A water pump controller and level indicator (EWPCLI) was designed, built, and tested. The EWPCLI uses the electrical conductivity of water to calculate the water level in a storage tank and to automatically operate the water pump. The EWPCLI uses metallic conductors, or probes, placed at various points along the tank's height to serve as sensors. Utilizing the high conductivity of ionized water due to its impurities, comparators detect the presence of water at the wires and provide corresponding digital outputs used by the microcontroller to drive a digital result that activates a visual display LED that shows different water levels in the tank. The microprocessor also manages a switch that turns on or off the water pump when the water level drops below the predetermined minimum (when water goes above the chosen maximum level). In active mode, EWPCLI activates the water pump based on the tank's water level. Additionally turned on at the relevant water level is the necessary visible LED. The technology will help to increase the performance and lifespan of the electric water pump while reducing the expense and inefficiency of human involvement involved in monitoring and managing the pump.

microcontroller, comparator, LED display, and EWPCLI