Dongguan Uchi Electronics Co.,Ltd.

Manufactuer of varistor,temperature sensor,thermistor,fuse and resistor !

About Us
Factory Tour
Quality Control
Contact Us
Request A Quote
Home ProductsNTC Temperature Sensor

High Sensitivity Water Level Sensor Module For Arduino AVR ARM STM32 ST Depth of Detection

Good communication. Will buy from again !

—— Mark Kim

Professional & Patient Sales ,fair transaction

—— Penka Kalacheva

Reliable partner, worth being go on cooperation !

—— Rakesh Saini

I'm Online Chat Now

High Sensitivity Water Level Sensor Module For Arduino AVR ARM STM32 ST Depth of Detection

Large Image :  High Sensitivity Water Level Sensor Module For Arduino AVR ARM STM32 ST Depth of Detection

Product Details:

Brand Name: UCHI
Model Number: HY-027(A)

Payment & Shipping Terms:

Minimum Order Quantity: 1000 PCS
Price: Negotiable
Packaging Details: Bulk
Delivery Time: 2 Weeks
Payment Terms: T/T
Supply Ability: 1,000,000 PCS/Month
Detailed Product Description
Product Name: Water Level Sensor Power: +3.0V -5.5V
Signal Type: Analog Signal Connector: XH2.54 × 3
Pin: S-Signal,V-Power,G-Ground Working Voltage: DC5V
Work Current: Less Than 35mA Working Moisture: 10%-90% Without Condensation


High Sensitivity Water Level Sensor Module For Arduino AVR ARM STM32 ST Depth of Detection



Quick details

Operating voltage: DC 3-5V, < 20mA
Applications :Rainfall detecting,Liquid leakage,Tank overflow detector
Judge the water level through with a series of exposed parallel wires stitch to measure the water droplet/water size .






This module with small size and high cost-effective is easy to use.In this article, we will use the digital storage oscilloscope to show you how the output voltage change with the immersion depth.What's more,we will show you an interesting actual application case.You will have a clear idea of how this module to realize the function of water level alarm.

This module is designed mainly for the DIY hobbyist and provide them a low-cost and easy-to-use water level detection scheme.The stability and durability of this module can not reach the industrial standard.But we use the high-quality PCB board to improve its stability and durability.If you just want to DIY for fun, this module will be a good choice.


Features: Simple ,Easy to use,Small size,Light, High Cost-Effective

Applicable Occasion:Water level alarm design




Name:Water Level Sensor
Power:+3.0V -5.5V
Signal Type:Analog signal
Connector: XH2.54 × 3
Pin :S-Signal,V-Power,G-Ground
Instructions for use: The water level can be known by judging the output bit analog quantity.



Functional Introduction:


Functional Test

  • Testing environment:barreled pure water
  • Testing procedures:
  • Connect the module to 5V power supply
  • Put the module to into the pure water
  • Observe the connection depth between the immersion depth and the output voltage of AO end.

Actual testing results

Actual application case

Use this water level sensor module to control on or off about the LED which is on the arduino board


  • arduino uno
  • Pin Header
  • Dupont Cable

When the immersion depth of the module does not reach the setting value,LED on P13 of arduino board is not bright.



How to use a water level sensor module with Arduino


Continuing with sensors that can be used in aquaponics, hydroponics systems or automatic outdoor plant care, we will explain how to use a water level sensor to control the amount of water we have in a tank. The same sensor can also be used to detect if it is raining.




This sensor is supplied to 5V or 3.3V on VCC and GND pins. The pin S will give us an analog value between VCC and GND. So we will use the S pin as analog input connecting Arduino, the value read will be higher depending on the sensor surface is covered with water. This is because the water acts as a conductor, given that the water we use in our deposits not be pure water (H2O), since if water is nonconductive. But rarely we will use this type of sensors to measure the water level in a tank of pure water.


Power supply 3,3V ~ 5V
Current < 20mA
Humidity sensitivity range 10% ~ 90%
Pinout +: VCC
-: GND
S: Analog output



Use as a level in a tank

To use it as level detector in a deposit have to install the sensor on the inside of the tank at the level where we want to control the water level. The sensor must be positioned so that parallel lines are perpendicular to the sensor water level. The pin S will give us a greater value as the sensor is immersed.



Use as rain detector

To detect whether it is raining with this sensor have to position it horizontally so that rain falling on the sensor, as raindrops fall on the sensor film of water on the surface will be formed by increasing the value of the pin S, this how we can deduce if it is raining.




In both cases we can use the same code, because it simply will be responsible for reading the analog value of S. pin up to us to interpret the measures we are taking.


const int analogInPin = A0;
int sensorValue = 0;
void setup() {
void loop() {
sensorValue = analogRead(analogInPin);
Serial.print("Sensor = " );



(1) did not carefully read the instructions before you do not give the driver board is powered !
Avoid faulty wiring caused permanent damage to the drive plate .
(2 )Please carefully check pin function , attention condensed identifier , correct wiring ! Do not
reverse the power cord , resulting in electronic devices burned.

Contact Details
Dongguan Uchi Electronics Co.,Ltd.

Contact Person: Anna

Send your inquiry directly to us Message not be empty!