Soil Moisture Sensor Modules for Arduino – 5 or 10 Sets

Give your electronics project a soil-moisture input for a plant pot or test bed. These probe-and-module sets provide analogue and digital outputs for compatible Arduino or microcontroller circuits. They are for hobbyists building their own monitoring or watering controls.

• ✅ Read moisture in your own project — Connect the analogue output to a suitable microcontroller input for your programmed checks.
• ✅ Set a switching threshold — Adjust the onboard potentiometer to choose the digital output's changeover point.
• ✅ Place the probe away from the board — Separate probe and interface sections connect with the supplied leads.
• ✅ Build several monitoring points — Choose five or ten sets for multiple pots or prototypes.
• ✅ Check the circuit during setup — Power and output indicators give a visible reference on the interface board.

Add soil input to a custom monitoring circuit

The two-prong probe connects to the interface module, which provides both AO and DO outputs. Use the analogue output for your own readings or the digital output for a threshold-based input.

The module is a component for a larger circuit, not a complete watering system. A controller, suitable power supply and any pump or relay must be added separately.

Choose five or ten probe-and-board sets. Connect using the marked supply and signal pins, and calibrate the project to your soil and application rather than assuming a universal moisture percentage.

Choose five or ten probe-and-module sets.

The ten-set option suits several monitoring points.

The five-set option provides a smaller project pack.

The probe connects separately to its interface board.

Check the board and probe dimensions against your prototype.

Connection leads join the probe and interface.

Marked pins identify the supply and output connections.

Technical details

• Product: soil-moisture probe and interface sets
• Pack options: 5 or 10 sets
• Supply voltage: 3.3–5 V
• Outputs: AO analogue and DO digital
• Comparator: LM393
• Threshold adjustment: onboard potentiometer
• Interface board: approximately 30 × 16 mm
• Connections: VCC, GND, DO and AO
• Package: selected number of probes, modules and connection leads
• Exclusions: microcontroller, supply, pump and relay not included

Choose your pack size and add soil-moisture input to your next electronics build.

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