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This article will focus on the working principle of weighing modules, systematically elaborate on their role in bioreactor design, and emphasize the key selection points in bioengineering applications.

In a complete fermentation system, a bioreactor is not only a container for cell growth and reactions but also a highly coupled control platform for multiple parameters. Temperature interacts with parameters such as dissolved oxygen, pH, stirring, aeration, and feeding, among which temperature is one of the most basic, direct, and sensitive control variables. Therefore, as the "eyes" of the temperature control system in the fermentation process, temperature sensors occupy an extremely important position in bioreactor design.

In actual fermentation processes, due to the presence of proteins, polysaccharides, surfactants in the culture medium, and the influence of microbial metabolites, foaming is almost inevitable. Once foam is out of control, it will not only affect the effective working volume but also lead to contamination, sensor failure, material loss, and even potential safety hazards. Therefore, in the design of fermentation systems, defoaming is a key engineering issue that must be prioritized, and defoaming electrodes are one of the core detection components for achieving automated foam control.

For non-specialist readers, these components may seem complex and difficult to understand, yet they function like the "heart and blood vessels" of the equipment. They precisely transmit power and regulate the rhythm of operation, directly determining the efficiency and outcome of the biological reaction. From a popular science perspective, this article dissects the working logic, core components, and critical roles of this power system.