He decided it was time to build his own solution to this problem. What he ended up with was a water level sensor made from PVC pipe and a few other components. The physical assembly is pretty simple.

Also covered is the M-Series MC420 analog output sensor,. MTS Systems Corp., Sensors Div., 3100 Sheldon Dr., Cary, NC 27513, (919) 677-0100, mtssensors.com \ ...

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 ...

Figure 1 shows the sensor setup. Two pairs of wires are mounted on a PVC pipe corresponding to water levels A and C. (These wires should be mounted with noncorrosive metal screws and ring connectors.) ...

Although simple in theory – an air bubble and conductive liquid sealed in a chamber surrounded by electrodes – electronic levels are more complex in practice. If the liquid is an electrolyte, it needs ...