Description
Product Overview
Elevate your next IoT or automation project with the HW-038 Water Level Sensor Module. Designed for ease of use and high reliability, this module is the perfect solution for measuring water depth, detecting rainfall, or monitoring liquid leaks.
The sensor works by exposing a series of parallel traces to water droplets. The water bridges these traces, varying the resistance and providing an analog signal that can be easily read by microcontrollers like Arduino, ESP8266, Raspberry Pi, and STM32.
Key Features
- High Sensitivity: Optimized trace spacing allows for accurate detection of even small amounts of liquid.
- Analog Output: Provides a variable voltage signal directly proportional to the water level.
- Low Power Consumption: Ideal for battery-operated weather stations or plant monitoring systems.
- Easy Interface: Simple 3-pin header (Signal, VCC, GND) for plug-and-play connectivity.
- Compact Design: Small footprint allows for integration into tight enclosures.
Common Applications
This versatile sensor is widely used in:
- Automatic smart gardening and plant watering systems.
- DIY Weather stations (Rainfall detection).
- Basement flood alarms and leak detection.
- Tank level monitoring (Sumps, aquariums).
Technical Specifications
| Specification | Details |
|---|---|
| Operating Voltage | 3.3V to 5V DC |
| Operating Current | < 20mA |
| Sensor Type | Resistive / Analog |
| Detection Area | 40mm x 16mm (approx.) |
| Operating Temperature | 10°C to 30°C |
| Pinout | S (Signal), + (VCC), – (GND) |
Note: While this sensor is water-resistant, only the probe area should be submerged. Do not submerge the electronic components at the top of the module.









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