| S.no | Company Name | Founded | Country |
|---|---|---|---|
| 1 | WATTCO | USA | |
| 2 | Thermocouple Technology LLC | USA | |
| 3 | Turbine Services Ltd. | USA | |
| 4 | LPG Industries Inc. | USA | |
| 5 | Heaters & Sensors Inc. | USA | |
| 6 | W. H. Cooke & Co. Inc. | USA | |
| 7 | Thermocoax Inc. | USA | |
| 8 | Duro Sense Corp. | USA | |
| 9 | Cleveland Electric Laboratories | USA | |
| 10 | Thermo/Probes Inc. | USA | |
| 11 | Sandelius Instruments Inc. | USA | |
| 12 | Marsh Bellofram Corp. | USA | |
| 13 | Precision Measurements Inc. | USA | |
| 14 | AMETEK Power Instruments | USA | |
| 15 | GeoCorp Inc | USA | |
| 16 | Ultra Energy | USA | |
| 17 | Tempora Heating Elements Inc. | USA | |
| 18 | Kawasaki Gas Turbines | USA | |
| 19 | Valin Thermal Solutions & Automation | USA | |
| 20 | Thermocouple USA Inc. | USA | |
| 21 | GIC Thermodynamics | USA |
