- AEM SA
- Aichi Tokei Denki
- Apator SA
- Arad Group
- Azbil Kimmon Co. Ltd
- Badger Meter Inc.
- Chongqing Smart Water Meter Group
- Diehl Stiftung & Co. KG
- Elster Group GmbH (Honeywell International Inc.)
- General Electric company
- Hexing Electric company Ltd
- Holley Technology Ltd
- Itron Inc.
- Jiangsu Linyang Energy Co. Ltd
- Kamstrup A/S
- Landis+ GYR Group AG
- Meter Italia
- Mueller Systems LLC
- Nanjing Xinlian Electronics Co. Ltd
- Neptune Technology Group Inc.
- Ningbo Sanxing Electric Co. Ltd
- Pietro Fiorentini
- Sagemcom SAS
- Sensus USA Inc. (Xylem Inc.)
- Shenzhen Hemei Group Co. Ltd
- Wasion Group Holdings
- Yazaki Corporation
- Zenner International GmbH & Co. KG