Soil Moisture Sensor

Regular price LE 75.00


The fork-shaped probe with two exposed conductors, acts as a variable resistor (just like a potentiometer) whose resistance varies according to the water content in the soil.

This resistance is inversely proportional to the soil moisture:

  • The more water in the soil means better conductivity and will result in a lower resistance.
  • The less water in the soil means poor conductivity and will result in a higher resistance.

The sensor produces an output voltage according to the resistance, which by measuring we can determine the moisture level.



  • Operating Voltage: 3.3V to 5V DC
  • Operating Current: 15mA
  • Output Digital - 0V to 5V, Adjustable trigger level from preset
  • Output Analog - 0V to 5V based on infrared radiation from fire flame falling on the sensor
  • LM393 based design
  • Easy to use with Microcontrollers or even with normal Digital/Analog IC



  • Optimise soil moisture for optimum plant growth.
  • Accurate irrigation decicions.
  • Demonstrate environmental management.
  • Saving water and energy.