Apex Isokinetic Source Sampling Systems are rugged versatile equipment designed for extracting a representative flue gas sample from a source to determine dust and fumes emissions in accordance with many U.S. EPA Reference Methods as published in CFR 40 Part 60 Appendix A. The Apex Isokinetic Source Sampling System allows the operator to monitor gas velocities, temperatures, pressures and adjust sample flow rates to obtain a representative flue gas sample.