A Low-Cost, Data-Logging Salinity Sensor

In this paper, we present the design, development and testing of a novel low-cost, data-logging salinity sensor. The sensor was designed keeping size, cost and functionality in mind. The sensor can be submersed in water for up to two weeks (all electronics are completely sealed) while salinity is recorded onboard at user-defined intervals. The data is then downloaded to a computer in the laboratory, after which the sensor is recharged, cleaned for biofouling and ready to be used again. Our initial laboratory testing shows the sensor prototype is functional and can be calibrated to compute conductivity, hence salinity, of ocean water.