Over the past decade, the application of chemical optical sensors for bioprocess monitoring has gradually taken roots. Constant further development of this measurement technology and the possibility to manufacture such sensors in various designs (even for single-use applications) have led to new state-of-the-art devices for the biotechnology sector. Chemical optical sensors enable in situ, real-time monitoring of important culture parameters without sampling and therefore without disturbing a culture. Implementing this technology can decrease workloads and deepen knowledge about bioprocesses. In…