Hi there, 

Optical Density sensor Exner model 251 from www.e-p-e.com is a high-precision digital NIR absorption sensor in 12mm rod design for monitoring production processes in the biotech, food and pharmaceutical industries.

Connection for data collection via computer or if multiple in parallel to 6 channel Sipylus from www.cronus-pcs.com through Modbus RS485 or analogue 0…20 mA communication.

Here shown the Exner Optical Density Re-Useable-Sensor inserted into the non-invasive pre-installed BactoWell into BactoVessel from CerCell. The unique feature is the #251 sensing element being situated in the front of the OD 12 mm rod allowing the combination with non-invasive BactoWell.

Check out https://cercell.com/bioreactor-support/sensor-details/od-exner-optical-density

With kind regards from
Per Stobbe