Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | 3.3V - 5V DC |
| Output Signal | Digital Switch Output (0 and 1) |
| Detection Medium | Water and non-corrosive liquids |
| PCB Dimensions | 65mm x 20mm x 8mm |
| Fixed Bolt Hole Diameter | 3.0mm |
| Comparator Chip | LM393 |
| Sensitivity Adjustment | Adjustable via potentiometer |
| Interface Type | 3-pin PH2.0 connector |
| Working Temperature | -10°C to +50°C |
| Application Scope | Arduino, Raspberry Pi, DIY projects |
Anonymous
Mar 29, 2026
Rating: 5/5
Perfect for my aquarium project
This sensor works exactly as described. I used it to monitor the water level in my custom aquarium setup, and the digital output is very stable. The sensitivity adjustment screw makes it easy to calibrate for different liquid types.
Anonymous
Mar 28, 2026
Rating: 5/5
Great for beginners
As someone new to electronics, I found this module very forgiving. The three pins are clearly labeled, and it doesn't require complex circuitry. It instantly helped me build a water leak alarm.
Anonymous
Mar 26, 2026
Rating: 4/5
Solid performance
Works well for general liquid level monitoring. The board quality seems decent with good soldering points. Just ensure you do not submerge the entire PCB, only the sensing traces at the bottom.
Anonymous
Mar 25, 2026
Rating: 5/5
Reliable detection
I tested this with both fresh water and salt water. It detects the surface level accurately every time. The LM393 comparator ensures a clean signal transition, which is crucial for my logic controller.
Anonymous
Mar 11, 2026
Rating: 4/5
Good value, easy to integrate
Integrated this with an Arduino Uno without any issues. The code examples found online worked immediately. Only giving 4 stars because the included wires are a bit short, but otherwise a solid module.
Anonymous
Mar 01, 2026
Rating: 5/5
Essential for auto-watering system
Using two of these in my greenhouse reservoir. One for low-level warning and one for high-level cutoff. They have been running continuously for a month with no false triggers. Highly recommended.
Q: How do I adjust the sensitivity?
A: There is a blue potentiometer on the board. Turn it clockwise to increase sensitivity (detect lower liquid levels) and counter-clockwise to decrease it. Test with your specific liquid to find the optimal setting.
Q: Can this sensor detect oil levels or just water?
A: This sensor can detect most non-corrosive conductive liquids, including water and some oils. However, highly viscous or non-conductive fluids may require calibration or might not trigger the sensor reliably.
Q: Is this module waterproof?
A: The sensing traces at the bottom are designed to come into contact with liquid, but the electronic components on the top side of the PCB are not waterproof. Please avoid submerging the entire module.
Q: Does this work with 3.3V logic systems like ESP32?
A: Yes, the module operates on a voltage range of 3.3V to 5V, making it fully compatible with 3.3V logic systems such as the ESP32, ESP8266, and 3.3V Arduino boards.
Q: What is the maximum current this output pin can handle?
A: The digital output pin is intended for signal processing and should be connected to a microcontroller GPIO. It is not designed to drive high-current loads directly; please use a relay or transistor for switching pumps.
Handmade Soap and Baking Cake Silicone Mold - Round 6-Cavity
$16.50
Meile Childhood Sponge Stamp Set - Kids' Paint Printing Tools with Sponge Brushes for Kindergarten Art
$14.30
2019 Jiangxi Isuzu Ruimai Lingtuo DMAX - Brand New Original Thickened Wear-Resistant Tires
$302.80
Pirelli P7 Run-Flat Tires 225 245 255 275 35 40 45 50 R17 18 19 20 21
$340.00
Lint-Free Industrial Wiping Cloth - Oil-Removing Absorbent Paper for Car Paint Wax and Grease Removal
$123.00
Henkel Loctite 495 Adhesive Genuine 401 406 416 460 496 Instant Glue Strong Industrial Adhesive for Metal and Plastic
$6.00
Industrial Ultrasonic Emulsification and Dispersion System - Anti-Foam Vibration for Pipeline Inner Wall Cleaning
$31,250.00
Commercial Small Electric Food Warmer Display Case for Fried Chicken, Burgers, Pies, Egg Tarts, and Youtiao - Constant Temperature Heating Cabinet for Breakfast
$623.00
Universal Triangular Stand for Mineral Water Bottles – Inverted Dispenser Rack for Water Coolers and Bottled Water Extraction
$5.10
Manufacturer Supply By-Product Cleaning Equipment, Fully Automatic Cylindrical Pig Tripe Degreaser and Cleaner for Cattle and Sheep Stomachs
$1,600.00
CANDLE.LAB | DIY Aromatherapy Candle Supplies, Natural Refined White Beeswax Pellets, Handmade Soap Materials #27
$9.00
![No-Shave Hair Transplant by Yongxiang Dean Team [Premium Customization], Unlimited Graft Count, Pain Management for Transplant Area](https://www.gosteppe.com/cache/small/product/269234/legacy-main-b28b879c33f1fe08b5eba226.webp)
No-Shave Hair Transplant by Yongxiang Dean Team [Premium Customization], Unlimited Graft Count, Pain Management for Transplant Area
$200,000.00
Kitchen Sink Drainage Mat - Sloped Countertop Drying Pad with Foldable Narrow Edges, Faucet Splash Guard, Storage Mat
$3.57
UE5 Unreal Engine 5.2-5.7 Physical Assembly System Physics Plugin
$0.50
![[Damai Holds Micro-Needle Hair Transplant Patent] Female Hairline | Non-Shaven Transplant 1000 Units | Forehead](https://www.gosteppe.com/cache/small/product/269231/legacy-main-b004541637d9aaa9d8c19288.webp)
[Damai Holds Micro-Needle Hair Transplant Patent] Female Hairline | Non-Shaven Transplant 1000 Units | Forehead
$17,000.00
Air Baffle for ABB ACS550-X2 R8 IP21 VFD
$3,450.00
Outdoor Waterproof Shockproof EDC Storage Box, Sealed Gear Case for Small Items
$5.10
Zhizhi Lin Zexu Small Regular Script Diamond Character Card Kaishu Copybook Porcelain Blue Gold Characters Brush Calligraphy Practice Folding Card
$68.00
Maotaizi Dual-Tip Dual-Color Glitter Markers for Kids - Non-Toxic Soft Tip Colored Pens for Elementary Art
$16.90
Tire Removal Socket Wrench and Spare Tire Tool Kit for Zhengzhou Nissan Paladin, Aoting, and Dongfeng Ruiqi Pickup Trucks
$16.90
Zhimo Ke Xingkai Technique Calligraphy Copybook - Upgraded Edition with Text, Images, and Video Tutorials for Beginners
$30.60
Small-Scale Yogurt Processing Production Line, Blended Yogurt Fermentation Equipment, Organic Milk Filling Machine
$115,920.00
Compact Manual Hot Stamping Machine for Logos, Business Cards, Leather Wallets, Plastic, and Wood - Heat Embossing and Branding Tool
$500.76
DIY Handmade Soap Mold – Single Square Silicone Mold for Homemade Soap
$1.96
Wall-Mounted Facial Towel Dispenser Transparent Upside-Down Design
$4.50
Colorful Ground Thread Inserts 16ER/IR1.0/2.0/3.0/3.5 ISO AG55/60 for High-Hardness Quenched Steel
$19.80
Jiuzheng Tongming Submerged Solenoid Pulse Valve TMF-Y-25/40/50/62/76S, Dust Removal Pulse Blowing Valve
$150.00
Large Water Bucket Stand – Storage Rack for Office Purified Water Dispensers and Mineral Water Containers
$282.56
Double Loop Chain Lifting Sling, Manganese Steel Double-End Ring Hoisting Chain, G80 Manganese Steel Lifting Rigging 1/2/3/5T
$98.00
Hesdige JG-376 Portable Stone Removal Hook - Multi-Function Tool for Cleaning Gravel from Car Tire Treads
$16.91
![[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)
