A CMOS Seawater Salinity to Digital Converter for IoT Applications of Fish Farms

This paper proposes a complementary metal-oxide-semiconductor (CMOS) seawater-salinity-to-digital converter for Internet of Things (IoT) applications in fish farms. In contrast to previous studies, the proposed converter not only is suitable for processing seawater salinity but also has immunity to environmental low-frequency noise. Another innovation is that it can be easily delivered through transmission media before the IoT. The performance and functions of the proposed converter were successfully verified through measurements. The measured salinity range was 20-80 g/L, and the corresponding measured signal-to-noise-distortion ratio was 81.3-62.5 dB. The proposed converter is, therefore, suitable for IoT applications in salinity-monitoring devices.