1. ABB Ltd.
2. Acustrip Company Inc.
3. Agilent Technologies Inc.
4. Alpha MOS
5. AMETEK Inc.
6. Apera Instruments
LLC
7. Apure by Shanghai GL Environmental Technology Co. Ltd.
8. Emerson Electric Co.
9. Endress+Hauser Group Services AG
10. General Electric Company
11. Hach Company by Danaher Corporation
12. Hanna Instruments Inc.
13. Honeywell International Inc.
14. HORIBA Ltd.
15. In-Situ Inc.
16. Istek Inc.
17. Jenco Instruments
18. Johnson Controls International PLC
19. Mettler-Toledo International Inc.
20. Myron L Company
21. OMEGA Engineering inc.
22. Owlstone Inc.
23. Panomex Inc.
24. PCE Holding GmbH
25. PerkinElmer Inc.
26. Sato Keiryoki Mfg. Co. Ltd
27. Shimadzu Corporation
28. Sper Scientific Direct
29. Taylor Water Technologies LLC by Fluidra S.A.
30. Teledyne Monitor Labs by Teledyne Technologies Incorporated
31. Texas Instruments Incorporated
32. Thermo Fisher Scientific Inc.
33. Xylem Inc.