Some prebuilt sensor modules had some issues because of the 5V supply. In the end, he used a new sensor, a microcontroller, and then used the pump and valve from the blood pressure cuff.

In the water level sensor schematic, the common probes connecting the underground tank and the overhead tank to +9V supply are marked ‘C’. The other probe in underground tank, which is slightly above ...

In the loop () we check to see if the water level has reached any sensor and if so then turn an the corresponding led. We also use the LCD to display HIGH if the water has reached the highest poing, ...

The most common units measure level changes from 0 to 2, 12, or 20 in. (50, 300, or 500 mm) with the shorter lengths providing greatest sensitivity. As water level changes, the float moves up or ...

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 ...

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.

SeeLevel gauges are now being installed by many RV manufacturers into their high-end RVs. But the system is an easy retrofit installation into an RV equipped with internal tank sensors. A large ...