| S.no | Company Name | Founded | Country |
|---|---|---|---|
| 1 | Meggitt Sensing Systems – Wilcoxon Research | USA | |
| 2 | Omega Engineering Inc. | USA | |
| 3 | Fairchild Industrial Products a Rotork Instruments company | USA | |
| 4 | PICS INC | USA | |
| 5 | DARE Electronics Inc. | USA | |
| 6 | Sierra Monitor Corporation | USA | |
| 7 | Spectec | USA | |
| 8 | IFM Efector Inc. | USA | |
| 9 | Control Instruments Corp. | USA | |
| 10 | Pyromation | USA | |
| 11 | Figaro USA Inc. | USA | |
| 12 | Devar Inc. | USA | |
| 13 | Arjay Engineering | USA | |
| 14 | Inventive Systems Inc. | USA | |
| 15 | EnviroGuard | USA | |
| 16 | Nova Analytical Systems | USA | |
| 17 | Aplus Finetek Sensor Inc. | USA | |
| 18 | ENMET | USA | |
| 19 | Bokam Engineering Inc. | USA | |
| 20 | Minco | USA | |
| 21 | New Avionics Corp. | USA | |
| 22 | Madison Company | USA | |
| 23 | Automation Products Inc. – Dynatrol Division | USA | |
| 24 | Dryer Master Inc. | USA | |
| 25 | Baumer Ltd. | USA | |
| 26 | Gems Sensors & Controls | USA | |
| 27 | Migatron Corp. | USA | |
| 28 | Contrex Inc. | USA | |
| 29 | Phymetrix Inc. | USA | |
| 30 | Imbotec Group | USA | |
| 31 | Celduc Inc. | USA |
