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Recently, the Changchun Yinghua Institute of the Chinese Academy of Sciences has successfully developed a new type of oxygen sensor and measuring instrument that features an innovative design, compact size, low cost, strong stability, long service life, a wide detection range, and high sensitivity. This technology is equipped with independent intellectual property rights and has passed expert evaluation organized by the Science and Technology Department of Jilin Province. Experts have stated that this new oxygen sensor and meter have reached a domestic leading level in terms of detection range and sensitivity.
Oxygen analysis plays a crucial role in various fields such as medicine, biology, industrial energy, and environmental protection. The market for oxygen sensors is vast, with the demand for electrochemical oxygen sensors in different industries nearly matching the total demand for other types of gas sensors. In recent years, as people's health awareness has increased and stricter regulations on toxic gas and pollutant emissions have been implemented globally, there has been a growing need for advanced oxygen detection technologies. As a result, new mechanisms and structures for oxygen sensors and testing devices have become key research areas in the global sensor industry.
In response to challenges faced by China's current electrochemical oxygen sensors—such as limited detection range, insufficient sensitivity, and environmental constraints—the Changchun Yinghua Institute, supported by the Science and Technology Department of Jilin Province and in collaboration with Changchun University, initiated a research project under the Jilin Provincial Science and Technology Development Plan in 2003. Over four years of dedicated effort, the team focused on leveraging their long-term technical and human resources in electrochemical gas sensors, combining applied basic research with R&D to solve practical problems and drive innovation.
The breakthroughs achieved include the development of an electrochemical three-electrode semi-solid design, which eliminates consumable materials and significantly extends the sensor's lifespan. By incorporating semi-solid and nano-scale catalysts, the sensor's sensitivity has been greatly enhanced, achieving a detection limit at the PPM level. This expansion of the detection range allows for accurate measurement of low-level oxygen in gas environments. Additionally, the use of diffusion barrier shunt control technology broadens the upper detection limit, enabling measurements up to 100% oxygen. The Pt-Fe alloy technology not only improves the catalytic layer structure but also enhances catalyst activity, making the sensor more suitable for real-world applications.
Testing conducted by the Jilin Province Metrology and Product Quality Supervision Station confirmed that the sensor meets or exceeds standard requirements in terms of indication error, repeatability, response time, zero drift, and span drift across three concentration levels: low (500×10â»â¶ mol/mol), normal (25%), and high (100%).
The Changchun Industrial Boiler Factory and the Jilin Province Power System Environmental Testing Center have praised the sensor for its compact size, ease of operation, fast response, stable performance, and short return period, making it ideal for industrial and environmental monitoring needs.
Experts believe that this new sensor has revolutionized the traditional design concept of oxygen gas sensors, offering a novel technical approach for oxygen detection and providing fresh insights for other gas detection technologies.