Capacitive Soil Moisture Sensor Module

The Capacitive Soil Moisture Sensor measures soil moisture levels using capacitive sensing instead of direct electrical conduction. This design prevents corrosion of the sensor probe and significantly increases its lifespan compared to traditional resistive soil moisture sensors. When inserted into the soil, the sensor detects changes in capacitance caused by the water content in the soil. The module then converts this change into an analog voltage output, which can be read by a microcontroller’s analog input pin. Because of its durability and accuracy, this sensor is commonly used in automatic irrigation systems, smart agriculture projects, greenhouse monitoring systems, and plant watering automation. Key Features Uses capacitive sensing technology for accurate readings Corrosion-resistant design (longer lifespan than resistive sensors) Provides analog output proportional to soil moisture Low power consumption Easy interface with Arduino and other microcontrollers Ideal for smart farming and automated irrigation projects Technical Specifications Parameter Value Operating Voltage 3.3V – 5.5V Output Type Analog Interface 3-Pin Sensor Type Capacitive Operating Current < 5 mA Pin Configuration Pin Description VCC Power Supply (3.3V – 5V) GND Ground AOUT Analog Output What’s in the Box 1 × Capacitive Soil Moisture Sensor Module