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

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 (Þ 66 mm×124 mm), light weight (0.7 kg in air), low power consumption (<0.9 W), low cost (更多