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| Applied Analytics |   | |
| Agilent Technologies |   | ||
| Altech Environmental |   | ||
| Ametek / Thermox |   | ||
| Antek Instruments, Inc. |   | ||
| Alpha Omega Instruments Corp. |   | ||
| Bacharach |   | ||
| BW Technologies |   | ||
| Comag IR Inc. |   | ||
| Cosa Instrument Corp. |   | ||
| Del Mar Scientific, Ltd. |   | ||
| Engineered Systems & Designs, Inc. |   | ||
| Rosemount Analytical Inc. |   | ||
| GOW-MAC Instrument Company |   | ||
| American Sigma |   | ||
| Hiden Analytical Ltd |   | ||
| ECO Physics, Inc. |   | ||
| Illinois Instruments, Inc. |   | ||
| Land Infrared |   | ||
| Micromonitors |   | ||
| Nova Analytical Systems |   | ||
| Panametrics |   | ||
| Royce Instrument Corporation |   | ||
| Servomex Company |   | ||
| TBI |   | ||
| Act Safe, Inc. |   | ||
| Vacuum Technology |   | ||
| VTI-Valtronics Inc. |   | ||
| Hach Company P.O. Box 389 - Loveland, CO 80539-0389 USA |   | ||
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