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Meng LI, Baolu DU, Jinjia GUO, Zhihao ZHANG, Zeyu LU, Rong'er ZHENG. A low-cost in-situ CO2 sensor based on a membrane and NDIR for long-term measurement in seawater[J]. Journal of Oceanology and Limnology, 2022, 40(3): 986-998

A low-cost in-situ CO2 sensor based on a membrane and NDIR for long-term measurement in seawater

Meng LI1, Baolu DU1, Jinjia GUO1, Zhihao ZHANG1, Zeyu LU2, Rong'er ZHENG1
1 College of Information Science and Engineering, Ocean University of China, Qingdao 266100, China;
2 R&D Center for Marine Instruments and Apparatuses, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266237, China
The multi-point simultaneous long-term measurement of CO2 concentration in seawater can provide more-valuable data for further understanding of the spatial and temporal distribution of CO2. Thus, the requirement for a low-cost sensor with high precision, low power consumption, and a small size is becoming urgent. In this work, an in-situ sensor for CO2 detection in seawater, based on a permeable membrane and non-dispersive infrared (NDIR) technology, is developed. The sensor has a small size (Ф 66 mm×124 mm), light weight (0.7 kg in air), low power consumption (<0.9 W), low cost (
Key words:    in-situ sensor    dissolved CO2    long-term measurement    permeable membrane    non-dispersive infrared (NDIR)    low-cost   
Received: 2021-04-17   Revised:
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