- AEMC
- Amprobe
- Armada Technologies
- Bacharach
- BI Communications
- Byte Brothers
- Dent Instruments
- E Instruments
- Enerac
- Extech
- FLIR
- Fluke
- General Tools
- Greenlee
- Hobbes
- Ideal Industries
- Inficon
- Mannix Instrument
- MetaGeek
- Photonix
- Promax
- Protek
- Psiber
- Radiodetection
- Robinair
- Schonstedt
- Shimpo Instruments
- TASCO
- Tempo
- Test-Um
- Testo
- TIF Instrument
- TSI Alnor
- UEi Instruments
- UNISOURCE Corporation
- Wohler
- Yellow Jacket