Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | 3.3V - 5V DC |
| Output Type | Digital Switch Output (0 and 1) |
| Comparator Chip | LM393 Wide Voltage Comparator |
| Sensitivity | Adjustable via Potentiometer |
| PCB Size | 3.2cm x 1.4cm |
| Mounting Hole Diameter | 3.0mm |
| Interface | 3-Pin Pinhead (VCC, GND, DO) |
| Application | Water Level Detection, Rain Alarm, Liquid Leak Detection |
| Material | FR-4 PCB with Nickel Plated Traces |
| Package Includes | 1x Water Level Sensor Module |
Anonymous
Mar 29, 2026
Rating: 5/5
Perfect for my Arduino rain alarm project
This sensor works exactly as described. The sensitivity adjustment is very responsive, allowing me to trigger the alarm only when significant water is present. Great value for the price.
Anonymous
Mar 27, 2026
Rating: 5/5
Easy to integrate
Used this for a university prototype regarding tank level monitoring. The digital output makes it incredibly easy to interface with microcontrollers like ESP32 or Arduino without complex coding.
Anonymous
Mar 16, 2026
Rating: 5/5
Reliable water detection
I have three of these running in my smart garden setup to detect overflow. They have been working continuously for two months without any false positives or corrosion issues so far.
Anonymous
Mar 10, 2026
Rating: 5/5
Great for education
Bought a batch for our robotics club. Students found them very intuitive to work with. The clear labeling on the PCB helps beginners understand pinouts quickly.
Anonymous
Mar 07, 2026
Rating: 4/5
Good module, needs calibration
The build quality is solid. You definitely need to spend a minute adjusting the potentiometer to get the threshold right for your specific use case, but once set, it is reliable.
Anonymous
Mar 04, 2026
Rating: 4/5
Compact and effective
Small footprint makes it easy to hide in enclosures. The only reason for 4 stars instead of 5 is that the soldering points are a bit small for thick wires, but standard jumper wires fit perfectly.
Q: What is the maximum current this module can handle?
A: This is a signal sensor module, not a power relay. The output pin is designed to send a logic signal to a microcontroller and should not be used to drive high-current loads directly.
Q: How do I adjust the sensitivity of the detection?
A: There is a blue potentiometer on the board. Use a small screwdriver to rotate it clockwise to increase sensitivity or counter-clockwise to decrease it while testing with water droplets.
Q: Does this module provide an analog output for measuring exact water levels?
A: No, this specific module provides a digital switch output (High/Low) indicating the presence or absence of water at the sensor traces. For analog depth measurement, you would need a different type of sensor.
Q: Can this be used directly with a 3.3V microcontroller like the ESP8266?
A: Yes, the module operates on a wide voltage range of 3.3V to 5V, making it fully compatible with 3.3V logic systems like the ESP8266 and ESP32.
Q: Is the PCB coated to prevent corrosion from long-term water exposure?
A: The board has a standard solder mask and nickel plating which offers basic protection. However, for permanent submersion, we recommend applying an additional conformal coating to extend the lifespan.
Mold Release Oil for Incense Beads and Tags - Colorless, Odorless, Food-Grade Auxiliary Release Agent
$8.00
Tafara Aromatherapy Matches - Premium Extended-Length Safety Matches for Incense Burners (20 Count)
$23.80
Magnetic Sponge Holder and Steel Wool Rack for Sink, Stainless Steel No-Drill Kitchen Organizer
$9.94
Touchmark Square Sketchbook for Acrylic Markers - Thick Paper Art Journal for Quick-Dry, Smudge-Free Drawing
$10.80
Mo Hao Detail Brush Set, Goat Hair Liner, Wolf Hair Round/Flat Brushes for Oil Painting, Art & Gouache
$78.00
Authentic Military-style Socks for Men - Summer and Winter Anti-odor Sweat-absorbing Mid-calf Black and Navy Blue Training and Sports Socks
$23.80
Alliance Authorized Plaque - Yoga Alliance RYT, Pilates Alliance, International Yoga Alliance, China Yoga Alliance
$380.00
Xiupu Fraycolor Marker Airbrush Kit for Figure Model Painting Portable Rechargeable Airbrush and Pump Set
$127.00
Caoyige Thickened Felt Calligraphy Mat with Bound Edges - Ideal for Students and Beginners Practicing Brush Writing
$4.93
Colored Paper Signing Board CP Autograph Panel Japanese Anime Drawing Paper Watercolor Paper Square Blank Signature Card for Markers Anime OC Hand-Drawn Cards
$10.80
Water Brush Pen Set Large Capacity Beginner Gouache Solid Watercolor Paint Brush Tools Line Drawing Art Student Supplies
$32.00
Custom Solid Wood Plaque - Antique Carved Wooden Sign for Shop Grand Opening, Doorway Decoration, Wood Carving, and Couplets
$50.00
Retainer Storage Case for Invisible Aligners, Children's Orthodontic Appliances, and Dentures - Portable Cleaning and Drainage Box for Elderly and Kids
$11.90
Manufacturer Supply 460 Fast-Drying Glue: High Viscosity, Instant Bond, Low Whitening, Odorless
$64.00
Large Commercial Electric Peeler - Automatic Peeling Machine for Fruits and Vegetables like Pineapple, Potato, Winter Melon, Pumpkin, and Cantaloupe
$615.00
DH-20AC Compressed Air Refrigerated Dryer - 2.6 Cubic Meters, High-Temperature Air-Cooled, Compact Air Compressor Dryer
$4,180.00
Large-Capacity Quilt Storage Bag for Clothes, Comforters, and Down Jackets; Compression Bag for Moving and Luggage
$3.50
No-Drill Invisible Cable Organizer, Self-Adhesive Wire Fixer, Data Line Clip for Cable Management and Network Routing
$3.31
Stainless Steel Polishing Needle for Agarwood and Sandalwood Beads, Handmade Incense Tool, DIY Incense Materials
$15.00
Rectangular Plastic Planter for Outdoor Balcony Gardening - Ideal for Vegetables and Strawberries
$75.50
Windshield Washer Pump for Mitsubishi Outlander 8L84-17664-AA
$81.28
Lotus DIY Handmade Soap Silicone Mold - Lotus Leaf, Root, and Seed Pod Designs for Soap Base and Baking
$4.93
Multi-Function Herbal Slicer and Dicer for Roots, Rhizomes, Vines, Leaves, and Branches | Slicing Machine for Acorus Tatarinowii, Dried Tangerine Peel, and Polygonatum
$500.00
Multifunctional Outdoor Water Bag Swimming Float Maijia Qian Safety Buoy 10KG Tent Ballast Water Storage Bag
$21.89
Natural Mint Aromatherapy Incense, Osmanthus and Gardenia Scents, Mugwort Stick Incense for Bedroom, Refreshing and Sleep-Aiding
$6.43
Factory Stock Kubu Asu Washing Machine - Commercial Canned Fruit Hawthorn and Cherry Bubble Cleaning Equipment
$7,066.00
No More Games - Leslie Cheung & Koji Tamaki Saxophone Cover with City Pop Sheet Music and Backing Track
$26.00
2026 New Year Rubbing Art Kit - DIY Craft Material Set with Horse Year Fu Character Stencils for Kindergarten
$3.98
Used Car Tires 185 195 205 215 235/55 60 70R13 14 15 16 Random Tread Pattern
$57.80
Sponge Stamp Painting Tools Stamping Rods Kindergarten Children's Art Supplies Mushroom Head Sponge Brushes
$3.50
![[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)
