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Vacuum Based Gas Sensing Material Characterization System for Precise and Simultaneous Measurement of Optical and
Jie Wei1, Meng Zhao1, Cong Wang2
1Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, Suzhou University of Science and Technology, Suzhou 215009, China.
Sensors (Basel, Switzerland)
|February 15, 2022
Summary
A new gas sensing characterization system uses vacuum technology to significantly improve gas concentration control accuracy and enables simultaneous optical and electrical measurements. This advanced system enhances gas sensor research and development.
Area of Science:
- Materials Science
- Chemical Engineering
- Sensor Technology
Background:
- Gas sensing performance characterization systems are crucial for developing new gas sensing materials and devices.
- Existing automated systems face limitations in gas concentration and pressure control accuracy, and simultaneous multi-signal detection.
Purpose of the Study:
- To develop a high-precision gas sensing material characterization system.
- To enable precise, simultaneous measurement of electrical and optical sensor responses.
- To improve accuracy in gas concentration, pressure control, and response time determination.
Main Methods:
- Implementation of vacuum technology for enhanced gas control.
- Development of a vacuum-assisted gas-exchanging mechanism.
- Integration of multiple optical signal measurement setups for performance comparison.
- Simultaneous detection of optical and electrical responses under controlled conditions.
Main Results:
- Gas concentration control accuracy improved over 1600 times compared to existing systems.
- Precise control of ambient pressure from vacuum to 1.2 bar.
- Accurate determination of sensor response times.
- Performance comparison of three optical measurement setups, defining their application scopes.
- Demonstrated simultaneous detection of optical and electrical responses.
Conclusions:
- The developed system offers superior precision and simultaneous measurement capabilities for gas sensing research.
- Vacuum technology is key to achieving significant improvements in characterization accuracy.
- The system facilitates comprehensive performance evaluation (sensitivity, selectivity, stability) and optical/electrical response analysis.
