DFRobot waterproof capacitive soil moisture sensor

This waterproof capacitive soil moisture sensor from DFRobot measures the moisture in the soil and thus shows when a plant needs watering. The probe is inserted into the soil and measures the capacitance of the soil there, which changes with the moisture. The sensor has an integrated amplifier and can be connected directly to an analog input, for example of an Arduino. Unlike a conventional soil moisture sensor, it has no wear from corrosion.

Note: The cut edges of the sensor are not sealed, so moisture can enter the circuit board through them. For a longer service life, seal the cut edges with clear varnish or epoxy resin.

Recommended Accessories:

• Micro Water Pump 120L/h 2.5-6V
• 1-Channel Relay Module

Features:

• Capacitive measuring principle
• Analog output 0 V to 2.9 V
• Operation with 3.3 V or 5 V
• 1.5 m cable with 2.54 mm plugs: red VCC, black GND, yellow signal, second black GND

Application Examples:

• Automatic watering of plants
• Monitoring of garden, raised bed and greenhouse

Documentation:

• DFRobot wiki with Arduino example
• Schematic (PDF)

Technical Data:

• Type: DFRobot SEN0308
• Operating voltage: 3.3 V to 5.5 V DC
• Analog output voltage: 0 V to 2.9 V DC
• Voltage regulator: XC6206P302
• Chip: TLC555CDR
• Connection: 2.54 mm plug 3-pin and 1-pin
• Cable length: 1.5 m
• Protection class: IP65 according to DFRobot
• Colour: black
• Dimensions: 175 × 30 × 14 mm
• Weight: 70 g

Scope of Delivery:

• 1× DFRobot waterproof capacitive soil moisture sensor
• 4× Waterproof label