| Business | Phone |
| Controls Of Houston 2705 Frick Rd, Houston 77038 | (281) 448-4076 |
| Control Panel Specialist 1617 Peach Leaf St 118, Houston 77039 | (281) 449-2328 |
| Custom Controls Co 6320 Alder Dr, Houston 77081 | (713) 666-3258 |
| Mesa Products Inc 16740 Hedgecroft Dr 412, Houston 77060 | (281) 445-8700 |
| National Oilwell Varco 1530 W Sam Houston Pkwy N, Houston 77043 | (713) 468-8660 |
| Sentinel Instruments Usa Inc 1120 Nasa Rd 1, Houston 77058 | (281) 333-1739 |
| Sprecher & Schuh 15910 International Plaza Dr, Houston 77032 | (281) 442-9000 |
| South Coast Technology 12227 Fm 529 Rd 1, Houston 77041 | (713) 466-9947 |
| Total Engineering Svc Team 6213 W Sam Houston Pkwy N, Houston 77041 | (713) 467-3113 |
| Thompson Scale Co 2758 Bingle Rd, Houston 77055 | (713) 932-9071 |
| Powell Industries Inc 8550 Mosley Rd, Houston 77075 | (713) 944-6900 |
| Omron Oilfield & Marine 9510 N Houston Rosslyn Rd, Houston 77088 | (713) 849-1900 |