Air Liquide introduced Scott brand 72.2 Certified ZAM (zero air material) to meet 40 CFR Part 75 regulations, which call for a continuous emission monitoring (CEM) system to be exposed to “zero air material” during testing protocols in order to qualify the accuracy of the instrument. Air Liquide achieves a balance between regulatory compliance certainty and cost-effectiveness by offering three types of Part 75–compliant zero air materials: 72.2 Certified ZAM Air, 72.2 Certified ZAM Nitrogen, and 72.2 Certified ZAM RATA Class Oxygen EPA Protocol.

By using these certified zero products, the risk of faulty calibration due to biased zero readings is eliminated. Zero air material is available from Air Liquide in three cylinder sizes with Part 75–compliant Certificates of Analysis. (