?- Schlumberger Limited
- Halliburton Company
- Yokogawa Electric Corporation
- Weatherford International PLC
- Sumitomo Electric Industries
Ltd.
- Banner Engineering Corp
- AP Sensing GmbH
- OMICRON Electronics GmbH
- OFS Fitel
LLC
- Bandweaver Technologies
- GESO GmbH & Co.
- NKT Photonics
- Omicron Electronics GmbH
- Micron Optics Inc.
- Sensornet Limited