50% LEL Propane Calibration Gas by GASCO 

GASCO Propane 50% LEL Calibration Gas also known as Propane LEL Cal Gas, is used for the calibration and maintenance of gas detectors/monitors. All of our Calibration Gas Cylinders ship with a COA (Certificate Of Analysis). Our calibration gas is NIST Traceable, Made in the USA, and produced using an ISO9001:2008 certified process