1 3
Genuine Products 100% Authentic
Easy Integration Plug & Play
Reliable Performance Consistent & Stable
Reliable Quality Tested & Verified

Soil Moisture Sensor - Hygrometer Module

SKU: 78MQ1DKXBE
★★★★ ★ ★
4.5 (64 reviews)
The Soil Moisture Sensor Hygrometer Module is a simple and cost-effective sensor designed to measure the moisture content of soil by detecting its electrical conductivity. It consists of a soil moisture probe and an LM393 comparator module. As the moisture level in the soil changes, the resistance between the two probe electrodes changes accordingly, allowing the module to determine whether...
Rs. 49.00
Rs. 59.00 Rs. 49.00
Save Rs. 10
Sold out
Tax included. Shipping calculated at checkout.
COD Available
Easy Return
Quality Assured
12 people are viewing this right now
Secure Checkout With
For Bulk Order Contact Us View full product details
Same Day Dispatch Order before 2PM
Pan India Delivery Shipping in 24-48H
Secure Packaging Safe & Damage Free
Dedicated Support Expert Assistance

The Soil Moisture Sensor Hygrometer Module is a simple and cost-effective sensor designed to measure the moisture content of soil by detecting its electrical conductivity. It consists of a soil moisture probe and an LM393 comparator module. As the moisture level in the soil changes, the resistance between the two probe electrodes changes accordingly, allowing the module to determine whether the soil is dry or wet.

The module provides both analog (AO) and digital (DO) outputs, making it suitable for a wide range of applications. The analog output provides continuous moisture readings, while the digital output uses an onboard potentiometer to generate a HIGH or LOW signal once a preset moisture threshold is reached. This makes the module ideal for automatic irrigation systems, smart gardening, agricultural monitoring, and educational electronics projects.

Compatible with Arduino, ESP32, STM32, Raspberry Pi (with an ADC for analog reading if required), PIC, AVR, and other microcontrollers, the Soil Moisture Sensor Module is widely used in IoT-based plant monitoring systems, greenhouse automation, and DIY projects.

Key Features

  • Conductivity-based soil moisture detection
  • Dual analog and digital outputs
  • Built-in LM393 voltage comparator
  • Adjustable digital output threshold using onboard potentiometer
  • High sensitivity to soil moisture changes
  • Power and output status LEDs
  • Operates from both 3.3V and 5V systems
  • Easy 4-pin interface
  • Fast response and stable operation
  • Compact module with detachable probe
  • Compatible with Arduino, ESP32, STM32, Raspberry Pi, and other microcontrollers
  • Suitable for automatic irrigation and smart farming applications
  • Easy to install and integrate
  • Ideal for educational and DIY electronics projects

Shipping & Returns

Orders placed before 3 PM IST will be shipped on the same day (excluding Sundays and Public holidays) through our shipping partners. In rare cases, the pickup may get delayed during Public holidays / Bandh / Environmental disturbances.

Specifications

Specifications:

Module Type: Soil Moisture Sensor (Hygrometer) Module
Detection Principle: Electrical Conductivity (Resistance Measurement)
Comparator IC: LM393
Operating Voltage: 3.3V to 5V DC
Operating Current: Approximately 15mA
Output Type: Analog (AO) and Digital (DO)
Digital Output: TTL Logic Level
Analog Output Voltage: Proportional to Soil Moisture Level
Sensitivity Adjustment: Onboard Potentiometer
Status Indicators: Power LED and Digital Output LED
Detection Method: Conductivity Between Dual Probe Electrodes
Response Time: Fast Response
Operating Temperature: -10°C to +60°C
Operating Humidity: 5% to 95% RH (Non-Condensing)
Probe Material: Nickel-Plated Conductive Electrodes (Variant Dependent)
Module Dimensions: Approximately 32mm × 14mm
Probe Dimensions: Approximately 60mm × 20mm
Mounting Type: PCB Module with Through-Hole Pins
Compatibility: Arduino UNO, Nano, Mega, ESP32, STM32, Raspberry Pi (with ADC where required), AVR, PIC, 8051 and other microcontrollers.

Additional Resources

Soil Moisture Sensor.PDF

FAQ

1. What is the Soil Moisture Sensor Hygrometer Module used for?

The Soil Moisture Sensor Module is used to measure the moisture level of soil for applications such as automatic irrigation systems, smart gardening, greenhouse monitoring, agricultural automation, and plant care.

2. Does the module provide both analog and digital outputs?

Yes. The module provides an analog output (AO) that varies with soil moisture and a digital output (DO) whose switching threshold can be adjusted using the onboard potentiometer.

3. Can the Soil Moisture Sensor be used with Arduino and ESP32?

Yes. The module is compatible with Arduino, ESP32, STM32, AVR, PIC, and Raspberry Pi. Since the ESP32 uses 3.3V logic, it can interface directly with the module when powered appropriately.

4. How does the Soil Moisture Sensor work?

The sensor measures the electrical conductivity between two metal probes inserted into the soil. Wet soil conducts electricity better than dry soil, allowing the module to estimate the moisture level based on the measured resistance.

5. Is the Soil Moisture Sensor suitable for long-term outdoor use?

The module can be used outdoors; however, prolonged exposure to moisture may cause corrosion of the exposed metal probes. For long-term installations, corrosion-resistant or capacitive soil moisture sensors are generally recommended.