DFRobot Gravity Analogue Capacitive Soil Moisture Sensor

The DFRobot Gravity Analogue Capacitive Soil Moisture Sensor provides a highly accurate and reliable method for monitoring soil hydration levels, essential for smart gardening and agricultural projects. Unlike traditional resistive sensors, it utilises capacitive sensing technology, which prevents electrode corrosion and ensures a much longer service life. This makes it perfectly suited for long-term, embedded installations in IoT applications where consistent, real-time soil moisture data is critical.

Featuring a simple plug-and-play design with a 3-pin Gravity interface, it connects effortlessly to compatible microcontroller boards like those from Arduino. The sensor operates on a low voltage range of 3.3-5.5V DC and provides an analogue output signal between 1.2-2.5V, corresponding directly to the moisture content detected. Its compact and robust corrosion-resistant construction allows it to be buried in soil for prolonged periods without degradation.

Key Applications

This sensor is ideal for a wide array of projects, from automated plant watering systems and environmental monitoring stations to educational experiments in electronics and horticulture. It is a fundamental component for developers and hobbyists creating 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.

Core Features & Specifications

• Sensing Technology: Advanced capacitive measurement (non-resistive)
• Key Advantage: Corrosion-resistant materials for extended durability
• Interface: Analogue output via 3-pin Gravity connector
• Operating Voltage: 3.3 - 5.5V DC
• Output Signal: 1.2 - 2.5V
• Compatibility: Designed for use with Arduino IO expansion shields and similar platforms
• Dimensions: 43mm (H