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| TPS Pty Ltd | |
| Control Co. | ||
| Megatron Electronics & Controls | ||
| Yokogawa Corp. Of America | ||
| Mikron Instrument Company, Inc. | ||
| Omega Engineering, Inc. | ||
| Keithley Instruments | ||
| Amprobe | ||
| Thermo Electric Company | ||
| Dresser Instrument 250 East Main Street - Stratford, CT 06497 USA - - | ||
| Hart Scientific | ||
| Winters Instruments | ||
| Extech Instruments | ||
| Reotemp Instrument Corporation | ||
| Wavetek Wandel Goltermann 1030 Swabia Court - Triangle Park, NC 27709 USA - - | ||
| PMMI, Inc. | ||
| huaan medical&health instruments co., ltd. | ||
| Coast Scientific | ||
| Fluke 6920 Seaway Blvd - PO Box 9090 - Everett, WA 98206 USA - | ||
| Guildline Instruments Inc. | ||
| Consort nv | ||
| Jenco Instruments Inc. | ||
| Chromalox | ||
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