Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	5V DC
Sensor Type	Large-Area Rain Drop Detection
Output Signal	Digital Switch (DO) and Analog (AO)
Relay Contact	Dry-Contact Switch
PCB Dimensions	60mm x 40mm
Sensitivity	Adjustable via Potentiometer
Indicator LED	Power and Trigger Status
Mounting Holes	4x 3mm Diameter
Compatible Platforms	Arduino, Raspberry Pi, ESP32
Application	Water Level Detection, Automatic Wipers, Weather Stations

6 reviews

Anonymous

Mar 31, 2026

Rating: 4/5

Good sensitivity, easy to adjust

The potentiometer allows for precise tuning of sensitivity. I use it to close my greenhouse windows when it rains. Only minor issue is the soldering pads are a bit small for thick wires.

Anonymous

Mar 28, 2026

Rating: 5/5

Excellent component for automation

We used ten of these for a community garden irrigation system. They have been running for three months without failure. The response time is very fast.

Anonymous

Mar 22, 2026

Rating: 5/5

Great value for education

Bought this for a university robotics project. It's robust, clearly labeled, and the documentation online is helpful. The dry-contact switch feature is exactly what we needed for safety isolation.

Anonymous

Mar 21, 2026

Rating: 4/5

Works as advertised

Simple plug-and-play with 5V logic. The analog output is useful for measuring rain intensity, not just presence. Would recommend adding a conformal coating if using outdoors long-term.

Anonymous

Mar 16, 2026

Rating: 5/5

Reliable water detection

I've tested this in heavy rain and it triggers instantly. The build quality feels solid, and the PCB coating seems to protect the traces well from corrosion over time.

Anonymous

Mar 09, 2026

Rating: 5/5

Perfect for my weather station project

This sensor works flawlessly with my Arduino setup. The large area detects even light drizzle quickly, and the relay output makes it easy to trigger external devices without extra coding.

5 FAQ

Q: Can I use this with a 3.3V microcontroller like ESP8266?

A: Yes, but please note the relay coil requires 5V to activate reliably. You can power the module with 5V and connect the digital output to the 3.3V MCU, as the output is usually compatible, but check your specific logic levels.

Q: What is the maximum current the relay can handle?

A: The onboard relay is typically rated for up to 10A at 250VAC or 30VDC. Please refer to the specific relay model printed on your unit for exact specifications.

Q: Is the sensor sensitive enough to detect mist or fog?

A: The sensitivity is adjustable via the blue potentiometer. While it can detect heavy mist, it is primarily designed for raindrops and standing water. You may need to tune it carefully for fog.

Q: Can this module directly control a 12V water pump?

A: Yes, the onboard relay supports dry-contact switching. You can connect the 12V pump circuit to the relay terminals, while the module itself is powered by 5V.

Q: Does this come with connecting wires?

A: No, the module is sold without jumper wires or cables. You will need to source standard Dupont wires or solder your own connections based on your project needs.

Explore your interests

STC32G12K128 STC8H8K64U Microcontroller Small System Core Board Development Board Emulator

$16.50

Youxin Electronics_STM32H743IIT6 Core Board System Board Learning Board STM32 Development Board

$118.00

Arduino DUE Development Board 32-bit ARM Controller A000062 Italian Official Original Import with Cable

$299.00

Ultrasonic Sensor HC-SR04 Ultrasonic Distance Measuring Module Bracket US015-025-026-100

$3.16

Serial SHT20 Chip Temperature and Humidity Sensor Test, SHT30 Chip Measurement and Monitoring Module by Viter Intelligence

$11.00

High-Speed Yabo Smart Raspberry Pi 4B Motherboard Development Board Accessories RaspberryPi 2G/4G/8G RAM Py

$494.30

Magnetic Circular Counting Chips, Two-Sided Flip Coins for Elementary Math, Kindergarten Early Education, Ten-Frame Matrix, Addition/Subtraction within 10 & 20, Teaching Tools

$11.90

HC-SR501 Human Motion Infrared Sensor Module Compatible with Arduino micro:bit Eco-Friendly

$7.50

SANSI White Label Class A Glass Graduated Cylinder C18 Micro-Precision Demulsification Cylinder with Scale Measurement Includes Certificate Ground Joint Stopper Hexagonal Bottom Borosilicate Glass Lab Equipment

$3.68

EV2400 Battery Unlock Fuel Gauge Programmer MSP430 HPA500 Evaluation Module Interface Board SMBus

$323.00

Cube Three-View Teaching Aid with Grid - 3D Geometry Observation Tool for Grades 4-5 Math (2cm Cubic Blocks Set)

$15.10

OrangePi Orange Pi Zero3 Zero 3 Development Board Allwinner H618 Orange Pi

$228.00

Digital 38KHz Infrared Receiver Transmitter Head Sensor Module Electronic Building Blocks Robot Infrared Communication Remote Control

$2.29

12V Stable Version Light-Control Switch No-Light Sensing with Extension Cable Photoresistor Plus Relay Module

$49.20

STM32 Smart Car 51 Microcontroller Arduino Obstacle Avoidance Chassis Kit Mecanum Wheel Robot Car

$40.80

Tech Small Production Small Invention DIY Piano Electronic Keyboard Real Playable Science Small Handmade DIY Materials

$33.00

[Youxin Electronics] GP2Y0E03 Infrared Distance Sensor Module 4-50cm Range

$23.65

Transparent 3D Geometric Model Perspective Decomposition Graphic Teaching Aid, Complete Set for Elementary Grades 1-6 Math

$6.80

DHT22 Single-Bus Digital Temperature & Humidity Sensor AM2302 Module Electronic Building Blocks

$10.42

E18-D80NK Infrared Photoelectric Switch Diffuse Reflection Obstacle Avoidance Sensor Module 3-80CM

$12.60

LAN8720 Module Network Module Ethernet Transceiver RMII Interface Development Board Xinwei Electronics

$7.85

STC15W408AS Core Board Minimum System Board 51 Microcontroller Development Board TTSOP20 Learning Board

$18.47

New Version MEGA2560 R3 Development Board, Improved MEGA2560 R3 with Sensor Expansion Board

$13.68

Gradient Visual Illusion Kit: Electric Rotating Assembly Toy for Maker DIY, Paintable Handmade Model

$8.72

51/AVR Microcontroller Core Development Board STC89C52RC/51MCU Experiment Board/ATMEGA32 Learning Board

$37.90

[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set

$15.00

GY-30 302 Digital Light Intensity Illuminance Sensor BH1750FVI Module Light Sensor Ball

$7.41

Foldable Clothes Drying Rack Floor Standing Home Balcony Bedroom Hanging Clothes Quilt Drying Artifact Outdoor Cooling Rod Indoor Drying Rack

$47.10

Metal Detector Module Non-Contact Metal Induction Sensor Detection Module Metal Detector

$8.70

RV1103 Miniature Linux Development Board: RISC-V Vision and AI with Ethernet Port

$53.10

For Arduino Development Board R3 Mainboard Microcontroller Module Kit Programming Learning Board Sensor Suite

$78.00

Xuefen Geometry Stamping and Tracing Set for Grades 1-2, 3D and 2D Ink Pads, Math Learning Tools, Cube and Cuboid Models

$4.51

Rubber Tire Toy 4WD Smart Car Wheels Car Model Robot Accessories (Suitable for 2mm Axle)

$0.50

E18-D80NK Infrared Obstacle Avoidance Sensor Proximity Switch Smart Robot Car 10-80cm

$6.30

OPT3001/3002/3004 Ambient Light Sensor Module Measures Visible Light Density Digital Optical Sensor

$8.14

51 MCU Minimum System STC89C52 DIP40 Through-Hole Smart Car Main Control Board Learning Experiment

$19.80

Outdoor Adventure Kids' Insect Observation Box with Magnifying Glass, Boys & Girls Toy for Exploration, Butterfly Catching and Fish Scooping Tools

$7.80

Risym Laser Head Sensor Module Suitable for Laser Module Expansion Board Laser Sensor Development Board

$2.82

Freeze-Dried Chicken Treats for Dogs: Nutritious Weight-Gain Breast Meat Chunks for Puppies – Teeth Cleaning, Grain Mixing, Universal Use

$3.90

Soil Moisture Sensor Probe Soil Moisture Meter Detection Module Sensor Separate Probe

$2.39