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.
Marie's Sketch Blending Knife Set for Highlights, Shadows, and Quick Sketches - Professional Art Student Smudging Tools with Sponge Blenders, Paper Stumps, and Full Correction Kit for Drawing and Tracing
$9.25
Meiao Dental Imported Implant Package: Swiss ITI Straumann Implant Abutment and Prosthetic Teeth
$5,955.00
Bottled Water Faucet Stand, Large Water Jug Dispenser Rack, Pure Water Bucket Holder with Inverted Drinking Cover
$7.13
Dust Extraction Sanding Table - Industrial Pulse Cartridge Collector for Polishing, Stone, and Woodworking Dust
$600.00
Diamond Tire 255/45R20
$518.00
Amusement Park Suspension Bridge - 15m/20m/25m/30m Viral Swing Bridge with Iron and Steel Chains
$58.00
Paint Spray Catalytic Combustion Equipment - Industrial Exhaust Gas Treatment Device - Activated Carbon Adsorption/Desorption CO Catalytic Combustion
$324,999.00
Car Wheel Tire Bolt Rust-Proof Cap Universal Size 17 19 21 Decorative Dust-Proof Protective Cap Cover
$15.70
Commercial Electric Vegetable Slicer - Multi-Function Stainless Steel Machine for Potatoes and Canteens
$2,017.28
Irregular Ticket Stub Watercolor Paper Stamp Blank Drawing Paper 300g Cotton Pulp Fine Texture Thickened with Serrated Edges Specialized Paper for Art Students
$5.60
Stainless Steel Electric Buffet Warmer with Visible Lid - Square Flip-Top Chafing Dish for Hotels
$251.70
Baohong Cotton Pulp Watercolor Paper Pad 300g Cold/Hot Press, Glued on Four Sides, 16K/8K - Premium Full Cotton Art Paper for Oil Pastels and Professional Artists (Baoding, China)
$17.00
ORDER Industrial Large Roll Wiper Paper Dispenser, TORK Multi-Convenience Roll Stand
$170.00
Lifting Chain Slings Manufacturer, MHU Lifting Gear, G80 Manganese Steel Hoisting Chains, Single and Double Leg Sets
$835.00
Multi-Function Bathroom Storage Rack for Toilet, Washroom, and Sanitary Supplies, Over-Toilet Home Organizer
$20.30
Portable Travel Art Set for Kids - Watercolor Paint Box with Sketchbook and Mini Drawing Board
$9.05
Pneumatic Fitting PU Straight Connector Quick-Insert Plastic High-Pressure Air Hose Fitting PU-4681012
$4.90
Chain Sling Lifting Shackle Steel Chain Single Leg with Hooks on Both Ends for Towing, 2m Length, 5 Ton Capacity
$79.00
Large Brush Set Supply - Watercolor Pen Set for Children's Day Painting, Art, and Coloring
$25.55
Non-Bleeding Liquid Candle Dye - Macaron Colors for Soy Wax DIY Aromatherapy Candles
$21.00
Alloy Wheel Lug Nut Caps Compatible with Buick Excelle, Verano, Regal, LaCrosse, Encore, Cruze, Malibu, and GL8
$3.40
![[Damai Holds Micro-Needle Hair Transplant Patent] AI Robot Precision Hair Transplant | 1000 Units Hairline Planting](https://www.gosteppe.com/cache/small/product/269438/legacy-main-d695e1be3b1b8212f24ac863.webp)
[Damai Holds Micro-Needle Hair Transplant Patent] AI Robot Precision Hair Transplant | 1000 Units Hairline Planting
$24,990.00
Premium Ceramic Tea Canister Packaging Box, Empty Gift Box for Black Tea, Pu'er, White Tea, Biluochun, Gift Set Empty Box
$104.95
Thickened 304 Stainless Steel Planter Box for Home Balcony Vegetable Gardening - Rectangular Large Flower Pot for Rooftop Planting
$204.00
Zhongheng Car Tire Stone Hook - Multi-Function Tire Cleaner Tool to Prevent Blowouts
$7.14
JoanMiro 3D Printing Pen for Kids, Low-Temperature 3D Stereoscopic Drawing Toy, Perfect Gift for Boys and Girls on Children's Day
$29.90
Stainless Steel Tire Stone Removal Hook - Multi-Function Car Tire Cleaning Tool for Picking and Scraping Stones
$5.03
Cart Cover Rice Husk Charcoal Premium Plant Ash Grain Shell Carbon Natural Organic Fertilizer for Vegetables Succulents and Flowers
$6.55
Aojilong Automotive Plastic Restorer – Revives Black Trim, Repairs Aging, Crystal Coating Finish
$28.80
Hotel Meat Warmer Lamp - Buffet Heating Light for Cafeterias and Restaurants
$5,989.00
![[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)
