Gravity: Analog Capacitive Soil Moisture Sensor

This sensor measures soil moisture levels by capacitive sensing, rather than resistive sensing like traditional moisture sensors. It is made of a corrosion-resistant material giving it long service life. Insert it into the soil and keep an eye on your plants with real-time soil moisture data!

The sensor includes an on-board voltage regulator which gives it an operating voltage range of 3.3-5.5V making it compatible with low-voltage development boards (both 3.3V and 5V logic). To make it compatible with a Raspberry Pi, an ADC converter is required.

This sensor is compatible with the DFRobot 3-pin Gravity interface, which means it can be directly connected to the Gravity I/O Expansion Shield.

The following image shows an example project – a device that notifies you when a plant needs to be watered:

Connection Example – Arduino

Features

• Corrosion resistant
• Supports Gravity 3-Pin Interface
• Analog Output

Specifications

• Operating Voltage: 3.3 ~ 5.5 VDC
• Output Voltage: 1.2 ~ 2.5V
• Interface: PH2.0-3P
• Dimension: 98mm x 23mm
• Weight: 15g

Resources

• Product Wiki

Package Contents

• 1x Capacitive Soil Moisture Sensor
• 1x Analog Sensor Cable