1. Advanced Gas Technologies Inc.
2. Air Products and Chemicals Inc.
3. Atlas Copco AB
4. Cummins Inc.
5. Eaton Corporation PLC
6. F-DGSi
7. Generac Power Systems Inc.
8. Hitachi Industrial Equipment Systems Co. Ltd.
9. HORIBA
Ltd.
10. IHI Corporation
11. Kashiwa Tech Co. Ltd.
12. Kuraray Co. Ltd.
13. Leman Instruments SAS
14. LNI Swissgas Srl
15. On Site Gas Systems Inc.
16. Pst Technology Private Limited
17. Rolls-Royce PLC
18. Sigma Scientific Glass Pvt. Ltd.
19. Super Systems UK Ltd.
20. Survitec Group Limited
21. Thermo Fisher Scientific Inc.
22. Weber Scientific
23. W?rtsil? Corporation
24. ZAGENO Inc.