| Business | Phone |
| Abb Inc 4828 Business Center Way, Cincinnati 45246 | (513) 860-1749 |
| Winstel Controls Co 1423 Queen City Ave, Cincinnati 45214 | (513) 251-4343 |
| B S & B Safety Systems 260 Northland Blvd # 317, Cincinnati 45246 | (513) 771-7034 |
| Quality Controls 3411 Church St, Cincinnati 45244 | (513) 272-3900 |
| Heat Equipment & Technology 951 W North Bend Rd, Cincinnati 45224 | (513) 591-3000 |
| Industrial Utility Sales 9799 Princeton Glendale Rd # E, Cincinnati 45246 | (513) 874-3665 |
| Kemper Automation 8150 Corporate Park Dr, Cincinnati 45242 | (513) 469-0440 |
| King Associates 10833 Millington Ct, Cincinnati 45242 | (513) 792-0393 |
| Main Control 4201 Airport Rd, Cincinnati 45226 | (513) 871-0600 |
| Meters & Controls Co 9244 Compton Square Dr, Cincinnati 45231 | (513) 931-5555 |
| Otr Controls 40 E Mcmicken Ave, Cincinnati 45202 | (513) 621-2197 |
| R K Combustion & Control Inc 5708 Hillside Ave, Cincinnati 45233 | (513) 941-2975 |
| Rilco 7667 Wooster Rd, Cincinnati 45227 | (513) 271-0630 |
| Stephen W Scholtz 7133 Glenellyn Dr, Cincinnati 45236 | (513) 891-0980 |
| Surkamp & Rowe Inc 4757 Cornell Rd, Cincinnati 45241 | (513) 489-2850 |