Soil Moisture & Water SensorsCompatible
Soil Moisture Sensor with Probe
Two-piece soil moisture sensor: a fork-shaped probe and an LM393 comparator board with analog and digital outputs. The classic sensor for automatic plant-watering projects.
- Sensing Method
- Resistive (two electrodes)
- Comparator
- LM393
- Supply Voltage
- 3.3–5 V
- Outputs
- Analog (AO) + digital (DO, adjustable)
- Probe Size
- 60 × 20 mm
- Board Size
- 30 × 16 mm
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Specifications
- Manufacturer Part Number
- YL-69
- Sensing Method
- Resistive (two electrodes)
- Comparator
- LM393
- Supply Voltage
- 3.3–5 V
- Outputs
- Analog (AO) + digital (DO, adjustable)
- Probe Size
- 60 × 20 mm
- Board Size
- 30 × 16 mm
- Pins
- VCC, GND, DO, AO
Downloads
Description
Push the fork into the soil and the sensor measures how well the soil conducts – wet soil conducts more. The comparator board gives an analog reading for exact levels and a digital output that switches at a threshold you set with the trimpot.
Features
- Probe with two exposed electrodes, connected by a 2-pin cable
- Analog output (AO) – higher value means drier soil
- Digital output (DO) with adjustable threshold and LED
- 3.3–5 V supply
Tip for a longer life
Resistive probes corrode if powered all the time. Power the sensor from a GPIO pin and switch it on only for a reading (e.g. once every few minutes) – the probe will last many times longer.
Package includes
1 × soil probe, 1 × comparator board, 1 × 2-wire connecting cable