- Ashcroft|
- Raytek|
- Extech|
- Amprobe|
- Ametek|
- Additel|
- KANOMAX|
- AccuMac|
- HOBO|
- Jenway|
- KPSI Level Transducers|
- MadgeTech|
- Meriam Process Technologies|
- MET ONE|
- YSI|
- Time Electronics|
- Testo|
- Tel-Tru|
- Techne|
- Seametrics|
- Rotronic|
- Roscid Technologies|
- ProComSol|
- PolyScience|
- PIE Practical Instrument Electronics|
- Partlow|
- NoShok|
- Monarch Instrument|
- Mid-West Instrument|
- Micro-Epsilon|
- VARIAN|
- edwards|
- ANEST IWATA|
- UlVAC|
- alcatel|
- mitsuvac|
- Pfeiffer|
- BUSCH|
- BECKER|
- LEYBOLD|
- Ebara|
- Rietschle|
