Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	3.3V - 5V DC
Output Signal	Analog (AO) and Digital (DO)
Probe Length	60mm
PCB Dimensions	32mm x 14mm
Current Consumption	< 20mA
Interface Type	PH2.0-3P Connector
Material	Nickel-plated Copper & FR-4
Adjustable Sensitivity	Yes, via Potentiometer
Compatibility	Arduino, Raspberry Pi, ESP32
Application	Smart Gardening, Agriculture Monitoring

6 reviews

Anonymous

Mar 29, 2026

Rating: 5/5

Saved my indoor plants

I hooked this up to a simple alarm system to notify me when my ferns are dry. It's accurate and responsive. No more guessing games with watering schedules.

Anonymous

Mar 29, 2026

Rating: 5/5

Robust build quality

I've had these probes in the ground for three months now, and there is no visible corrosion on the nickel plating. Much better than the cheap bare copper ones I used before.

Anonymous

Mar 17, 2026

Rating: 3/5

Works but sensitive to placement

The sensor works as described, but I found the readings vary significantly if the probe isn't fully inserted or if there are air pockets near the tines. Make sure to pack the soil tight around it.

Anonymous

Mar 10, 2026

Rating: 4/5

Good value, needs calibration

Great little module for the price. You do need to spend some time calibrating the potentiometer to get the digital threshold right for your specific soil type, but once set, it's reliable.

Anonymous

Mar 08, 2026

Rating: 5/5

Perfect for my automated plant system

This sensor works flawlessly with my Arduino project. The analog reading is stable, and the separate probe design makes it easy to install in deep pots without exposing the electronics to water.

Anonymous

Mar 08, 2026

Rating: 4/5

Easy to integrate

Plug and play with standard microcontrollers. The documentation online is plentiful. Only giving 4 stars because the connector wire could be a bit longer for larger setups.

5 FAQ

Q: My digital output is always high/low regardless of soil wetness. How do I fix this?

A: You likely need to adjust the onboard potentiometer. Insert the probe into soil with your desired moisture threshold, then use a small screwdriver to turn the blue potentiometer until the LED indicator changes state. This sets the trigger point for the digital output.

Q: What is the maximum depth this probe can effectively measure?

A: The probe measures moisture along the entire length of its two prongs (approx. 60mm). It provides an average moisture level between the tines. It is not designed to measure moisture at specific distinct depths, only within the insertion zone.

Q: Does this module come with code examples for Raspberry Pi?

A: The package includes a link to a GitHub repository with example code for both Arduino (C++) and Raspberry Pi (Python). Since the Pi requires an ADC chip for analog reading, the Python examples show how to interface with an MCP3008.

Q: Can I connect multiple probes to a single Arduino board?

A: Yes, you can connect multiple sensors. Each sensor will need its own analog input pin if you want to read them simultaneously, or you can use a multiplexer if you are running low on pins. Ensure your power supply can handle the combined current draw.

Q: Is this sensor suitable for long-term burial in outdoor garden beds?

A: While the probe is nickel-plated for corrosion resistance, we recommend retrieving the module periodically for inspection if used outdoors long-term. For permanent outdoor installation, consider coating the PCB with conformal coating for extra protection against humidity.

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