Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	3.3V - 5V DC
Output Signal	Digital Switch Output (0 and 1)
Detection Area	Approx. 2cm x 4cm
Interface Type	3-Pin PH2.0 Connector
Material	FR-4 PCB with Gold Plated Probes
Adjustability	Sensitivity adjustable via potentiometer
Compatible Platforms	Arduino, Raspberry Pi, ESP32, STM32
Working Current	< 20mA
Dimensions	60mm x 20mm x 8mm
Application	Smart Gardening, Automatic Watering Systems

6 reviews

Anonymous

Mar 23, 2026

Rating: 5/5

Easy to interface

The digital output makes coding very simple. No complex libraries needed, just a basic digital read. Works perfectly with 5V logic levels.

Anonymous

Mar 17, 2026

Rating: 5/5

Great for beginners

As someone new to sensors, this was very easy to set up. Plenty of tutorials online match this specific module. Very happy with the purchase.

Anonymous

Mar 11, 2026

Rating: 5/5

Saved my indoor garden

I integrated this into a smart car kit style robot that moves between pots. It accurately detects dry soil and triggers the pump immediately. Highly recommended!

Anonymous

Mar 04, 2026

Rating: 5/5

Perfect for my Arduino project

This sensor works flawlessly with my automatic watering setup. The sensitivity adjustment is very responsive, allowing me to calibrate it exactly for my potting soil type.

Anonymous

Mar 02, 2026

Rating: 4/5

Solid performance

Does exactly what it says on the tin. The build quality is decent for a hobby component. I bought three for different zones in my greenhouse.

Anonymous

Mar 02, 2026

Rating: 4/5

Good value but probes need care

Great little module for the price. Just remember to wipe the probes clean after every use to prevent corrosion over time. Otherwise, readings are consistent.

5 FAQ

Q: What is the expected lifespan of the probes?

A: With proper cleaning after use and avoiding constant immersion in water, the gold-plated probes can last for several years. Corrosion may occur if left in wet soil indefinitely.

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

A: Yes, the module operates within a 3.3V to 5V range, making it fully compatible with 3.3V systems like the ESP32 or Raspberry Pi.

Q: How do I adjust the sensitivity threshold?

A: There is a blue potentiometer on the back of the PCB. Turn it clockwise to increase sensitivity or counter-clockwise to decrease it while monitoring the LED indicator.

Q: Is this sensor waterproof?

A: The electronic components are not waterproof. Only the metal probes are designed to be inserted into the soil. Please keep the PCB dry.

Q: Does this provide an analog moisture level reading?

A: This specific model provides a digital switch output (High/Low). If you need continuous analog values, please check our ASR series sensors.

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