| 1 | Dioxide Materials | | USA |
| 2 | SmartSchool Systems | | USA |
| 3 | Davis Instruments | | USA |
| 4 | Nyad Inc. | | USA |
| 5 | SenseAir America | | USA |
| 6 | Hatch Company | | USA |
| 7 | Gaslab.com | | USA |
| 8 | Sunburst Sensors LLC | | USA |
| 9 | Sierra Monitor Corporation | | USA |
| 10 | Vaisala Inc. | | USA |
| 11 | CO2 Meter Inc. | | USA |
| 12 | SweetSense Inc. | | USA |
| 13 | E+E Elektronik Corp. | | USA |
| 14 | Core Sensors | | USA |
| 15 | TempGenius | | USA |
| 16 | Mettler-Toledo | | USA |
| 17 | Voltree Power LLC | | USA |
| 18 | Kumbaya Inc. | | USA |
| 19 | Weiss Instruments Inc. | | USA |
| 20 | AMETEK PI Combustion | | USA |
| 21 | GDS Corp. | | USA |
| 22 | C-Lock Inc. | | USA |
| 23 | SensoScientific | | USA |
| 24 | Isensix Inc. | | USA |
| 25 | Sylvania | | USA |
| 26 | Onset Computer Corporation | | USA |
| 27 | BioLumix Inc. | | USA |
| 28 | Johnson Controls Inc. | | USA |
| 29 | Pem-Tech Inc. | | USA |
| 30 | Trane – California District | | USA |
| 31 | Bard Manufacturing Company | | USA |
| 32 | Advanced Chemical Sensors | | USA |
| 33 | Alpha Omega Instruments Corp. | | USA |
| 34 | Senva Inc. | | USA |
| 35 | Figaro USA Inc. | | USA |
| 36 | Cubic Sensor and Instrument Co. Ltd. | | USA |
| 37 | IFM Efector Inc. | | USA |
| 38 | AMETEK Process Instruments | | USA |
| 39 | MSA Safety | | USA |
| 40 | AMETEK MOCON | | USA |
| 41 | DOD Technologies | | USA |
| 42 | Arjay Engineering | | USA |
| 43 | Design Criteria Inc. | | USA |
| 44 | Oxigraf Inc. | | USA |
| 45 | Inovonics Corporation | | USA |
| 46 | Polestar Technologies Inc. | | USA |
| 47 | ENMET | | USA |
| 48 | Munters Corporation – AirTech | | USA |
| 49 | Innovaer Technologies | | USA |
| 50 | SMT Research Ltd. | | USA |
| 51 | Siemens Corporation | | USA |
| 52 | COSA Xentaur Corp. | | USA |
| 53 | Sensirion Inc. | | USA |
| 54 | MSA The Safety Company | | USA |
| 55 | Rivercity Innovations Ltd. | | USA |
| 56 | eze System Inc. | | USA |
| 57 | Kanomax USA Inc. | | USA |
| 58 | IMR Enviromental Equipment Inc. | | USA |
| 59 | IESP Group | | USA |
