| Aerodyne Research, Inc.: Provides instrumentation and consulting for environmental air quality monitoring and measurements. |
| Ecotech World Class Air & Water Monitoring: Specializes in ambient air and emissions monitoring instruments and provides solutions for process gas and water monitoring applications. |
| Horiba Instruments, Inc.: Manufacturer and supplier of CEMS, ambient, and process gas instrumentation. |
| Michigan Aerospace Corporation: Lidar based weather sensing systems and optical air data systems. |
| NanoVapor Technologies: Specializes in safety, regulatory and environmental compliance markets, specifically in gas phase and aqueous phase waste stream control. |
| Sunset Laboratory, Inc.: Designs and provides instruments for analysis of carbonaceous aerosol for both lab-based and semi-continuous field measurements. |
| TSI Incorporated -: Designs and manufactures instruments used to measure flow, particulate, and other key parameters in environmental research. |