Multiple component portable calibration gas mix: 25 PPM Hydrogen Sulfide, 100 PPM Carbon Monoxide, 1.25% (50% LEL) Pentane Simulant, 18% Oxygen, Balance Nitrogen in 29 Liter Aluminum Cylinder. Use to calibrate any gas detector requiring the specified gas concentration and mixture. Manufactured under ISO:9002 quality standards by NorLab Specialty Gases with NIST traceability certification.
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