Gravity: Analog TDS Sensor/ Meter For Arduino - DFRobot

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  • Gravity: Analog TDS Sensor/ Meter for Arduino
Overhead shot of a small TDS sensor module with red LED, wires, and power connector for Arduino-DFRobot product sku:SEN0244 image.Front shot of TDS sensor for Arduino, used in water quality testing and homemade filters.Front view of TDS sensor for water quality testing with Arduino compatibilityAngled shot of Arduino TDS sensor for water quality testingAngled shot of Arduino TDS Meter measuring water quality with analog sensor for home filtration and aquarium use. Gravity: Analog TDS Sensor/ Meter for Arduino $11.80 SKU: SEN0244 - + Volume Discount
  • $11.40 3+ items
  • $11.20 5+ items
  • $10.80 10+ items
Arduino-compatible TDS meter kit measures water cleanliness, supports 3.3-5.5V input, and offers easy DIY water quality projects with a waterproof probe. Purchase this product and earn 118 reward points, which are tied to VIP membership program. Learn More > IntroductionFeaturesSpecificationDocumentsShipping List Resource FAQ Review

Introduction

Gravity: Analog TDS Sensor/Meter for Arduino is an Arduino-compatible TDS Meter Kit for measuring TDS value of the water, to reflect the cleanliness of the water. TDS meter can be applied to domestic water, hydroponic and other fields of water quality testing.

TDS (Total Dissolved Solids) indicates that how many milligrams of soluble solids dissolved in one liter of water. In general, the higher the TDS value, the more soluble solids dissolved in water, and the less clean the water is. Therefore, the TDS value can be used as one of the references for reflecting the cleanliness of water.

(Cited from Google)

For this application, we have launched an analog TDS sensor kit that is compatible with Arduino, plug, and play, easy to use. Matching with Arduino controller, you can build a TDS detector easily to measure the TDS value of liquid.

This tds sensor supports 3.3 ~ 5.5V wide voltage input, and 0 ~ 2.3V analog voltage output, which makes it compatible with a 5V or 3.3V control system or board. The excitation source is an AC signal, which can effectively prevent the probe from polarization and prolong the life of the probe, meanwhile, increase the stability of the output signal. The TDS probe is waterproof, it can be immersed in water for a long time measurement.

This tds meter can be used in water quality application, such as domestic water, hydroponics. With this product, you can easily DIY a TDS detector to reflect the cleanliness of water to protect your health.

Attention: 1.The probe can not be used in water above 55 degrees centigrade. 2.The probe can not be left too close to the edge of the container, otherwise, it will affect the reading. 3.The head and the cable of the probe are waterproof, but the connector and the signal transmitter board are not waterproof. Please be careful.

Features

  • Wide Voltage Input: 3.3~5.5V
  • Good Compatibility Output: 0~2.3V analog signal output, compatible with 5V or 3.3V controller
  • AC Excitation Source: effectively prevent the probe from polarization
  • Waterproof Probe
  • Easy to Use: Arduino compatible, simple connection, plug, and play without soldering

    • Specification

    Signal Transmitter Board
  • Input Voltage: 3.3 ~ 5.5V
  • Output Voltage: 0 ~ 2.3V
  • Working Current: 3 ~ 6mA
  • TDS Measurement Range: 0 ~ 1000ppm
  • TDS Measurement Accuracy: ± 10% F.S. (25 ℃)
  • Module Size: 42 * 32mm
  • Module Interface: PH2.0-3P
  • Electrode Interface: XH2.54-2P
    • TDS probe
  • Number of Needles: 2
  • Total Length: 83cm
  • Connection Interface: XH2.54-2P
  • Color: Black
  • Other: Waterproof Probe

    • Documents

  • Product wiki
  • Schematic
  • Layout with Dimension
  • CD4060BM96 Datasheet
  • LMV324A-SR Datasheet
  • DFRobot Gravity TDS Sensor Library(Github)

    • Shipping List

  • Analog TDS Meter for Arduino x1
  • Waterproof TDS Probe x1
  • 3Pin Analog Sensor Cable x1

    • Resource

    AllProjectsBlogTutorialCourseMedia TDS Sensor and ESP32 IoT based Water Quality Monitoring system, IoT TDS sensor, ESP32 TDS Sensor

    Projects TDS Sensor and ESP32 IoT based Water Quality Monitoring system, IoT TDS sensor, ESP32 TDS Sensor

    Electronic Clinic Mar 15, 2020 TDS Sensor & Arduino Interfacing for Water Quality Monitoring

    Projects TDS Sensor & Arduino Interfacing for Water Quality Monitoring

    Mamtaz Alam Aug 22, 2022 Arduino Hydroponics, DIY Hydroponics System using pH Sensor & EC Sensor, Hydroponic

    Projects Arduino Hydroponics, DIY Hydroponics System using pH Sensor & EC Sensor, Hydroponic

    Electronic Clinic Mar 22, 2021 Gravity Liquid Sensor Selection Guide

    Blog Gravity Liquid Sensor Selection Guide

    DFRobot Dec 28, 2019 Experience the Power of IoT: A Tour of Our Smart City Project

    Projects Experience the Power of IoT: A Tour of Our Smart City Project

    portrait Danli Nov 08, 2024 Hydroponics Simulation Model

    Projects Hydroponics Simulation Model

    portrait RosarIoT Feb 24, 2023 More

    FAQ

    Does this sensor have a temperature sensor? How to make the temperature compensation?

    Explore More Related Questions >

    Review

    Alberto. Nov 08, 2025

    Excelente producto! Full recomendado No tengo quejas

    Muhammad Fadil.Huseiny Nov 05, 2025

    Good working stable as intended

    Muhammad Fadil.Huseiny Oct 30, 2025

    Really Good, product working well

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