| S.no | Company Name | Founded | Country |
|---|---|---|---|
| 1 | Pilz Automation Safety L.P. | USA | |
| 2 | Littelfuse Inc. | USA | |
| 3 | SE Relays | USA | |
| 4 | Fairchild Industrial Products a Rotork Instruments company | USA | |
| 5 | Celduc Inc. | USA | |
| 6 | ABB | USA | |
| 7 | Dynamp | USA | |
| 8 | Comus International | USA | |
| 9 | STK Electronics Inc. | USA | |
| 10 | C.J. Anderson & Company | USA | |
| 11 | Basler Electric Co. | USA | |
| 12 | CII Technologies | USA |
