BioPAT® Xgas RS485 Cable

The BioPAT® Xgas system enables real-time monitoring of exhaust gas from bioprocesses. It is a dual oxygen–carbon dioxide sensor featuring automatic compensation of humidity and pressure. Oxygen concentrations can be measured in the range of 1–50%, and carbon dioxide concentrations in the range of 0–10%.

Key features:

• Single-sensor determination of O₂ and CO₂
• Integration into Biostat® systems and BioPAT® MFCS
• Monitoring of metabolic processes
• Tool for process and yield optimization
• Compact design for flexible use
• Automatic humidity and pressure compensation

For each connection method, Sartorius Stedim provides the necessary data cables and digital conversion boxes as part of dedicated integration packages, suitable for computer-based integration or for use with BioPAT® DCU.

The BioPAT® Xgas cables are components of the BioPAT® Xgas system and are used for power and data transmission between the Xgas analyzer and the respective control units:

• The Serial Modbus connection cable is used to connect multiple BioPAT® Xgas units in sequence.
• The RS485 cable (M12–SubD) serves as a signal and power transmission cable between the BioPAT® Xgas system and the control unit.
• The BioPAT® Xgas signal cable is designed for use with Biostat® B systems and establishes communication between the BioPAT® Xgas analyzer and the Biostat® B controller.

As all living cells consume O₂ and produce CO₂, the overall activity of your culture can be understood from its respiration behavior. By combining a Sartorius Stedim Biostat^® bioreactor with mass flow controllers and the integrated BioPAT^® Xgas, you can accurately measure the oxygen uptake rate (OUR) and carbon dioxide production rate (CPR) and automatically calculate the respiratory quotient (RQ) of your process.

These calculations are performed by Biobrain® Supervise, which takes into account dynamic changes in your process conditions. The sensor itself automatically compensates for pressure and humidity, so there is no need for heated exhaust lines.

The BioPAT^® Xgas fermenter package provides a powerful process development tool that can shorten your process optimization time by giving a clearer online understanding of your cells’ metabolic activity. Furthermore, with cumulative O₂ uptake or CO₂ production data, automated control loops can be established using Biobrain^® Supervise S88 recipes, guiding your process along a tighter operating window and delivering higher consistency.

The high sensitivity of BioPAT^® Xgas to small changes in O₂ and CO₂ concentrations also enables early detection of faults in dissolved O₂ probes and supports analysis of CO₂ stripping efficiency.