Capacitive Soil Moisture Sensor V2.0 – Corrosion-Resistant Analog Probe
Capacitive Soil Moisture Sensor V2.0 – Corrosion-Resistant Analog Output
The Capacitive Soil Moisture Sensor V2.0 measures soil moisture by detecting changes in capacitance, not resistance, making it resistant to corrosion. It outputs an analog voltage that corresponds to the moisture level, suitable for microcontrollers with ADC inputs. This sensor is ideal for automated irrigation, plant monitoring, and smart agriculture projects.
Key Specifications
| Specification | Value |
|---|---|
| Operating Voltage | 3.3V – 5.5V DC |
| Output Signal | Analog (0V – 3.0V at 3.3V supply) |
| Sensor Type | Capacitive (non-corrosive) |
| Interface | 3-pin header (VCC, GND, AOUT) |
| Dimensions | 98mm × 23mm × 6mm |
| Weight | 15g |
What You Can Build With This
- Automatic plant watering system with Arduino and pump
- Soil moisture monitoring dashboard with ESP32 and Blynk
- Smart garden with Raspberry Pi and relay control
- Low-power wireless sensor node for agriculture
Compatibility
This sensor works with any microcontroller that supports analog input, such as Arduino Uno, Nano, Mega, ESP32, ESP8266, and STM32 boards. For Raspberry Pi, pair it with an external ADC like the MCP3008. It operates at both 3.3V and 5V logic levels, with no level shifting required.
Wiring Notes
Connect VCC to 3.3V or 5V, GND to ground, and AOUT to an analog input pin. For Raspberry Pi, use an MCP3008 ADC and connect the sensor output to one of its analog channels. No pull-up resistor is needed; the analog signal directly corresponds to moisture.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino?
Yes, connect AOUT to any analog pin (A0-A5 on Uno) and read the voltage using analogRead(). The sensor provides an output voltage proportional to moisture.
Can this sensor be left in soil permanently?
Its capacitive design resists corrosion, but avoid submersion in water. For long-term deployment, protect the electronics with conformal coating and ensure the PCB edge is not continuously wet.
How accurate is the moisture reading?
The sensor provides a relative measurement; the analog value varies from dry (low) to wet (high). For absolute accuracy, calibrate by taking readings in completely dry and saturated soil, then map the range in your code.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items