Alternative proteins are currently on everyone's lips. The market for alternative proteins has attracted a lot of attention in recent years. To meet global challenges such as climate change and hunger in large parts of the world, more and more companies are working on the production of so-called alternative proteins. Many of these alternative proteins are produced by fermentation. The target proteins are then produced by genetically modified microorganisms in a bioreactor. BlueSens analyzers support these processes by providing engineers, biotechnologists and technicians with important data on the metabolic state of the microorganisms. In the field of alternative proteins, scale also plays a particularly important role. In order to be able to test as early as possible whether the protein produced will be accepted, it is important to produce it quickly on a larger scale. The development from small laboratory bioreactors to large industrial scale is called scale-up. Scale-up requires scale-independent data, such as exhaust gas data.