Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Sensor Type	Capacitive
Operating Voltage	3.3V - 5.0V DC
Output Signal	Analog (AO) and Digital (DO)
Material	Nickel-plated Gold PCB
Corrosion Resistance	High (Long-term use)
Detection Depth	Up to 40mm
Compatibility	Arduino, Raspberry Pi, ESP32
Indicator LED	Power and Threshold Status
Adjustable Sensitivity	Yes, via Potentiometer
Package Includes	1x Sensor Module, 1x Gravity Connector

6 reviews

Anonymous

Mar 30, 2026

Rating: 5/5

Perfect for automation projects

Integrated this into my ESP32 based automatic watering system. The analog output is smooth and allows for precise moisture threshold setting. Highly recommended for IoT hobbyists.

Anonymous

Mar 23, 2026

Rating: 5/5

Reliable and durable

The build quality is excellent. The gold plating really does prevent oxidation. My indoor plants have never been happier since I automated their care with this sensor.

Anonymous

Mar 21, 2026

Rating: 5/5

Finally a sensor that doesn't rust!

I've tried resistive sensors before and they corroded within weeks. This capacitive module has been in my tomato planter for two months with no signs of degradation. The readings are stable and easy to calibrate.

Anonymous

Mar 11, 2026

Rating: 4/5

Great value, easy to wire

Works perfectly with my Arduino Uno. The gravity connector makes wiring foolproof. I deducted one star because the documentation could be more detailed on calibration steps, but online tutorials filled the gap.

Anonymous

Mar 07, 2026

Rating: 4/5

Good sensitivity range

The potentiometer allows you to fine-tune the digital output trigger easily. It reacts quickly to changes in soil moisture. Just make sure to waterproof your connections if using outdoors.

Anonymous

Mar 01, 2026

Rating: 5/5

Best upgrade for my garden kit

Replaced my old sensors with these. The difference in longevity is night and day. No more digging up rusty probes every season. Simple, effective, and affordable.

5 FAQ

Q: Does the package include the water pump for the automatic system?

A: No, this package contains only the soil moisture detection module. You will need to source a water pump and relay module separately to complete an automatic watering system.

Q: Is this compatible with 3.3V logic boards like ESP8266?

A: Yes, the module operates comfortably between 3.3V and 5.0V, making it fully compatible with ESP8266, ESP32, and standard 5V Arduinos.

Q: Can this sensor be used directly in salty soil?

A: While the capacitive design is corrosion-resistant, highly saline soil can affect reading accuracy. We recommend calibrating the sensor specifically for your soil type before deployment.

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

A: For best results, insert the sensor vertically until the prongs are fully submerged in the root zone, typically about 2/3rds of the probe length, avoiding the very bottom of the pot.

Q: What is the expected lifespan of the probe?

A: Due to the nickel-plated gold surface and capacitive technology, the probe is designed to last several years under normal conditions, significantly outperforming resistive sensors.

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