Grove - TDS Sensor/Meter For Water Quality (Total Dissolved Solids)


An Arduino-compatible TDS(Total Dissolved Solids) sensor/meter for measuring TDS levels in water to indicate the water quality. It can be implemented in fields such as homemade water filter, hydroponics, aquarium and others related to testing water quality.

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Concerned about your water quality? Why not make yourself a TDS meter to monitor water quality to tell you whether the water meets standards of drinking! 


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This product can also be compatible with Raspberry Pi Series with the help of 4-Channel 16-Bit ADC For Raspberry Pi (ADS1115)!


  • Analog Signal, easy to implement
  • Support 3.3/5V Input Voltage
  • Good Arduino Compatibility, where 0 ~ 2.3V Output Voltage can be easily implemented in 3.3/5V control system
  • Waterproof TDS Probe


The Grove - TDS Sensor detects the Total Dissolved Solids (TDS) levels in the water which can be used to indicate the water quality. The Grove - TDS Sensor can be applied in water quality applications such as TDS meter, well water, aquarium, hydroponics, etc.


It supports 3.3/5V input voltage and 0 ~ 2.3V Output Voltage making it easy to be compatible with all Arduino Boards. The sensor also provides a waterproof probe, making the testing process much easier to handle.


What is TDS and why should you care

TDS = Total Dissolved Solids, is a measure of the dissolved combined content of all inorganic and organic substances present in water. Typically, the higher the TDS value, the more substances dissolved in water. Hence, higher levels of Total Dissolved Solids (TDS) can indicate that water has more contaminants that can pose health risks.

 TDS Water Levels


  • TDS meter/TDS tester
  • Swimming pool
  • Aquarium
  • Well water
  • Hydroponics



Grove - TDS Sensor

  • Input Voltage: 3.3/5V
  • Output Voltage: 0 ~ 2.3V
  • Working Current: 3 ~ 6mA
  • TDS Measurement Range: 0 ~ 1000ppm
  • Power indication LED
  • Connection Interface: Grove 4-Pin / XHB 2.54mm 2P
 Waterproof Probe
  • Cable Length: 60cm
  • Connection Interface: XHB 2.54mm 2P


Hardware Overview

Grove - TDS Sensor Hardware Overview


  • The Waterproof TDS probe cannot be used in water above 70°C.
  • The sensor cannot be used to measure flowing water.
  • The sensor cannot be used to measure water with high pollution concentration.
  • The Grove sensor itself is not waterproof.

Part List

  • Grove - TDS Sensor x 1
  • 20cm Grove Cable x 1
  • Waterproof TDS Probe x 1


Dimensions 20 x 40 cm
Weight 0.025


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Grove - TDS Sensor

This is the wiki page for this product, which will show you how to use the product, as well as details about the software and hardware.

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Product Faqs

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  • Will it work with raspberry pi specifically with grove raspberry pi HAT?
    Question by: Ajay Gore on 2020-01-27 08:01:17
  • As this sensor is non-isolated it will present an issue with multiple other sensors on the same circuit in the same aqueous solution affecting all measurements, correct?
    Question by: Andrew Leckie on 2020-01-26 22:29:17