DFRobot Gravity Analogue Capacitive Soil Moisture Sensor

The DFRobot Gravity Analogue Capacitive Soil Moisture Sensor provides capacitive soil moisture sensing with a 3.3 to 5.5V DC operating voltage for smart gardening and agricultural projects.

Unlike traditional resistive sensors, it uses capacitive sensing technology, which avoids electrode corrosion and supports a longer service life. Its corrosion-resistant construction allows it to be buried in soil for prolonged periods, making it suited to long-term, embedded installations in IoT applications where consistent, real-time soil moisture data is required.

Key Features

• Plug-and-play design with a 3-pin Gravity interface
• Analogue output signal between 1.2 and 2.5V, corresponding directly to the detected moisture content
• Compatible with Arduino IO expansion shields and similar microcontroller platforms
• Capacitive measurement (non-resistive) for corrosion-resistant operation

Applications

This sensor suits automated plant watering systems, environmental monitoring stations and educational experiments in electronics and horticulture. It is a fundamental component for developers and hobbyists building smart garden solutions within the Internet of Things (IoT) ecosystem.

Please Note

For use with a Raspberry Pi, an external Analogue-to-Digital Converter (ADC) is required to interpret the sensor's output signal.

Specifications

• Operating Voltage: 3.3 - 5.5V DC
• Output Signal: 1.2 - 2.5V
• Interface: Analogue output via 3-pin Gravity connector
• Dimensions (Width x Depth x Height): 3.3 x 1.5 x 4.3
• Weight: 12 gm

Choose the DFRobot Gravity Analogue Capacitive Soil Moisture Sensor for monitoring soil hydration levels in smart gardening, agricultural and IoT projects.