Draeger, Inc. - DRA 4594639 - Test gas 34 L, CH4, CO, H2S, O2/N2

50% LEL Methane / 17% Oxygen / 100 ppm Carbon Monoxide / 25 ppm Hydrogen Sulfide / Balance Nitrogen Draeger equivalent multi-mixture calibration gas used to calibrate Draeger gas detection equipment.Fully compatible with Draeger gas detectors requiring specified cal gas mixture.Precision blended and inspected to industry standards - National Institute of Standards and Technology (NIST) traceable and certified.Made in the USA by GASCO, ISO 9001:2008 Certified.