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Biosensors are a high-tech that has grown from the infiltration of multiple disciplines such as biology, chemistry, physics, medicine, and electronic technology. Biosensors are an interdisciplinary field that combines bioactive materials (enzymes, antibodies, antigens, proteins, DNA, biofilms, etc.) with physical or chemical transducers (sensors). They are an essential scientific detection and monitoring method for the development of biotechnology, as well as a rapid and trace analysis method for food safety, environmental monitoring, and substance molecular level analysis. In the future development of the knowledge economy in the 21st century, biosensor technology will undoubtedly be a new growth point between information and biotechnology. It has broad application prospects in clinical diagnosis, food safety, drug analysis (including biopharmaceutical research and development), environmental protection, industrial control, biotechnology, and bio chips, and is changing the face of traditional medicine, food science, environmental science, and botany. The research and development of biosensors has become a new hotspot in technological development, forming an important component of the emerging high-tech industry in the 21st century and having significant strategic significance.

1. By using immobilized bioactive substances as catalysts, expensive reagents can be reused multiple times, overcoming the disadvantages of high reagent costs and complex chemical analysis in the past enzymatic analysis.
2. Strong specificity, only reacting with specific substrates, and not affected by color or turbidity.
3. The analysis speed is fast, and results can be obtained in one minute.
4. High accuracy, with a general relative error of up to 1%.
5. The operating system is relatively simple and easy to implement automatic analysis.
6. Low cost, in continuous use, only a few cents of RMB are needed for each measurement.
7. Some biosensors can reliably indicate the oxygen supply status and byproduct production within microbial culture systems.

1. Food industry: The application of biosensors in food analysis includes food ingredient analysis, drug residue analysis, microbial and toxin analysis, food additive analysis, and food freshness analysis.
2. Environmental monitoring: The problem of environmental pollution is becoming increasingly serious, and biosensors have been widely used in water environment monitoring and atmospheric environment monitoring.
3. Fermentation industry: Among various biosensors, microbial sensors have the characteristics of low cost, simple equipment, not limited by the turbidity of fermentation broth, and can eliminate the interference of interfering substances during the fermentation process. Microbial sensors are widely used as an effective measurement tool in the fermentation industry. Mainly used for the determination of raw materials and metabolites, as well as the measurement of microbial cell numbers.
4. Medicine: Biosensing technology not only provides a fast and convenient new method for basic medical research and clinical diagnosis, but also has broad application prospects in military medicine and forensic science due to its specificity, sensitivity, and fast response.

With the advancement of achievements in biological science, information science, and materials science, biosensor technology is developing rapidly. The research on biosensors will mainly focus on the selection of highly active and selective biosensing elements, the stability of biological response, and the miniaturization and portability of biosensors. It can be foreseen that future biosensors will have the following characteristics:

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		Biosensor Biosensors are a high-tech that has grown from the infiltration of multiple disciplines such as biology, chemistry, physics, medicine, and electronic technology. Biosensors are an interdisciplinary field that combines bioactive materials (enzymes, antibodies, antigens, proteins, DNA, biofilms, etc.) with physical or chemical transducers (sensors). They are an essential scientific detection and monitoring method for the development of biotechnology, as well as a rapid and trace analysis method for food safety, environmental monitoring, and substance molecular level analysis. In the future development of the knowledge economy in the 21st century, biosensor technology will undoubtedly be a new growth point between information and biotechnology. It has broad application prospects in clinical diagnosis, food safety, drug analysis (including biopharmaceutical research and development), environmental protection, industrial control, biotechnology, and bio chips, and is changing the face of traditional medicine, food science, environmental science, and botany. The research and development of biosensors has become a new hotspot in technological development, forming an important component of the emerging high-tech industry in the 21st century and having significant strategic significance.