FC-28 Soil Moisture Sensor Module

Push the two-pronged probe into the soil and the FC-28 reports how wet it is: an analog voltage for precise readings and a digital output that flips at a threshold you set with the potentiometer. Combine it with a relay and a small pump to build an automatic plant-watering system for gardens, nurseries or farms.

Key features

• Analog output for moisture level + adjustable digital threshold
• LM393 comparator board with power and output LEDs
• Works with 3.3 V and 5 V microcontrollers
• Probe and control board connected by cable

Specifications

What's in the box

• 1 × soil probe
• 1 × comparator module
• 1 × connecting cable

Ideal for

• Automatic plant watering
• Smart farming demos
• School science projects

Good to know

• Power the probe only when taking a reading (switch VCC from a GPIO) to slow electrode corrosion.