The safety management of university laboratories is an important prerequisite and foundation for achieving normal education, teaching, and scienti c research among teachers and students in universities. It is necessary to always keep laboratory safety management in mind. The safety management of university laboratories involves di erent majors and disciplines, with strong professionalism and complexity. Smart sensing is the key to achieving dynamic real-time visualization, transparency, and traceability of various experimental elements, such as hazardous reagents, experimental equipment, and experimental operators, in the safety management process of university laboratories. As an example, a smart sensing scheme for laboratory hazardous chemical reagents with capacitive liquid level has been proposed in this paper. It has combined the theoretical knowledge of smart sensing with practical safety practices, such as hazardous chemical reagents in the laboratory, to achieve the design of a complete sensing system, relying on open-source and easy-to-use software and hardware systems to assist in the rapid development and implementation of sensing system design and implementation, improve theoretical practice and application e ciency, and assist in laboratory security management practice exploration. It could lay the foundation for the integrated application of real-time dynamic traceability and visualization of laboratory safety management information in the future.