As the top sensor goes low (water above level C), the CLR signal is activated and the output of the flipflop is low. This allows Q1 to turn on and activate a triac or relay for the pump.

25 thoughts on “ Wireless Water Level Sensor From PVC Pipe ” lovebes says: February 13, 2015 at 7:52 pm I thought I saw a ultrasound based one for Keurig coffee machines a while back? Report ...

By analyzing those patterns, an onboard Raspberry Pi microcomputer is able to determine the current water level to within an accuracy of plus or minus ~1.5 cm (0.6 in). That data is transmitted to ...

Researchers from the Virginia Institute of Marine Science, city officials and various organizations are working together to improve how they gather information about water levels in some of the ...