Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | 3.3V - 5V DC |
| Output Signal | Digital Switch (High/Low) |
| PCB Size | 60mm x 20mm |
| Material | FR-4 Fiberglass with Nickel Plating |
| Sensitivity | Adjustable via Potentiometer |
| Indicator | Green Power LED, Red Detection LED |
| Connector Type | 3-Pin PH2.0 Header |
| Application | Rain Detection, Water Level Monitoring, Leak Alarms |
| Compatibility | Arduino, Raspberry Pi, ESP32, Micro:bit |
| Package Includes | 1x Sensor Module, 1x Jumper Wire Set |
Anonymous
Mar 28, 2026
Rating: 4/5
Good value, needs careful handling
Works exactly as described for our home garden moisture project. The only reason for 4 stars is that the traces can corrode if left in standing water for weeks without drying. For intermittent rain detection, it is flawless.
Anonymous
Mar 26, 2026
Rating: 4/5
Simple but effective
Does one job and does it well. Detects water presence instantly. I wish the connecting wires were a bit longer, but that's a minor issue easily solved with extensions.
Anonymous
Mar 25, 2026
Rating: 5/5
Perfect for Classroom Projects
I bought ten of these for my 8th-grade physics class. They are incredibly easy to interface with Arduino boards. The students successfully built rain alarms in a single period. The sensitivity adjustment is a great teaching point for calibration.
Anonymous
Mar 16, 2026
Rating: 5/5
Great for Science Fair
Used this for my high school science fair project on smart agriculture. It was very easy to code and the LEDs provide clear visual feedback. Highly recommend for beginners learning about sensors.
Anonymous
Mar 09, 2026
Rating: 5/5
Reliable and Sensitive
The potentiometer allows you to fine-tune when the alarm triggers. I set it up to notify me when my basement sump pump activates. It has been running for two months without false positives.
Anonymous
Mar 05, 2026
Rating: 5/5
Sturdy construction
We have used these in outdoor robot prototypes. The PCB coating seems decent for short-term exposure to rain. The digital output makes integration with our microcontrollers very straightforward.
Q: What is the maximum current this module can handle?
A: This is a signal sensor module, not a power relay. The output pin should only be connected to a microcontroller input or a low-current indicator. Do not connect it directly to high-power loads like motors or pumps.
Q: Is the output analog or digital?
A: The primary output is digital (HIGH/LOW). However, because it includes an adjustable potentiometer, you can also tap into the comparator circuit to get variable readings if you modify the wiring, though it is designed primarily as a switch.
Q: Does it come with a waterproof casing?
A: No, the module is sold as a bare PCB component intended for DIY integration. You will need to design or purchase a separate enclosure if you plan to install it in a location with heavy direct rainfall.
Q: Can this sensor detect saltwater or just fresh water?
A: This sensor detects conductivity, so it will work with both fresh water and saltwater. However, saltwater may accelerate corrosion on the exposed traces, so we recommend rinsing with fresh water after exposure to saline environments.
Q: How do I adjust the sensitivity?
A: There is a small blue potentiometer on the back of the board. Use a small Phillips screwdriver to turn it clockwise to decrease sensitivity (requires more water) or counter-clockwise to increase sensitivity.
Multi-Function Car Tire Stone Removal Tool with Hook for Picking Out Rocks
$4.06
Label Stripping Machine – Semi-Automatic Unit for Beer, Baijiu, and Glass Bottle Label Removal; Custom Manufacturing Available
$19,980.00
High-Strength Manganese Steel Lifting Chain 6*18mm G80 Wear-Resistant Towing Chain
$84.34
Touchmark Acrylic Markers for Elementary Art, Washable Watercolor Pens for Kids' Drawing and Painting
$10.80
Official Flagship Store Steel Tongue Drum, C Key, 6-inch, 11 Notes, Carbon Steel Performance Grade Instrument for Kids and Students
$41.10
Outdoor Waterproof Backpack Camouflage Dry Bag with Wet/Dry Separation for Swimming, Rafting, and Trekking
$8.42
![[Save $50 on Order] Bundle: 5 Notebooks + 2 Pens + 20 Refills + 2 Grip Correctors](https://www.gosteppe.com/cache/small/product/270170/legacy-main-59be8c850af1ec303ad4901b.webp)
[Save $50 on Order] Bundle: 5 Notebooks + 2 Pens + 20 Refills + 2 Grip Correctors
$39.90
Sketching Tool Set for Art Students - Includes Blending Stumps, Tortillons, Paper Stumps, Sponge Balls, Cotton Swabs, Highlight Pens, Gray Tone Tools, Insert Knives, Smudging Knives, Scrapers, and Blending Cotton
$7.65
Suede Rope Korean Velvet Rope DIY Aromatherapy Candle Plaster Tag Hanging Cord Packaging Gift Box Ribbon Decorative Leather Rope
$0.85
![[Damai Holds Microneedle Hair Transplant Patent] Hair Collagen | Improves Hair Loss, Nourishes Dermis and Follicles](https://www.gosteppe.com/cache/small/product/270167/legacy-main-9c6481bdd960acdf68495a0e.webp)
[Damai Holds Microneedle Hair Transplant Patent] Hair Collagen | Improves Hair Loss, Nourishes Dermis and Follicles
$1,980.00
Selected Factory Low-Temperature 3D Printing Pen for Kids, Children's 3D Printing Pen Set, 3D Drawing Pen
$100.02
Milk Pasteurization Line - Small-Scale Yogurt Production Machine for Liquid Yogurt and Pasteurized Milk
$8,148.00
Commercial Small Heating Warmer Cabinet, Glass Constant-Temperature Countertop Display Case for Egg Tarts, Burgers, and Fried Chicken
$884.00
Custom Seal Stamp Engraving Personal Name Phone Number Private Chop
$5.89
Commercial Food Warmer Cabinet for Milk, Soy Milk, Burgers, Egg Tarts, Fried Chicken, Pies, Youtiao, and Bread Display
$1,355.00
PJ0040 Rose Embossed Cross Silicone Mold - For Candles, Aromatherapy, Soap, Plaster, and DIY Crafts
$11.20
Yuwell Oxygen Concentrator Control Board Motherboard 8F-3AW/8F-5AW/9F-5BW
$120.00
Leyingfang Floating Pen for Kids and Students - Water-Based Non-Toxic Erasable Whiteboard Pen for Drawing in Water, Large Capacity Suspension Pen
$18.00
Car Wheel Lug Nut Covers - Colorful Silicone Dust-Proof and Rust-Proof Caps for Tire Bolt Protection and Exterior Styling
$8.80
Automatic Stainless Steel Vegetable Slicer for Ginger, Potatoes, Carrots, Onions, and Cabbage - Commercial Dicing Machine
$3,951.36
![[Damai Holds Micro-Needle Hair Transplant Patent] Top Thinning Hair Transplant | Micro-Needle Density Enhancement (500 Units)](https://www.gosteppe.com/cache/small/product/270156/legacy-main-525bdaff56f89ee94752ef9c.webp)
[Damai Holds Micro-Needle Hair Transplant Patent] Top Thinning Hair Transplant | Micro-Needle Density Enhancement (500 Units)
$7,000.00
Little Leather Paper Strip Music Box (30-Note) Sheet Music - Contact Before Ordering; Specify Song Email for Digital Score Delivery
$1.00
Kitchen Sink Strainer Basket Push-Type Food Residue Separator Filter Hanging Storage Rack
$3.80
Heavy-Duty Heat-Treated CV Joint Puller Tool - Axle Ball Cage Removal and Installation Device for Automotive Repair
$66.00
Mobile Integrated Waste Transfer Station - 17 Cubic Meters Movable Compression Container
$159,443.00
Antique Glaze White Ceramic Brush Washer Large Brush Washer Water Pot Ink Stone Washing Calligraphy Painting Brush Washing Basin Four Treasures of the Study
$16.80
Authentic Chinese Philosophy Classics: Di Tian Sui, Qiong Tong Bao Jian, San Ming Tong Hui - Annotated & Illustrated Edition
$29.90
Household Disposable Kitchen Sink Garbage Filter Mesh Drain Pool Dishwashing Basin Strainer Vegetable Bowl Leftover Sink
$3.51
Continental Run-Flat Tires: 225/235/245/255/265 45/50/55 R17/R18/R19/R20/R21/R22
$357.00
Foldable Steel Tire Stone Removal Hook - Multi-Tool for Tire Repair, Stone Picking, and Emergency Window Breaking with Storage Bag
$11.70
![[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set](https://www.gosteppe.com/cache/medium/product/208273/legacy-main-9ec245ebf781f65a434ba854.webp)
