Rain Drop Sensor

The Rain Drop Sensor detects water and rainfall through exposed PCB traces that change resistance when wet. An affordable solution for weather monitoring, smart irrigation, and automated window/skylight systems.

Key Features

• Rain and water detection via conductive PCB surface
• Analog output proportional to water coverage
• Digital output with adjustable threshold
• Adjustable sensitivity via onboard potentiometer
• LED indicator for detection status
• Compact module with separate detection board
• 3.3V-5V operation compatible with all microcontrollers

Technical Specifications

Applications

• Smart irrigation control (skip watering when raining)
• Automatic window/skylight closing systems
• Weather monitoring stations
• Rainfall intensity measurement
• Outdoor equipment protection
• Agriculture automation

Important Notes

• Keep sensor surface clean for accurate detection
• May corrode over extended outdoor use
• Not for submersion – surface water detection only
• Calibrate threshold for your expected rainfall intensity
• Shield from direct water spray to avoid false triggers