| Business | Phone |
| Specialty Process Equipment 333 Plaza East Blvd # D, Evansville 47715 | (812) 473-8528 |
| Process Control Concepts Inc 1525 N Heidelbach Ave, Evansville 47711 | (812) 424-6300 |
| M & L Electronics 2728 Hillcrest Ter, Evansville 47712 | (812) 425-9548 |
| Johnson Controls Inc 430 E Sycamore St, Evansville 47713 | (812) 424-1612 |