Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Sensor Type	Capacitive
Operating Voltage	3.3V - 5V DC
Output Signal	Analog (AO) and Digital (DO)
Material	Nickel-plated Copper
Corrosion Resistance	High (Long-term use)
PCB Size	60mm x 20mm
Adjustable Sensitivity	Yes, via Potentiometer
Compatibility	Arduino, Raspberry Pi, ESP32
Application	Smart Gardening, Automatic Watering
Package Includes	1x Sensor Module, 1x Connector Cable

6 reviews

Anonymous

Mar 20, 2026

Rating: 4/5

Accurate moisture detection

Very sensitive to changes in soil moisture. I noticed it reacts quickly when I water my succulents. Just make sure to bury it deep enough to get an average reading of the root zone.

Anonymous

Mar 16, 2026

Rating: 4/5

Great value, easy to calibrate

Works exactly as described. The potentiometer makes it very easy to set the threshold for the digital output. Only giving 4 stars because the included wires are a bit short for my setup, but otherwise excellent.

Anonymous

Mar 13, 2026

Rating: 5/5

Finally, a sensor that doesn't rust!

I switched from resistive sensors to this capacitive one, and the difference is night and day. After three months in the soil, there is zero corrosion. The readings are stable and perfect for my automated tomato garden.

Anonymous

Mar 11, 2026

Rating: 5/5

Durable and consistent

We use these in our community garden automation system. They have withstood rain, direct sun, and varying soil types without drifting in calibration. Excellent build quality for the price.

Anonymous

Mar 04, 2026

Rating: 5/5

Reliable for student projects

Bought a batch for our high school robotics club. Students find them easy to interface with, and they survive being buried in dirt repeatedly. No failures so far after a semester of use.

Anonymous

Mar 02, 2026

Rating: 5/5

Perfect for smart home projects

Integrated this with an ESP32 and Home Assistant. The analog output provides granular data which helps me water my plants only when necessary. Highly recommended for any IoT gardening kit.

5 FAQ

Q: Is the digital output pin necessary if I am reading the analog value?

A: No, the digital output (DO) is optional. It acts as a simple switch based on your potentiometer threshold. If you are reading precise moisture levels via the analog pin (AO), you do not need to connect the DO pin.

Q: Can this sensor be used directly with a 3.3V microcontroller like the ESP8266?

A: Yes, this module operates comfortably within the 3.3V to 5V range, making it fully compatible with ESP8266, ESP32, and standard 5V Arduino boards.

Q: Does this come with code examples for Arduino?

A: While the package includes the hardware, you can find numerous open-source code examples and libraries on GitHub and the Arduino IDE example finder by searching for 'capacitive soil moisture sensor'.

Q: How deep should I insert the sensor into the soil?

A: For best results, insert the sensor vertically so that the entire nickel-plated sensing area is submerged in the soil, typically about 4-5 cm deep, avoiding contact with rocks or pot bottoms.

Q: Will this sensor work in hydroponic setups?

A: This sensor is designed specifically for measuring moisture in soil or substrate. It is not recommended for full submersion in liquid water or hydroponic solutions as it may affect the calibration and longevity.

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