Water Level Detection Sensor Module
Water Level Detection Sensor Module
Water Level Detection Sensor Module
Water Level Detection Sensor Module
Water Level Detection Sensor Module
Water Level Detection Sensor Module
Water Level Detection Sensor Module
Water Level Detection Sensor Module
Water Level Detection Sensor Module
Water Level Detection Sensor Module

Water Level Detection Sensor Module

Sensors
DET527
€2.95
In Stock
Immediate Dispatch
Water Level Detection Sensor Module for Arduino and microcontrollers — detects water presence and measures depth via exposed parallel traces acting as a variable resistor. Ideal for rain detection, tank monitoring, and flood alert systems.

 

The Water Level Detection Sensor Module is a compact, easy-to-use sensing solution designed to detect and measure the presence or depth of water. Based on the principle of parallel exposed conductive traces that act as a variable resistor, the module outputs a signal that changes proportionally to how much of the sensing area is submerged — the more water contact, the lower the resistance and the higher the output signal. Compatible with Arduino, ESP32, Raspberry Pi, and virtually any microcontroller platform, it bridges real-world water conditions with digital control logic.

Key Features

  • Variable Resistor Sensing: Parallel exposed traces change resistance with water coverage → proportional analog output reflecting actual water level
  • Simple 3-Pin Interface: Power, Ground, and Signal — plug directly into any analog input → zero external components needed
  • Low Power Design: Suitable for battery-powered and always-on monitoring applications → energy-efficient deployments
  • Compact Form Factor: Small PCB fits inside enclosures, tanks, or weather stations → versatile physical integration
  • Broad Platform Compatibility: Works with 3.3 V and 5 V systems → use with Arduino UNO, ESP32, Raspberry Pi, and more

Pinout & Wiring

PINSymbolDescription
1S (SIG)Analog signal output — connect to analog input pin of microcontroller
2+Power supply — connect to 3.3 V or 5 V
3G (GND)Ground — connect to system ground

Wiring note: Connect the S pin to an analog input (e.g., A0 on Arduino UNO). Read the analog value in your sketch — higher readings indicate more water contact. It is recommended to power the sensor only when taking a reading to reduce electrolytic corrosion of the traces over time.

Compatibility

  • Arduino UNO / Nano (5 V): Direct connection to 5 V and GND; read analog value on any A-pin.
  • ESP32 / ESP8266 (3.3 V): Connect to 3.3 V rail; use 3.3 V-tolerant analog input to avoid damage.
  • Raspberry Pi (3.3 V): Requires an ADC (e.g., MCP3008) since Raspberry Pi lacks native analog inputs.

Typical Applications

  • Rain Detection Systems: Mount the sensor exposed to the sky — any rainfall triggers an alert via Arduino or ESP32, perfect for automated window closers or weather stations.
  • Tank Level Monitoring: Automate pump activation or shut-off based on measured water depth inside a reservoir or cistern.
  • Flood Early Warning: Place at floor level or in a basement to detect rising water and trigger an alarm or notification.
  • Smart Irrigation Control: Detect rain or soil surface moisture to prevent over-watering in automated garden systems.
  • Aquarium & Hydroponics: Monitor water level in fish tanks or hydroponic trays and alert when refilling is needed.

Technical Specifications

ParameterValue
InterfaceAnalog
Operating Voltage3.3 V – 5 V DC
OutputAnalog voltage proportional to water level
Sensing PrincipleParallel exposed conductive traces (variable resistance)

FAQ

Q: Can the sensor be left permanently submerged?
A: It is not recommended for continuous submersion. Power the sensor only during measurement cycles to minimise electrolytic corrosion of the exposed traces and extend its lifespan.

Q: Does it give a digital (wet/dry) or analog (depth) output?
A: The raw output is analog — the voltage level varies with submersion depth. You can add a threshold in your code to treat it as a digital wet/dry signal, giving you the best of both worlds.

Package Contents: 1 × Water Level Detection Sensor Module

⚠ Note: Only the sensing area (lower portion of the PCB) should be exposed to water. Keep the electronic components and connector dry at all times to avoid damage.
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