MOISTURE SENSOR

Description

Soil Moisture Sensor with Interface Module

A simple water sensor that can be used to detect soil moisture.

• When the soil moisture module detects low moisture it outputs a high level.
• Sense level adjustable with small potentiometer.
• It has both analog and digital outputs using a LM393 comparator chip.
• Operating voltage 3.3V-5V
• power indicator (red) and digital output indicator (green)

The module is basically testing resistance between the input terminals. It can be used for sensing soil moisture, or can be a ‘raindrop’ detector if you make many close-together wires on an insulator.

Long-term stability as soil sensor will be better with two stainless steel probes such as cooking skewers etc.