Capacitive Soil Moisture Sensor v2.0 (HW-390)
Capacitive Soil Moisture Sensor v2.0 (HW-390) - Image 2
Capacitive Soil Moisture Sensor v2.0 (HW-390) - Image 3

Capacitive Soil Moisture Sensor v2.0 (HW-390)

₹55.00

Overview

The image depicts a Capacitive Soil Moisture Sensor v2.0 (specifically model HW-390). Unlike traditional resistive soil moisture sensors, which suffer from rapid corrosion due to direct electrical contact with soil, this capacitive sensor measures soil moisture content through changes in dielectric permittivity, avoiding exposed electrodes. It features an integrated voltage regulator (often TL431 or NE555-based circuitry) and delivers an analog voltage output corresponding to soil moisture level.

  • Corrosion-Resistant Design: Embedded inside non-conductive PCB trace layers, preventing oxidation in wet soil.
  • Analog Output: Delivers an analog voltage signal (AUOT/AOUT) directly proportional to soil capacitance.
  • Wide Compatibility: Works seamlessly with 3.3V and 5V microcontrollers like Arduino, ESP32, ESP8266, and Raspberry Pi.
  • Integrated Regulator: On-board chip provides stable operation across varying supply voltages.
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Description

Key Specifications

Parameter Specification / Value
Model / Revision Soil Sensor v2.0 / HW-390
Operating Voltage (VCC) 3.3V – 5.5V DC
Output Voltage Signal (AOUT) 0.0V – 3.0V DC (approx. analog signal)
Measurement Principle Capacitive Sensing (Dielectric permittivity of soil)
Interface / Pinout 3-Pin JST Connector (GND, VCC, AUOT)
PCB Dimensions approx. 98mm x 23mm
Sensor Material FR4 PCB with anti-corrosion protective mask

Pinout Configuration

  • GND: Ground connection (Connect to 0V / GND)
  • VCC: Power supply voltage (3.3V to 5V)
  • AUOT / AOUT: Analog signal output (Connect to ADC pin of MCU)

Applications and Uses

  • Smart Agriculture & Automated Irrigation: Used in automated farming systems to monitor soil moisture real-time and trigger water pumps or solenoid valves automatically when moisture drops below threshold levels.
  • Precision Gardening & Home Plant Care: Integrated into smart plant pots or home gardening systems to alert users (via smartphone or display) when house plants need watering.
  • Environmental & Soil Research: Employed in field data logging to track environmental moisture changes, soil hydrology, and ecological health over extended periods.
  • IoT & Smart City Projects: Connected with wireless modules (ESP32 / LoRaWAN / GSM) to send field moisture data to cloud platforms for remote monitoring and analytics.

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Capacitive Soil Moisture Sensor v2.0 (HW-390)

₹55.00