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This capacitive soil moisture sensor measures moisture through capacitive sensing rather than the resistive method used by cheaper soil sensors, which is the key difference that makes it more durable for long-term outdoor or in-soil use. Resistive sensors pass current directly through the soil between two exposed metal probes, which corrodes those probes over weeks or months of contact with damp soil; a capacitive sensor instead measures the soil's dielectric properties without that same direct current path, avoiding the corrosion problem.
The sensor's construction uses corrosion-resistant materials specifically to extend its working life when left buried or in continuous soil contact, which matters for anything left running in a garden bed or plant pot over an extended period.
An onboard voltage regulator lets it work directly with both 3.3V and 5V systems, simplifying integration with a range of microcontroller platforms. Operating voltage is 3.3 to 5.5VDC, output voltage ranges from 0 to 3.0VDC as an analog signal, and operating current is a modest 5mA. It uses a PH2.54-3P interface, matching the Gravity 3-Pin Sensor interface standard supported by a number of common sensor and breakout ecosystems.
For use with a Raspberry Pi specifically, an ADC converter is needed, since Raspberry Pi boards lack a built-in analog-to-digital converter on their GPIO pins, unlike most Arduino-class boards.
Gardeners, hobbyist farmers and anyone building an automated plant-watering or intelligent agriculture project will find this capacitive sensor a more durable choice than a resistive soil probe for anything left in the ground long-term.
Capacitive sensing avoids the corrosion that resistive probes suffer from constant contact with damp soil.
3.3 to 5.5VDC.
An analog voltage between 0 and 3.0VDC, corresponding to moisture level.
Yes, but a Raspberry Pi requires an external ADC converter since it lacks a built-in analog input.
A PH2.54-3P connector, matching the Gravity 3-Pin Sensor interface standard.
| Brand | Generic |
|---|---|
| Sensor Type | Capacitive |
| Selling unit | PCS |
