Development of an underwater depth and temperature measuring device

Abstract

Electronic measurement instruments are used to measure, process and record the massive quantitative data. Precise quantitative data obtained through sampling could generate useful environment models of water bodies such as lake and sea. The technological ability of system control is largely based on the quality of the adopted models and the data fed into them: both the models and the data depend on measurements. A wide range of commercial instrument is available to measure underwater temperature and depth. The instruments are expensive to maintain and purchase. A simple measuring device was developed locally to test the feasibility of measuring underwater depth and temperature. Underwater depth is not measurable in the measuring device developed because of a fast varying output signal, while temperature is measurable at a range from 10 °C to 35 °C with an accuracy of ±3 °C at room temperature.