- General Electric Co.
- Sensus
- Itron Inc.
- Wasion Group Holdings
- Elster Group Gmbh (Honeywell Intenational Inc)
- Landis + GYR Group AG
- Diehl?Stiftung GmbH & Co. KG
- Pietro Fiorentini
- Apator SA
- Yazaki Corporation
- Aichi Tokei Denki
- Meter Italia
- AEM
- Zenner International GmbH & Co. KG