Key benefits Accurate, long-lasting soil moisture sensing: uses capacitive measurement (not resistive) to reduce corrosion and provide more stable readings over time. Simple integration: 3-pin Gravity analog interface plugs directly into DFRobot Gravity I/O Expansion Shield for fast setup. Wide operating range: built-in voltage regulator supports 3.3–5.5 V systems so it works with common microcontrollers and development boards. What it does and why you need it This black capacitive analogue soil moisture sensor measures soil moisture content by detecting changes in capacitance, giving reliable, repeatable results without the rapid degradation typical of resistive probes. Insert it into the soil to get real-time moisture data for irrigation control, plant health monitoring, or data-logging projects. Key features Capacitive analogue sensing for corrosion resistance and stable readings Corrosion-resistant material and compact design for long service life Built-in voltage regulator: compatible with 3.3–5.5 V supply 3-pin DFRobot Gravity interface: plug-and-play connection with Gravity modules and shields Suitable for direct connection to Gravity I/O Expansion Shield Practical applications Home and office plants: automate watering routines based on real soil moisture readings to prevent over- or under-watering. Greenhouse or small-scale agriculture: monitor soil conditions across multiple pots or beds and trigger irrigation or alarms. Education and prototyping: quick-to-connect sensor for Arduino, Raspberry Pi (with ADC), and other maker projects using the Gravity ecosystem. Compatibility and performance notes Analog output for use with analog inputs on microcontrollers or analog-to-digital converters; designed for use with DFRobot Gravity systems. Compact, corrosion-resistant construction improves longevity compared with resistive probes. Important information Please allow a manual-measurement tolerance of 1–3 mm. Verify this tolerance before purchase if it matters for your installation. Product color may vary slightly from images due to differences between monitors.