- AirTest Technologies Inc.
- Smiths Detection Inc.
- General Electric Co.
- Hans Turck GmbH & Co. KG
- Honeywell International Inc.
- MSA Safety Incorporated
- Pepperl+Fuchs Group
- SenseAir AB
- SICK AG
- Siemens AG
- ABB Ltd
- Spectris PLC
- Halma PLC
- Denso Corporation
- Owlstone Inc.