?- Fluke Biomedical
- Draegerwerk AG & Co. KGaA
- Teledyne Technologies Incorporated
- Maxtec LLC
- Servomex Group Ltd
- QED ENVIRONMENTAL SYSTEMS LTD
- WITT-Gasetechnik GmbH & Co KG
- Systech Instruments Ltd and Illinois Instruments Inc.
- Bruker
- Kimo