Control Relay Manufacturers
| Therm-O-Disc Inc (Muskegon, MI) |
| Tyco Electronics Corp (Glen Rock, PA) |
| Westinghouse Electric Co (Pittsburgh, PA) |
| Barton Instrument Systems, LLC (City of Industry, CA)
Manufacturer |
| A & L Relay Svc (Schererville, IN) |
| A & M Engineering Llc (Dallas, TX) |
| A C Gentrol Inc (Chillicothe, IL) |
| A T Systems Inc (Yorkville, IL) |
| Abb Inc (Wichita Falls, TX) |
| Abb Inc (Pompano Beach, FL) |
| Ability Systems Corp (Abington, PA) |
| Accurate Cnc (Fort Wayne, IN) |
| Ace Industrial Supply Inc (Schoolcraft, MI) |
| Acme Control Svc Inc (Chicago, IL) |
| Adgo Inc (Cincinnati, OH) |
| Advanced Motors & Drives (East Syracuse, NY) |
| Advantage Controls Llc (Muskogee, OK) |
| Aec Electric (Garden City, ID) |
| Aerotech Inc (Pittsburgh, PA) |
| Aerovista Assemblies (Dallas, TX) |
| Air Instruments & Measurements (La Puente, CA) |
| Air-O-Tronics (Cazenovia, NY) |
| Albright's Cnc Support Svc (Bozeman, MT) |
| Allied Controls Acquisition (Waterbury, CT) |
| Alpha Valve & Controls Inc (Tampa, FL) |
