| Business | Phone |
| Armatek Controls Ltd 260 Tecumseh St, Sarnia N7T 2K9 | (519) 332-0100 |
| Great Lakes Ind Controls 1387 Confederation St, Sarnia N7S 5P1 | (519) 336-9512 |
| Provincial Controls 840 Philip St, Sarnia N7T 1Z6 | (519) 336-7301 |
| Lakeside Process Controls Ltd 581 Vidal St S, Sarnia N7T 2V8 | (519) 332-2300 |
| Endress & Hauser 78 Turner Dr, Sarnia N7S 4L3 | (519) 336-8054 |
| North Central Engineering 202 Oakburne Pl, Sarnia N7S 4X3 | (519) 337-5608 |
| Northern Abcor Process Systems 635 Scott Rd, Sarnia | (519) 383-7993 |
| Regional Process Equipment Sls 775 Roper St, Sarnia N7S 6G7 | (519) 337-7758 |
| Sarnia Piping Specialties Ltd 765 Evett St, Sarnia N7S 5N3 | (519) 336-8820 |
| Willer Engineering Ltd 373 Vidal St S #A, Sarnia N7T 2V3 | (519) 336-3006 |
| C B Engineering Ltd 265 Front St N #411g, Sarnia N7T 7X1 | (519) 339-9330 |
| Elsag Bailey Inc 515 Vidal St S, Sarnia N7T 2V5 | (519) 332-8448 |
| Foxboro Canada Inc 1355 Confederation St #4, Sarnia N7S 4T2 | (519) 339-9772 |