GASCO Calibration Gas 437X-50 Mixture 50 PPM Hydrogen Sulfide, 50% LEL Propane, 18% Oxygen, Balance Nitrogen, For Use with Any and All Gas Detectors, Calibration Certificate NIST, Made in the USA

Our Precision Calibration Gas also known as Cal Gas, is used for the Calibration and Maintenance of Gas Detectors and Sensors. All of our GASCO Calibration Gas Cylinders ship with a Certificate of Analysis (COA). GASCO Calibration Gas meets or exceeds the requirements of the Original Gas Detection Equipment Manufactures Specifications. GASCO Calibration Gas is National Institute of Standards and Technology (NIST) Traceable, GASCO Calibration Gas is Made in the USA, and produced using an ISO 9001:2008 certified process.