The Mettler Toledo InPro6860i Optical Dissolved Oxygen Sensors are designed for in-line dissolved oxygen measurement in process analytics and bioreactor applications where bubble accumulation at the sensing surface can affect measurement stability.
The family uses optical dissolved oxygen sensing technology with a mechanically modified hydrophilic surface and tilted sensor design to help limit bubble buildup at the sensor tip.
Available InPro 6860i configurations include 120mm and 420mm sensor lengths with model-specific output options for compatible process systems.

The family is suited for dissolved oxygen measurement in pharmaceutical, biopharmaceutical, biotechnology, and cell culture applications requiring optical DO sensor integration.
Key Characteristics
- Optical dissolved oxygen sensors for in-line dissolved oxygen measurement
- Mechanically modified hydrophilic surface with tilted sensor design to help limit bubble accumulation
- Designed for bioreactor and process analytics applications
- Available in 120mm and 420mm sensor configurations
- Model-specific output options include mA and nA configurations
- InPro6860i/12/120/mA/HD configuration supports 4–20 mA signal communication with HART capability
- PTFE wetted membrane material and straight connector design available on the InPro6860i/12/120/mA/HD configuration
Ideal Applications
- In-line dissolved oxygen measurement in process analytics applications
- Bioreactor dissolved oxygen measurement
- Installations where bubble accumulation at the sensor surface is a concern
- Process environments requiring optical dissolved oxygen sensor integration
- Applications using compatible Mettler Toledo dissolved oxygen sensor housings or control system connections
Product Family Includes
- InPro6860i/12/120/mA/HD Optical Dissolved Oxygen Sensor
- InPro6860i/12/420/nA/HD Optical Dissolved Oxygen Sensor
- 120mm InPro 6860i mA configuration with 4–20 mA HART capability
- 420mm InPro 6860i nA configuration for compatible dissolved oxygen measurement setups
Industries Served
- Pharmaceutical Manufacturing
- Life Science Production
- Biopharmaceutical/Biologics Production
- Biotechnology
- Cell Culture and Fermentation Processing
- Laboratory, Pilot-scale, and Production Bioreactor Operations






