| Advanced Test Environments | | Manufactures test equipment for commercial and military aircraft maintenance operations, electronic test equipment for schools, surveilance and ham radio test equipment. |
| Altadox Electronics Manufacturer | | Manufactures multimeters, clamp-on meters, megohmmeters, thermometers, vibrometers, tachometers, LUX meters, function generators, oscilloscopes, frequency counters and calibrators. |
| ATAL B.V. | | Data recorders, monitorings systems, portable meters and sensors. |
| Automation Industries Corporation | | Manufacturer of non-destructive testing equipment and manufacturing control devices for thickness measurement and internal defects in wood, plastic, rubber, and laminates. |
| Avatar Engineering Corporation | | A specialty and standard electronics manufacturer. Specialty focus is OEM assemblies, power supplies, embedded controls, and specialty transformers. Standard products include test equipment, load banks, minimeters, embedded software. |
| Bird Electronic Corporation | | Manufacturer of RF power measurement, loads and other related equipment for the broadcast, semiconductor and wireless industries. |
| BK Precision | | Manufacturer of a wide range of test and measurement equipment, multimeters, and oscilloscopes. |
| Clare Instruments | | Manufacturers of safety electrical products, hipot testers, ground bond testers and EN50191 modules. |
| Cropico, Ltd. | | Manufacturer of test instrument; digital ohmmeters and thermometers, resistance and capacitance decades and bridges, thermocouple and PRT switches. |
| Fluke | | Manufacturer of electronic test and measurement tools, network troubleshooting equipment, cable testers, digital multimeters, electrical testers, process calibrators and calibration equipment. |
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