Gasco 58L-401B-17 Precision Calibration Gas 250 ppm CO 50% LEL Methane (2.5% Vol.), 25 ppm H2S, 17% O2 58 Liter

Description

Carbon Monoxide 50% LEL Methane, Hydrogen Sulfide H2S, Oxygen O2 Calibration Gas or Cal Gas contained in an Aluminum or Steel Cylinder that is used for calibration and maintenance of gas detectors. NIST Calibration Certificate Included. GASCO Calibration Gas is ISO 9001 Certified.