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Grove - Water Sensor

Grove - Water Sensor

  • Brand: Seeedstudio
  • Product Code: GRV-WATER
  • Availability:
  • Warranty Period: 12 months
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  • $3.25
  • Ex Tax: $3.25
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This sensor works by having a series of exposed traces connected to ground and interlaced between the grounded traces are the sens traces. The sensor traces have a weak pull-up resistor of 1 MΩ. The resistor will pull the sensor trace value high until a drop of water shorts the sensor trace to the grounded trace.

For all Grove users (especially beginners), we provide you guidance PDF documents. Please download and read through Preface - Getting Started and Introduction to Grove before your use of the product.

Believe it or not, this circuit will work with the digital I/O pins of your Arduino or you can use it with the analogue pins to detect the amount of water induced contact between the grounded and sensor traces. Suitable to detect rainfall, tank overflow, water leakage.

You can get grove HAT for Raspberry Pi here or if you want to use this module with Arduino board, you can get grove shield for Arduino here.

You can also get the grove wrapper for a tidier and nice presentation  of the project:

Get the compatible Grove Wrapper here:

Note: Controllers are not included.


  • Grove compatible interface
  • Low power consumption
  • 2.0cm x 2.0cm twig module
  • High sensitivity
  • Can be use for rainfall detecting, liquid leakage, tank overflow detector


  • Working Voltage: 4.75V to 5.25V
  • Current: <20mA
  • Working Temperature: 10℃ to 30℃
  • Working Humidity (without condensation): 10% to 90%
  • Dimensions: 40mm x 20mm x 12mm

Packing List:

  • 1 x Grove - Water Sensor 
  • Grove 4 Pin Buckled 20cm Cable


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2021 PB Connector Header (S) 4 ways is suitable for me to connect the sensor to the breadboard? ( WONG, 09/03/2016 )

Hi. It may not be suitable because the length of the pin is not enough and pitch of the connector also not same as breadboard. Thanks. :)

Can this sensor work with PIC18F4550? Is it possible to connect 3 sensors at the same time for detecting different water level? Any circuit diagram that I can refer to? Thank you. ( Chong Chui Fun, 01/12/2015 )

Hi. Yes. This sensor can work with PIC18F4550 and possible to connect three sensors at the same time. For further inquiry please do continue the discussion in our technical forum as this session is only for short inquiry. Thanks. :)

Can we connect it to arduino microcontroller ? What are other components? ( Adam, 21/10/2015 )

Hi. Yes, you can connect it to Arduino microcontroller. You can check out this tutorial. Thanks. :)

can i know the circuit connection of this water sensor to pic16f877a ? ( Illuni, 15/10/2015 )

Hi, there are four pins on the sensor board. For the circuit connection to PIC16F877A, you will use three pins which are VCC, GND and Signal. The connection is: VCC -> 5V, GND -> GND, SIG -> any analog or digital pin (eg. RB0-RB7, RA0-RA3) . If you have further inquiry, please do discuss in our technical forum / facebook group as this section is for short inquiry, thanks :)

Can this sensor connect to dc motor? ( Haikal, 23/01/2015 )

Direct connection? I guess is NO. There should be a microcontroller to read the sensor and control the motor via motor driver.

is it possible for me to connect this sensor with PIC 16F877A? ( Shyuan, 22/01/2015 )

Yes, the output is basically analog voltage, you can connect to any microcontroller that has ADC input, including PIC16F877A. If you have further inquiry, please do discuss in our technical forum as this section is for short inquiry, thanks :)

is it possible for me to connect this sensor with a 555 timer circuit.... ( ravi, 21/01/2015 )

Not really sure, we have yet to try it. But basically it is a voltage divider. If you have further inquiry, please do discuss in our technical forum as this section is for short inquiry, thanks :)

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  • 5 out of 5
Total Reviews (8)
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Tags: GROVE, Water Sensor, Rain Sensor, SeeedStudio, 101020018