Water Level Detection Sensor

Water Level Detection Sensor works on the basic principle of conduction through the water. It can be used for water level detection, rainfall detection, water leakage detection, etc. The sensor has been divided into two parts, a sensing module also known as brick and a circuit module.

Working Principle of Water Level Detection Sensor:

The sensor works on the basic principle of conduction. The sensing bricks have independent conducting lines connected to a weak pull-up resistor. The tracks are connected to the power source and are tested for the shorted network. As soon as a water droplet falls on tracks of the brick, they get shorted and the same is detected using the circuit. In analog mode, larger the amount of liquid,  more will be the voltage produced at the output and hence, the same is observed and can be used to detect the level of water in an overhead tank by either using multiple sensors or by increasing the length of the tracks (by soldering conducting wires through them). This item has low power consumption, and high sensitivity, which are the biggest characteristics of this module.


  • Water level control
  • Precision level detection
  • Submersible marine low-level indication
  • Monitoring surface water.


  • Working voltage: 5V
  • Working Current: <20ma
  • Interface: Analog
  • Width of detection: 40mm×16mm
  • Working Temperature: 10°C~30°C
  • Arduino compatible interface
  • Low power consumption
  • High sensitivity
  • Output voltage signal: 0~4.2V

Pin Description:

Pin Name Description
5V (+) Supply Voltage (3.5V – 6V)
GND (-) Ground (0V)
SGN Signal (Can be used as both Digital and Analog


Inspired From:

Nowadays water level is depleting in the major village in India to stop it from depleting we need to have the sensor which can show us the water level at different places so that we can conserve and stop it from depleting.

Link to Example Projects: