Smart Farming

A rain sensor module is an intelligent tool for precise rain detection. It can function as a switch when raindrops fall on the detection board or as a measurement device for rainfall intensity. The module features a separate rain board and control board for enhanced convenience, with a power indicator LED and adjustable sensitivity via a potentiometer.

How it works: When connected to a 5V power supply, the LED turns on when the induction board is dry (DO output is high). When water is detected, the DO output goes low and the switch indicator activates. After the water evaporates or is removed, the system returns to its initial high-level output state.

Key Features

Premium Construction: Adopts high-quality RF-04 double-sided material with 5cm x 4cm nickel plate
Durable Design: Anti-oxidation, anti-conductivity properties ensure long service life
Precise Output: Clean comparator output signal with strong driving ability (over 15mA)
Adjustable Sensitivity: Built-in potentiometer for fine-tuning detection thresholds
Dual Output: Digital switching output (0/1) and analog voltage output (AO)
Easy Installation: Includes bolt holes for secure mounting
Compact Size: Small PCB dimensions (3.2cm x 1.4cm) for versatile integration
Reliable Components: Utilizes wide voltage LM393 comparator for stable operation

Technical Specifications

Parameter	Value
Working Voltage	5V DC
Output Format	Digital (DO) and Analog (AO)
Detection Area	5cm x 4cm
PCB Size	3.2cm x 1.4cm
Comparator	LM393
Operating Temperature	-10°C to 50°C

Industrial Applications

Automotive Systems: Automatic windshield wiper activation when rain is detected
Smart Buildings: Roof-mounted sensors for weather-responsive building management
Meteorology: Integration into weather stations for precise precipitation monitoring
Home Automation: Triggering automatic window closures and awning retraction
Flood Prevention: Real-time rainfall monitoring for early flood warning systems
Smart Irrigation: Rain detection for automatic sprinkler system pausing
Traffic Management: Road surface monitoring for hazardous condition alerts
Disaster Response: Critical data collection during extreme weather events

Pro Tip: For optimal performance, regularly clean the detection surface and recalibrate sensitivity based on seasonal weather patterns. The analog output provides valuable data for rainfall intensity measurement applications.