Shop by Category

4-Gas Calibration Gas (Quad Gas Mixtures)

4-Gas Calibration Gas & Quad Gas Mixtures

Cal Gas Direct supplies precision, NIST-traceable 4-gas calibration mixtures and quad-gas bump test cylinders engineered for daily sensor verification and full span calibration of multi-gas confined space monitors. Formulated to meet strict OSHA 29 CFR 1910.146 compliance standards, our four-component mixtures guarantee analytical accuracy and reliable sensor response across all leading instrument platforms.

Standard Quad-Gas Formulations & Cylinders

  • Standard 4-Gas Confined Space Formulation: 25 PPM Hydrogen Sulfide (H2S), 100 PPM Carbon Monoxide (CO), 50% LEL Methane (CH4 / 2.5% Vol) or Pentane equivalent simulant, and 18% Oxygen (O2) balanced in Nitrogen (N2).
  • Instrument Compatibility: Engineered for seamless calibration of BW Technologies (Honeywell GasAlert / MicroClip), MSA (Altair 4XR / 5X), Industrial Scientific (Ventis MX4), RAE Systems (QRAE 3), and RKI multi-gas monitors.
  • Cylinder Sizes & Specifications: Supplied in lightweight, corrosion-resistant aluminum cylinders—available in 34L, 58L, 105L EcoSmart, and 116L capacities—fitted with standard universal C-10 (5/8"-18) valve connections compatible with fixed-flow and on-demand flow regulators.
  • NIST Traceability & Certification: Each cylinder ships with an individual Certificate of Analysis (COA) detailing batch lot numbers, analytical blend tolerances, and extended expiration stability.

Need an alternative LEL combustible target (Pentane, Propane simulant, or Hexane), custom component concentrations, or matching regulators? Contact our technical team for immediate quotes and rapid dispatch.