Air Liquide manufactures a complete line of calibration gases. Both pure gases and gas mixtures are available for use with instrumentation measuring engine emissions. Air Liquide is the major supplier of emission calibration gas standards to government and private industry for engineering and testing applications. Our success with our customers performing engine emission testing is attributed to our ability to provide identical gas mixtures in as many separate cylinders as required with our ACUBLEND™ process. Only Scott can supply mixtures with zero blend tolerance utilizing the ACUBLEND blending process. Contact us to inquire about available I/M products.