Description
Reviews
| 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 |
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.
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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