Soil Moisture Sensor

The Soil Moisture Sensor is a simple breakout for measuring the moisture in the soil and similar materials. The soil moisture sensor is pretty straightforward to use. The two large, exposed pads function as probes for the sensor, together acting as a variable resistor. The more water that is in the soil means the better the conductivity between the pads will be and will result in lower resistance, and a higher SIG out. To get the Soil Moisture Sensor functioning all you will need is to connect the VCC and GND pins to your Arduino-based device (or compatible development board) and you will receive a SIG out which will depend on the amount of water in the soil.

Specifications: Soil Moisture Sensor

• Operating voltage: 3.3V~5V
• Dual output mode, analog output more accurate
• A fixed bolt hole for easy installation
• With power indicator (red) and digital switching output indicator (green)
• DO: digital output interface(0 and 1)
• Panel PCB Dimension: Approx.3cm x 1.5cm
• AO: analog output interface

Features

• Simple to use
• Passive component
• Resistive Sensor
• Water flow sensors are energy-efficient, making them ideal for solar-powered or battery-operated systems.
• Water flow sensors are designed for easy installation, with options including inline, clamp-on, or insert-type configurations depending on the application.

Working

• The soil moisture sensor operates in a straightforward manner.
• The fork-shaped probe with two exposed conductors acts as a variable resistor (similar to a potentiometer) whose resistance varies with the soil’s moisture content.
• This resistance varies inversely with soil moisture.
• The sensor produces an output voltage according to the resistance, which by measuring we can determine the soil moisture level.