?- Cambridge Environmental Research Consultants Ltd
- Lakes Environmental Software
- Thermo Fisher Scientific Inc.
- Siemens AG
- Robert Bosch GmbH.
- Aeroqual Ltd.
- Horiba Ltd
- Envirotech Online.
- Merck KGaA,
- Honeywell HBT
- Teledyne Technologies Incorporated.
- Hawa Dawa GmbH
- Air Monitors Ltd