Resistive Soil Moisture Sensor Module

Resistive Soil Moisture Sensor Module, Accurate Soil Moisture Monitoring

The Resistive Soil Moisture Sensor Module is a compact and dependable sensor designed to measure soil moisture levels using conductive probes. It provides both analog and digital outputs for flexible use in hobbyist and professional projects, helping you optimize watering schedules, protect plants, and conserve water.

Key Features

• Precise Resistive Measurement: Detects soil moisture by measuring resistance between two probes; resistance decreases as moisture increases.
• Analog Output (A0): Variable voltage proportional to soil moisture level, ideal for logging, display, and analog-to-digital conversion with microcontrollers.
• Digital Output (D0): Configurable high/low signal that toggles when moisture crosses the potentiometer-set threshold for simple on/off control.
• Adjustable Sensitivity: Onboard potentiometer allows you to set the trigger point for the digital output according to soil type and application.
• Durable Probes: Corrosion-resistant probes designed for long-term exposure to soil and moisture.
• Wide Voltage Compatibility: Operates from 3.3V to 5V DC, compatible with Arduino, Raspberry Pi (via ADC), ESP boards, and other development platforms.

How It Works

The module uses two metal probes inserted into soil. Moisture in the soil conducts electricity between the probes; wetter soil results in lower resistance and a higher analog voltage output. The onboard comparator converts the analog reading into a digital high or low output when the measured voltage crosses the user-adjusted threshold.

Outputs and Compatibility

• Analog Output: Connect A0 to an ADC pin (Arduino analog input, external ADC for Raspberry Pi) to read varying moisture values.
• Digital Output: Connect D0 to a digital input to receive a simple wet/dry signal for relays, pumps, or alarms.
• Power: 3.3V to 5V DC; GND and VCC pins included for straightforward wiring.

Installation and Wiring (Quick Guide)

• Insert the probe into the root zone of the plant at a representative depth.
• Connect VCC to 3.3V or 5V, GND to ground, A0 to an ADC input for analog readings, and D0 to a digital input for threshold alerts.
• Adjust the potentiometer while monitoring A0 or D0 to set the desired moisture threshold.
• For long-term deployments, avoid leaving the probes permanently in highly acidic soils if not using protective coatings; periodically check condition.

Common Applications

• Automated drip irrigation systems and pump control.
• Home and commercial gardening or greenhouse monitoring.
• Environmental monitoring and soil research projects.
• Smart plant pots, school STEM projects, and prototyping.

Specifications

• Sensor Type: Conductive resistive soil moisture sensor
• Output: Analog voltage (A0) and Digital signal (D0)
• Power Supply: 3.3V to 5V DC
• Operating Temperature: -10°C to 60°C
• Material: Corrosion-resistant probe construction
• Dimensions: Compact module for easy installation

Why Choose This Resistive Soil Moisture Sensor Module

This module balances affordability, ease of integration, and reliable performance. Its combination of analog and digital outputs plus an adjustable threshold potentiometer makes it ideal for a wide range of projects from simple garden automation to more advanced environmental monitoring systems.

Note: Images are for illustration purposes only. The actual product may vary slightly in appearance.