Here is a tested Arduino project that uses 3 sensor probes as water level indicator with 3 leds and one LCD display + a simple controller that turns on a motor when the water has reached the desired ...

It will also prepare the user on how to successfully hook the Velostat up to an Arduino and how to code for it. This module can be used from K-6. Materials not included in Arduino kit: Velostat ; ...

It runs on an Arduino MEGA 2560 PRO (or similar microcontroller) and supports a wide array of additional hardware including pressure transducer, water level sensor, flow meter, OLED display, and more.