Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | 3.3V - 5V DC |
| Output Type | Digital Switch Output (0 and 1) |
| Detection Area | 40mm x 16mm |
| Board Dimensions | 65mm x 20mm x 8mm |
| Comparator Chip | LM393 |
| Sensitivity | Adjustable via Potentiometer |
| Indicator LED | Power and Digital Switch Output |
| Mounting Hole Diameter | 3.0mm |
| Interface | 3-Pin PH2.0 Connector |
| Application Scope | Water Leak Detection, Rain Sensing, Liquid Level Monitoring |
Anonymous
Mar 30, 2026
Rating: 5/5
Compact and effective
Small footprint makes it easy to hide in tight spaces. I installed one under my washing machine to detect leaks. It triggered my smart home notification immediately during a test. Great peace of mind for such a low cost.
Anonymous
Mar 18, 2026
Rating: 5/5
Reliable water detection
I bought five of these for a tank level monitoring system. They are consistent and the digital output makes reading the state very simple without needing complex analog conversion logic. The build quality feels sturdy enough for indoor prototypes.
Anonymous
Mar 15, 2026
Rating: 4/5
Good value, easy to integrate
Great little module for the price. Integration with ESP32 was straightforward. The only reason for 4 stars instead of 5 is that the included pins were not pre-soldered, but that's standard for these types of boards. Highly recommend for beginners.
Anonymous
Mar 14, 2026
Rating: 5/5
Perfect for my Arduino rain project
This sensor works exactly as described. The sensitivity adjustment is very responsive, allowing me to fine-tune when the trigger activates. I used it to build a simple rain alarm for my balcony plants, and it has been reliable through several storms.
Anonymous
Mar 07, 2026
Rating: 5/5
Excellent for school projects
Used this for my final year engineering project on smart home safety. It detected water spills instantly. The documentation online is plentiful, which helped me write the code quickly. Very satisfied with the purchase.
Anonymous
Mar 04, 2026
Rating: 4/5
Works well but needs calibration
The sensor is sensitive, perhaps too sensitive out of the box. You definitely need to spend time adjusting the potentiometer to get the right threshold for your specific use case. Once calibrated, it performs flawlessly.
Q: What microcontroller boards is this compatible with?
A: It is compatible with any microcontroller that supports digital input at 3.3V or 5V logic levels, including Arduino Uno, Nano, Mega, ESP8266, ESP32, and Raspberry Pi (with appropriate voltage leveling if needed).
Q: Does the package include connecting wires?
A: Typically, the package includes the sensor module and a set of male-to-female jumper wires or header pins, depending on the specific SKU selected. Please check the 'What's in the Box' section of your specific order.
Q: Is this module waterproof for long-term submersion?
A: The sensing area is designed to get wet, but the electronic components (chip, resistors, pins) are not waterproof. Long-term submersion may cause corrosion or short circuits. It is best used for splash detection or intermittent contact.
Q: How do I adjust the sensitivity?
A: There is a blue potentiometer on the board. Use a small Phillips screwdriver to turn it clockwise to increase sensitivity (detect less water) or counter-clockwise to decrease sensitivity. Test with small water droplets while monitoring the output LED.
Q: Can this sensor measure the exact depth of the water in millimeters?
A: No, this is a digital switch sensor. It detects the presence or absence of water on the exposed traces. It does not provide an analog reading proportional to water depth.
Hairline Transplant | No-Shave Hair Transplant | 1-1500 Units Long Hair Planting for Natural Flow and Volume - Department Director Service
$25,800.00
Zhong Yao Xuan Shi Biao Small Regular Script Hard Pen Copybook, 1.8cm Column Width, Tear-Off Sheets for Precise Tracing – Source of Regular Script
$29.70
Chunfei Grocery Store Yun'an GR02 Gravel Bike Thru-Axle Disc Brake Lightweight Touring with Multiple Rack Mounts
$8,974.00
Anti-Tangle High-Strength Grade 100 Lifting Chain for Industrial Hoisting
$776.44
DIY Rose Essential Oil Handmade Soap Customization
$35.00
Adjustable Height Simple Storage Shelf - Wooden and Iron Bookcase, Steel-Wood Supermarket Display Rack
$256.00
DIY Handmade Soap Mold - Carnation Flower Rectangular Silicone Mold for Homemade Soap, Mother's Day Gift
$14.30
Fried Chicken Warmer Cabinet with Heat Lamp Small Single-Layer Insulated Box for Pies Youtiao Chestnuts and Roasted Sweet Potatoes Display Case
$500.00
Dried & Preserved Flower DIY Kit for Scented Candles – Ocean Style for Festivals, Team Building, and Workshops
$6.83
304 Stainless Steel Chain, Thickened Industrial Seamless Short/Long Link Chain for Lifting, Swing, or Dog Leash
$1.50
Large Bucket 502 Glue, Strong Instant Adhesive, Gold Material 502 Dry Glue for Leather, Metal, Furniture, and Plastic Bonding by Manufacturer
$1,893.00
Rectangular Plastic Vegetable Planter for Balcony - Durable Home Gardening Pot
$12.90
Chinese Painting Line Drawing Copybook, Gongbi Sketch Template, Large-Scale Tracing Album, Ancient Style Brush Control and Line Practice Book
$7.48
German Continental Tires 225/45R17 Run-Flat, 19-Inch Original Authentic with Full Tread Patterns
$380.00
Dynamic Sheet Music Simplified Notation Accompaniment for Electric Wind Instrument Saxophone Hulusi Ocarina Flute Bamboo Flute
$10.00
LL Industrial Lint-free Wiping Paper - Oil and Water Absorbent Non-woven Fabric (White/Blue Large Roll)
$185.82
Continental Quiet Used Car Tires 225/235/245/255/265-35/40/45/50 R17/18/19/20/21/22/23
$284.00
Negotiable Price: Siemens Load Cell 7mh4106-5ec11, Brand New Unused, Contact for Price Negotiation
$1,332.00
Premium Over-Toilet Storage Organizer, Wall-Mounted Bathroom Shelf, No Drilling Required, Multi-Function Toilet Rack
$31.76
Model 2000 Large Commercial Vegetable Cutter for Slicing, Dicing, and Cutting Leafy Greens and Kimchi
$11,000.00
Aromatherapy Candle Tool Set - Includes Igniter, Snuffer, Wick Trimmer, Flame Extinguisher Cover, and Rotating Carousel Ornament
$2.55
onlycook 304 Stainless Steel Kitchen Rack with Narrow Edge for Sink, Dishcloth Drainer, and Sponge Basket
$36.50
7-Piece Square Succulent Pot Set with Trays - Durable Plastic Colorful Root-Control Planters
$75.50
Minimalist Japanese Style Kitchen Sponge Brush Dish Soap Drain Rack Air-Dry Cloth Rack Sink Organizer Box
$21.00
PVC Cable Cover Speed Bump Style Wire Protector for Indoor Cables and Pipes
$9.10
Spiegel BGF-161 Portable Tire Stone Removal Hook - Multi-function Tool for Cleaning Car Tire Treads
$7.84
7A Natural Amethyst Purple Rabbit Hair Loose Beads for Women's DIY Bracelets and Snowflake Necklaces
$3.83
DIY Handmade Soap Silicone Mold, Essential Oil Soap, Creative Gift Soap Base and Aromatherapy Materials, Love Forever Design
$12.90
Flameless Aromatherapy Diffuser with Essential Oils, Dried Flowers, and Preserved Flower Decor
$13.60
DOUBLECOIN 7.00R16LT-14 (RSS2) All-Steel Radial Truck Tire - Economical and Wear-Resistant
$1,375.00
![[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)
