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| Chromalox | |
| RTD Company | ||
| Precision Resistor Co., Inc. | ||
| Building Automation Products, Inc. BAPI | ||
| Daily Thermetrics / Daily Thermocontrol | ||
| U.S. Sensor Corp. | ||
| SEI Electronics / Stackpole | ||
| Advanced Thermal Products / ATP | ||
| Honeywell | ||
| Palmer Wahl Instruments Inc. | ||
| Furnace Parts, LLC | ||
| Reotemp Instrument Corporation | ||
| Honeywell Sensing and Control | ||
| Temp Pro Inc. | ||
| Pyromation Inc. | ||
| Winters Instruments | ||
| Conax Buffalo Technologies | ||
| Arklay S. Richards Company | ||
| Love Controls (Division of Dwyer Instruments) | ||
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