This story is from February 16, 2018 Ultrasonic sensor to check level of water in dams Jisha Surya / TNN / Updated: Feb 16, 2018, 00:11 IST AA Follow us ...

A low-cost (~$100), do-it-yourself (DIY) ultrasonic water level sensor/datalogger has been designed, constructed, and tested for use in education, citizen/community science, and research settings. The ...