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Home / Computer Hardware, Monitors & Peripherals / 3.3V-5V (4-Wire) Soil Moisture Sensor Module - Probe for Automatic Watering and Plant Irrigation Systems

Attributes

Brand -
Category Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin -
Operating Voltage 3.3V - 5V DC
Output Signal Digital Switch Output (0 and 1)
Probe Length 60mm
Connector Type 4-Pin PH2.0 Interface
PCB Dimensions 32mm x 14mm
Operating Current ≤20mA
Operating Temperature -10°C to 50°C
Probe Material Nickel-plated Copper
Compatibility Arduino, Raspberry Pi, ESP32, STM32
Package Weight 10g

5 reviews

A

Anonymous

Mar 31, 2026

Rating: 4/5

Good sensor, needs tuning

Value for money is great. Had to adjust the threshold a few times to get accurate readings for my specific soil type.

A

Anonymous

Mar 28, 2026

Rating: 5/5

Great starter sensor

Very beginner-friendly. The 4-wire setup is clear and documentation online is helpful. Got it working in minutes.

A

Anonymous

Mar 27, 2026

Rating: 3/5

Works but corrodes

Functionality is fine, but the probes show signs of rust after being left in soil for too long. Consider coating them.

A

Anonymous

Feb 12, 2026

Rating: 5/5

Perfect for my Arduino project

Works exactly as described. Easy to calibrate the sensitivity potentiometer on the board. My plants are much happier now.

A

Anonymous

Feb 02, 2026

Rating: 5/5

Reliable for automation

Integrated this into my drip system. No issues so far after 2 months of continuous use. Highly recommend for DIY setups.

5 FAQ

Q: Do I need a specific Arduino library?

A: No specific library is needed. You can simply read the digital pin state using standard digitalRead functions.

Q: Does it output analog values?

A: This module provides a digital switch output. For analog readings, please check our capacitive sensor series.

Q: How far apart are the probe pins?

A: The spacing between the probe pins is standard at approximately 15mm apart.

Q: Can I use this with 3.3V logic boards?

A: Yes, it supports 3.3V to 5V input voltage, so it is compatible with 3.3V logic boards.

Q: Is the probe waterproof?

A: The probe is water-resistant for soil insertion, but the PCB board should not be submerged in water.

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