Raindrops Detection Sensor Module 3.3V–5V | Rain Water & Humidity Sensor for Arduino, IoT & Smart Home Automation

Product Description

The Raindrops Detection Humidity Sensor Module is a simple and reliable device used to detect rainfall, water splashes, or humidity levels on a surface. It consists of a rain detection board and a comparator module that converts analog moisture levels into a digital output signal.

This sensor works perfectly with Arduino, Raspberry Pi, ESP32, and other microcontrollers to trigger actions such as closing windows, activating alarms, or controlling motors in smart home and IoT projects.

With a wide operating voltage range (3.3V–5V) and adjustable sensitivity, it provides consistent and accurate water detection even in outdoor environments. The module is compact, easy to integrate, and ideal for both learning and professional automation systems.

Key Features

• Operating Voltage: 3.3V – 5V DC

• Sensor Type: Raindrop detection and humidity sensor

• Output Signals:

  • Analog Output (AO): Measures moisture intensity

  • Digital Output (DO): High/Low signal (via onboard LM393 comparator)

• Indicator LEDs: Power and signal status LEDs

• Adjustable Sensitivity: Potentiometer for detection threshold tuning

• Detection Board: Corrosion-resistant PCB with large sensing area

• Interface Pins: VCC, GND, AO, DO

• Operating Temperature: -10°C to +70°C

• Dimensions: Compact design for easy mounting

• Compatibility: Works with Arduino, ESP32, Raspberry Pi, STM32, and other microcontrollers

Advantages

• Detects rainfall, water leakage, or surface humidity in real-time.

• Adjustable sensitivity for custom water detection levels.

• Simple plug-and-play interface for microcontrollers.

• Dual output (analog + digital) for flexible applications.

• Low-cost and reliable component for environmental sensing projects.

Applications

• Rain and weather monitoring systems

• Smart irrigation and greenhouse automation

• Water leakage and flood detection

• Automatic window or roof control

• Arduino and IoT educational projects