Apex Instruments

Founded in 1988, Apex Instruments has grown from a single-source provider of EPA-compliant stack-testing kits into a global leader in air monitoring technology. From our manufacturing facility in Fuquay-Varina, NC—just 23 miles from the U.S. EPA’s Research Triangle Park campus —we design, machine, and assemble more than 3,000 distinct parts and instruments in-house, shipping to customers in 80-plus countries on six continents.

Our portfolio now spans digital and manual isokinetic source samplers, ambient air sensor networks, VOC analyzers, heated sample lines, calibration systems, and specialty probes. Dedicated divisions build turn-key mobile laboratories and rugged custom trailers, while our cloud-based data workflows deliver real-time insight for regulators, researchers, and industry operators alike.

What sets us apart is deep field experience: many of our engineers, trainers, and technical service representatives are former stack testers who understand the realities of compliance monitoring. Their expertise drives continuous innovation and fuels the comprehensive training workshops we host throughout the year.

Whether you need a single impinger or a fully integrated mobile emissions lab, Apex Instruments combines American craftsmanship, rapid lead times, and decades of technical know-how to keep your projects on schedule and your data defensible—today and for the next generation.