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Seeed Studio Grove TDS sensor module with waterproof probe and Grove connector

Seeed Studio

Seeed Studio Grove TDS Sensor 0-1000ppm 0-2.3V 3.3/5V

SKU CH-MMF6-96B55

Measures total dissolved solids from 0 to 1000 ppm with a waterproof probe and 0–2.3 V output for 3.3 V or 5 V systems

  • TypeSensors
  • Measures water purity up to 1000 ppm for accurate quality checks
  • Waterproof probe resists corrosion during repeated immersion testing
  • Analog 0–2.3 V output integrates directly with 3.3 V and 5 V controllers
  • Grove unified socket enables plug-and-play connection without wiring
  • Part of a 400-module ecosystem for rapid prototyping expansion

Grove TDS Sensor — 0–1000 ppm

This Grove module measures Total Dissolved Solids in water to indicate water quality. It suits hobbyists, educators and prototype builders working on aquarium monitors, hydroponic systems or well-water testing rigs. The sensor plugs directly into the Grove unified socket for immediate integration with Arduino-compatible boards. No soldering or extra wiring is required to start logging readings.

Measurement range and voltage headroom

The probe covers 0–1000 ppm with an analog output that spans 0–2.3 V, leaving headroom below the 3.3 V or 5 V supply rails used by most microcontrollers. Readings stay linear across the specified range, but the sensor cannot resolve concentrations above 1000 ppm or produce voltages beyond 2.3 V. Users needing higher salinity or industrial-grade precision will need a different instrument.

Build integration and system fit

The waterproof probe survives immersion without rapid corrosion, while the Grove connector eliminates custom cabling and frees GPIO pins for other peripherals. The board operates from either 3.3 V or 5 V logic, so it fits both classic and modern Arduino form factors without level-shifting circuitry. Buyers who require digital protocols such as I²C or SPI, or who need to log data without a host microcontroller, should look elsewhere.

Highlights

  • Measures water purity up to 1000 ppm for accurate quality checks
  • Waterproof probe resists corrosion during repeated immersion testing
  • Analog 0–2.3 V output integrates directly with 3.3 V and 5 V controllers
  • Grove unified socket enables plug-and-play connection without wiring
  • Part of a 400-module ecosystem for rapid prototyping expansion

Specifications

TypeSensors

Questions about this item

Will the 0-2.3V output work with my older 5V Arduino board?

Yes, the sensor supports both 3.3V and 5V input and its 0-2.3V analog output stays within the ADC range of 5V boards, so it connects directly to an older Arduino without level shifting.

How can I verify the sensor is reading correctly after wiring it to my Grove shield?

Immerse the waterproof probe in a known calibration solution or distilled water, then check that the analog voltage on the Grove pin falls within the expected 0-2.3V span for the 0-1000ppm range.

Does the package include a Grove cable or do I need to buy one separately?

The sensor has a Grove unified socket for plug-and-play use; a compatible Grove cable is required to connect it to a shield or board and is not included in the box.

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