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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, wide detection range, and high sensitivity. This product also boasts independent intellectual property rights. It has passed expert evaluation organized by the Science and Technology Department of Jilin Province. Experts have stated that the new oxygen sensor and meter have reached a domestic leading level in terms of oxygen detection range and sensitivity.
Oxygen analysis is widely used across various fields, including medicine, biology, industrial energy, and environmental protection. The demand for oxygen sensors is huge, with electrochemical oxygen sensors accounting for nearly the total demand of all other gas sensors combined. With increasing public awareness of health and stricter regulations on toxic gas and pollutant emissions worldwide, there has been a growing need for advanced oxygen detection technologies, whether for gaseous or dissolved oxygen monitoring. In response to this trend, the development of new mechanisms and structures for oxygen sensors and testing instruments has become a major focus in global sensor research.
Faced with challenges such as limited detection ranges, insufficient sensitivity, and environmental constraints in existing electrochemical oxygen sensors in China, the country has often had to import foreign products at great expense. In response, the scientific and technical personnel at the Changchun Yinghua Institute, guided by national needs and the goal of enhancing core competitiveness, launched a research project under the Jilin Provincial Science and Technology Development Plan in 2003, in collaboration with Changchun University and with support from the Jilin Provincial Science and Technology Department.
Over four years of dedicated effort, they focused on their long-standing expertise in electrochemical gas sensors and integrated applied basic research with practical R&D. By addressing key technological challenges, they achieved breakthroughs in catalyst technology, gas diffusion control, and more. The sensor employs an electrochemical three-electrode semi-solid design, which is novel, consumes no materials, and offers a long lifespan. It uses semi-solid and nano-scale catalysts to significantly enhance sensitivity, achieving a detection limit of parts per million (PPM), thereby expanding the detection range and enabling accurate PPM-level oxygen detection in gas environments. Additionally, by employing diffusion barrier shunt control technology, the upper detection limit has been extended to 100%. The use of Pt-Fe alloy technology not only changes the structure of the catalytic layer but also greatly improves its activity and overall sensor sensitivity, making it more suitable for real-world applications.
Testing conducted by the Jilin Provincial Metrology and Product Quality Supervision Station confirmed that the sensor meets or exceeds standard requirements for indication error, repeatability, response time, zero drift, and span drift across low, medium, and high concentration ranges (500×10â»â¶ mol/mol).
The Changchun Industrial Boiler Factory and the Jilin Provincial Power System Environmental Testing Center have also recognized the advantages of the new sensor, including its compact size, ease of operation, fast response, stable performance, and short return time, making it ideal for industrial and environmental monitoring needs.
Experts believe that this new sensor has broken away from traditional oxygen detection concepts, offering a fresh technical approach and opening up new possibilities for other gas detection applications.