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Home / Computer Hardware, Monitors & Peripherals / Standalone PCB Raindrop Sensor Module for Water Level and Flood Detection

Attributes

Brand -
Category Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin -
Operating Voltage 3.3V - 5V DC
Output Type Digital Switch Output (0 and 1)
PCB Dimensions 60mm x 20mm
Board Thickness 1.6mm
Working Current ≤ 20mA
Interface Type 3-Pin PH2.0 Connector
Material FR-4 Fiberglass with Nickel Plating
Net Weight 5g
Compatibility Arduino, Raspberry Pi, ESP8266, ESP32
Package Includes 1x Sensor Module, 1x Dupont Cable

5 reviews

A

Anonymous

Mar 15, 2026

Rating: 3/5

Corrodes over time

Works well initially but the exposed traces started to corrode after a few months of constant outdoor exposure. Might need conformal coating.

A

Anonymous

Mar 08, 2026

Rating: 5/5

Great for Arduino projects

Works exactly as described. I used this for a simple rain alarm system and the sensitivity is adjustable via the potentiometer. Very easy to integrate.

A

Anonymous

Feb 09, 2026

Rating: 4/5

Good sensitivity

Easy to use but requires some calibration to get the threshold right for light rain. Overall good value for the price.

A

Anonymous

Feb 05, 2026

Rating: 5/5

Perfect for leak detection

Set this up under my sink connected to a smart home hub. It triggers instantly when water touches the pads. Peace of mind.

A

Anonymous

Jan 24, 2026

Rating: 5/5

Fast delivery

Module arrived quickly and was well packaged. Tested it with a 5V relay and it switches perfectly when wet.

5 FAQ

Q: Can I use this with 3.3V logic boards?

A: Yes, the module operates comfortably between 3.3V and 5V DC, making it compatible with most microcontrollers.

Q: Can it measure specific water level depth?

A: No, this is a presence sensor. It detects if water is bridging the traces on the board, not the depth of the water.

Q: Does it come with connecting wires?

A: Yes, the package includes one 3-pin Dupont cable to connect the module to your controller.

Q: Is this sensor analog or digital?

A: This module provides a digital output (HIGH/LOW). There is a potentiometer on the board to adjust the sensitivity threshold.

Q: How long can it stay submerged in water?

A: It is designed for detection purposes. Prolonged submersion may lead to electrolysis and corrosion of the nickel-plated lines over time.

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