Analog Water Level Sensor
Analog Water Level Sensor - Image 2
Analog Water Level Sensor - Image 3

Analog Water Level Sensor

₹100.00

Overview

The Analog Water Level Sensor (Rain/Liquid Level Depth Sensor) is an easy-to-use, cost-effective electronic component designed to detect water presence, measure droplet density, and determine liquid level depth. It operates using resistive trace detection across ten exposed, interleaved copper traces on the sensor PCB.

When submerged or exposed to water droplets, the conductive nature of water bridges the gap between adjacent interleaved traces, acting as a variable resistor. The level of water directly affects the overall electrical resistance: a higher water depth or greater surface immersion results in lower resistance and a higher output voltage at the signal pin (S). An onboard S8050 NPN transistor acts as an amplification/buffering driver, providing a smooth analog voltage signal suitable for microcontrollers like Arduino, ESP32, and Raspberry Pi.

Key Components Identified On Module:

• Interleaved Copper Traces: 10 parallel exposed traces (5 power, 5 signal) for conductive sensing.

• S8050 NPN Transistor: Amplifies weak currents passing through water for reliable analog signal readings.

• Power LED Indicator: Provides visual confirmation when power (VCC and GND) is supplied to the module.

• 3-Pin Header Interface: S (Signal / Analog Output), + (VCC / Power 3.3V–5V), – (GND / Ground).
Categories: ,

Description

Technical Specifications

Parameter / Specification Value / Details
Operating Voltage 3.0V – 5.0V DC
Operating Current Less than 20 mA
Sensor Type Analog Resistive Liquid Level / Rain Sensor
Detection Area 40 mm x 16 mm
Working Temperature 10°C to 30°C (14°F to 86°F)
Operating Humidity 10% to 90% non-condensing
Output Signal Analog voltage (0V to VCC proportional to immersion depth)
Dimensions 62 mm x 20 mm x 8 mm
Weight Approx. 3.5 grams

 

Pin Configuration & Interface

Pin Marking Pin Name Description & Microcontroller Wiring
S Signal Output Analog output pin; outputs 0V when dry, increasing up to VCC as water level covers the trace area.
+ VCC Power Power supply input (connects to +3.3V or +5V DC).
– GND Ground System ground connection (0V).

 

Applications and Key Uses

  • Water Level Monitoring in Tanks & Reservoirs: Placed vertically inside small water tanks, aquariums, or sump pits to measure water depth or detect overflow conditions.
  • Rainfall Detection & Weather Stations: Mounted horizontally or at a slight tilt outdoors to sense precipitation, measure rain intensity, or automatically trigger window closing systems.
  • Smart Agriculture & Irrigation Systems: Monitors soil moisture runoff, irrigation channel levels, or water storage to trigger automated pump control.
  • Leak Detection & Flood Warning Systems: Placed near appliances (washing machines, water heaters, basements) to trigger alarms or cut off power/water valves upon detecting leakages.
  • DIY Electronics & STEM Educational Projects: Widely used in microcontroller experiments (Arduino, ESP32, STM32) to teach analog-to-digital conversion (ADC), threshold triggering, and sensor interfacing.

Practical Considerations & Limitations

  • Low Cost & High Sensitivity: Provides rapid response to water immersion with minimal setup.
  • Pure Water Conductivity Note: Operates on electrical conductivity; distilled or ultra-pure water with zero ion content may yield weak readings.
  • Corrosion Prevention: Continuous DC power to traces in water causes electrolysis and rapid oxidation. To extend lifespan, power the VCC pin via a digital GPIO pin only when reading, rather than continuously.
  • Protection: Only the bottom trace portion (below the transistor) should be submerged. The upper electronic components (transistor, LED, headers) must remain dry.

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Analog Water Level Sensor

₹100.00