Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Brand	DFRobot
Sensor Type	Capacitive
Operating Voltage	3.3V - 5.5V DC
Output Signal	Analog Voltage
Material	Corrosion Resistant Nickel-Plated Copper
Interface	PH2.0-3Pin Connector
Dimensions	60mm x 20mm x 4.8mm
Compatibility	Arduino, Raspberry Pi, ESP32
Lifespan	Extended (vs. Resistive Sensors)
Application	Soil Moisture Detection for Gardening

6 reviews

Anonymous

Mar 18, 2026

Rating: 5/5

Easy to use with Arduino

As a beginner, I was worried about wiring this up, but the PH2.0 connector made it plug-and-play with my gravity shield. The example code on the wiki got me reading values in minutes.

Anonymous

Mar 13, 2026

Rating: 4/5

Great durability, needs calibration

The build quality is excellent and the corrosion resistance is real. However, you do need to calibrate it yourself for your specific soil type to get accurate percentage values. Once calibrated, it works perfectly with my ESP32 setup.

Anonymous

Mar 07, 2026

Rating: 5/5

Best value capacitive sensor

Compared to other brands, this offers the best balance of price and durability. The nickel plating really makes a difference in humid environments. My data logging has been uninterrupted for weeks.

Anonymous

Mar 04, 2026

Rating: 5/5

Perfect for automated irrigation

Integrated this into my smart garden system. The analog output is smooth, and unlike older models, I don't have to replace the probe every season. Highly recommended for any long-term outdoor project.

Anonymous

Mar 02, 2026

Rating: 5/5

Finally, a sensor that doesn't rust!

I've gone through three resistive sensors in the last year because they corroded within weeks. This capacitive model from DFRobot has been in my tomato planter for two months now with zero signs of degradation. The readings are stable and consistent.

Anonymous

Mar 01, 2026

Rating: 4/5

Solid performance

Works exactly as described. It detects the difference between dry and wet soil very quickly. I took off one star only because the cable could be a bit longer for larger raised beds, but an extension wire solved that.

5 FAQ

Q: Does the package include cables or just the module?

A: The package includes the sensor module and one Gravity analog cable (PH2.0-3Pin to Dupont) for easy connection to mainboards. No additional soldering is required for standard setups.

Q: What is the response time for moisture changes?

A: The sensor provides real-time analog voltage output. Changes in soil moisture are reflected almost instantly (within milliseconds), though we recommend averaging multiple readings in your code to filter out noise.

Q: How does this compare to the old resistive sensors?

A: Unlike resistive sensors that pass current through the soil (causing electrolysis and rapid corrosion), this capacitive sensor measures dielectric permittivity without exposing electrodes to the soil directly. This significantly extends the lifespan of the probe.

Q: Is this sensor waterproof for direct burial in soil?

A: Yes, the probe is designed to be buried directly in soil. The capacitive sensing area is coated to prevent corrosion and short circuits from moisture. However, the electronic components at the top should not be submerged in water.

Q: Can I connect this directly to a 3.3V microcontroller like an ESP8266?

A: Absolutely. The sensor operates within a voltage range of 3.3V to 5.5V, making it fully compatible with 3.3V logic systems like the ESP8266 and ESP32 without needing a level shifter.

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