---
product_id: 247081258
title: "Gravity: Analog TDS Meter Sensor Kit for Arduino - 83cm Waterproof Probe with Anti-Polarization Design, 0-1000ppm ±10%, Water Quality Testing for Hydroponics/Aquarium/Home"
brand: "dfrobot"
price: "¥6288"
currency: JPY
in_stock: true
reviews_count: 3
category: "Df Robot"
url: https://www.desertcart.jp/products/247081258-gravity-analog-tds-meter-sensor-kit-for-arduino-83cm-waterproof
store_origin: JP
region: Japan
---

# Waterproof Probe: Yes TDS Range: 0~2000 ppm Output: 0~2.3V analog Gravity: Analog TDS Meter Sensor Kit for Arduino - 83cm Waterproof Probe with Anti-Polarization Design, 0-1000ppm ±10%, Water Quality Testing for Hydroponics/Aquarium/Home

**Brand:** dfrobot
**Price:** ¥6288
**Availability:** ✅ In Stock

## Summary

> 💡 Dive into Precision: Measure Water Quality Like a Pro!

## Quick Answers

- **What is this?** Gravity: Analog TDS Meter Sensor Kit for Arduino - 83cm Waterproof Probe with Anti-Polarization Design, 0-1000ppm ±10%, Water Quality Testing for Hydroponics/Aquarium/Home by dfrobot
- **How much does it cost?** ¥6288 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/247081258-gravity-analog-tds-meter-sensor-kit-for-arduino-83cm-waterproof)

## Best For

- dfrobot enthusiasts

## Why This Product

- Trusted dfrobot brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Plug-and-Play Design:** No soldering required—just connect and start measuring!
- • **Compact & Lightweight:** Weighing only 30g, it’s perfect for portable projects.
- • **Comprehensive Support:** Access detailed tutorials and customer service for a smooth experience.
- • **Advanced AC Excitation:** Prevents probe polarization for accurate and reliable readings.
- • **Seamless Compatibility:** Easily integrates with both 5V and 3.3V controllers for versatile applications.

## Overview

The Gravity Analog TDS Sensor for Arduino is a cutting-edge tool designed to measure total dissolved solids in water. With a waterproof probe and a user-friendly plug-and-play setup, this sensor is perfect for both hobbyists and professionals looking to ensure water quality. Compatible with various Arduino controllers, it offers a reliable output signal and comes with extensive support resources.

## Description

INTRODUCTION 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. TDS pen is a widely used equipment to measure TDS value. The price is affordable, and it is easy to use, but it is not able to transmit data to the control system for online monitoring to do some water quality analysis. The professional instrument has high accuracy and can send data to the control system, but the price is expensive for the ordinary people. To this end, we have launched an analog TDS sensor kit which 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. 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 probe from polarization Waterproof Probe 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 Interface: PH2.0-3P Electrode Interface: XH2.54-2P TDS probe Number of Needle: 2 Total Length: 83cm Connection Interface: XH2.54-2P Other: Waterproof Probe

Review: Know the mysteries of thine water! - I wonder things, such as ash or bad rain, wouldst alter the water herein, that lieth await of measure. The "sensors", purchased from those of yonder great rainforest, have arrived. Doeth having so much waiste change our waters in ways we cannot imagine, yet may still divine? Valuing my fish and their health perhaps more than I do you and yours, reader, I shall not at mine own hand test these hypotheses. I shall defer to expert authority. Yet I would still measure, and have a little bird tell me in mine ear when such measures ring warning.
Review: Great budget sensor - This is a pretty good budget EC sensor for small experiments. EC/TDS are highly dependent on water temperature so it would have been nice to have a DS18B20 included in the kit. There is a bit of extra calibration required so be prepared to do a little math when you hook this thing up. Luckily, the code samples were very useful and provided accurate readings when calibrated to the correct K value. This is perfect for my project right now, but I’m probably going to upgrade very, very soon... I’ll need a higher range beyond 1000ppm in the late summer.

## Features

- Accurate Water Purity Measurement: Measures TDS levels (0-1000ppm ±10% accuracy) to monitor dissolved solids in drinking water, hydroponics, and aquariums, solving the data-logging limitations of basic TDS pens
- Easy to Use: simple connection via Gravity 3-pin interface, plug and play without solderin with sample code
- Good compatibility: 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
- NOTE: While the TDS probe tip and cable are waterproof and submersible, the connection interface and signal converter board are NOT waterproof. Avoid exposing these components to water during use

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B086GX2539 |
| Best Sellers Rank | 64,205 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 112 in Lab pH Meters |
| Brand | DFRobot |
| Country Of Origin | China |
| Customer Reviews | 3.8 out of 5 stars 23 Reviews |
| Manufacturer | DFROBOT |
| Manufacturer Part Number | SEN0244 |
| Model Number | SEN0244 |

## Images

![Gravity: Analog TDS Meter Sensor Kit for Arduino - 83cm Waterproof Probe with Anti-Polarization Design, 0-1000ppm ±10%, Water Quality Testing for Hydroponics/Aquarium/Home - Image 1](https://m.media-amazon.com/images/I/6192ip0BC4L.jpg)
![Gravity: Analog TDS Meter Sensor Kit for Arduino - 83cm Waterproof Probe with Anti-Polarization Design, 0-1000ppm ±10%, Water Quality Testing for Hydroponics/Aquarium/Home - Image 2](https://m.media-amazon.com/images/I/61lMgo3YevL.jpg)
![Gravity: Analog TDS Meter Sensor Kit for Arduino - 83cm Waterproof Probe with Anti-Polarization Design, 0-1000ppm ±10%, Water Quality Testing for Hydroponics/Aquarium/Home - Image 3](https://m.media-amazon.com/images/I/61wL3GM77iL.jpg)
![Gravity: Analog TDS Meter Sensor Kit for Arduino - 83cm Waterproof Probe with Anti-Polarization Design, 0-1000ppm ±10%, Water Quality Testing for Hydroponics/Aquarium/Home - Image 4](https://m.media-amazon.com/images/I/51Kd6qPJ-QL.jpg)
![Gravity: Analog TDS Meter Sensor Kit for Arduino - 83cm Waterproof Probe with Anti-Polarization Design, 0-1000ppm ±10%, Water Quality Testing for Hydroponics/Aquarium/Home - Image 5](https://m.media-amazon.com/images/I/61psUbMyabL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Know the mysteries of thine water!
*by A***G on 6 February 2021*

I wonder things, such as ash or bad rain, wouldst alter the water herein, that lieth await of measure. The "sensors", purchased from those of yonder great rainforest, have arrived. Doeth having so much waiste change our waters in ways we cannot imagine, yet may still divine? Valuing my fish and their health perhaps more than I do you and yours, reader, I shall not at mine own hand test these hypotheses. I shall defer to expert authority. Yet I would still measure, and have a little bird tell me in mine ear when such measures ring warning.

### ⭐⭐⭐⭐ Great budget sensor
*by P***A on 9 March 2021*

This is a pretty good budget EC sensor for small experiments. EC/TDS are highly dependent on water temperature so it would have been nice to have a DS18B20 included in the kit. There is a bit of extra calibration required so be prepared to do a little math when you hook this thing up. Luckily, the code samples were very useful and provided accurate readings when calibrated to the correct K value. This is perfect for my project right now, but I’m probably going to upgrade very, very soon... I’ll need a higher range beyond 1000ppm in the late summer.

### ⭐⭐⭐ Useful -- once you understand its limitations
*by C***E on 6 August 2021*

I purchased one of these to add to my hydroponics system -- it seemed like a neat measurement to track. HOWEVER, monitoring TDS for drinking water where TDS levels are (hopefully) in the 0 - 300 ppm range is entirely different than monitoring nutrient solution for hydroponics where TDS levels for most plants START at 1,000 ppm and range up to over 3,000 for some such as tomatoes! Unfortunately, these levels are way outside of the range for this probe. I have not yet found a packaged probe capable of measuring TDS beyond 1000 ppm and am beginning to think I'm going to be looking at the DIY projects again (which didn't seem too bad, but involved a lot of calculations). In terms of accuracy, this probe seems reasonable UNDER 500 ppm and I was able to get reasonably consistent readings compared with a typical "pen" probe for solutions with different TDS concentrations. Some advice out there suggests calibrating it using something like 700 ppm solution, but my experience has been that results are much better calibrating it with 200 - 300 ppm solution and taking any measurements over 500 "with a grain of salt" (there's a chemistry joke "dissolved" in there somewhere). The GravityTDS library isn't too bad to use, but there was a variable type issue that needed tweaking (int to uint16_t). Others have reported different niggling compile issues, but this is what I had to fix. I looked through the source code to better understand what it was doing and was more comfortable using it. (The sample code that doesn't use the library is pretty chonky -- more complex than needed IMHO.) NOTE! The library code uses a few bytes of EEPROM memory to stash a calibration constant. You can set the address so it doesn't stomp on other stuff, but I didn't like that it was quietly in there waiting to trash my other EEPROM data without warning -- I found it by accident. Anyway, the probe is fine for what it is intended for -- monitoring DRINKING WATER purity. Cheers!

## Frequently Bought Together

- Gravity: Analog TDS Sensor for Arduino | Total Dissolved Solids Meter | Water Quality Sensor Compatible with Arduino
- Gravity: Dual-Mode Turbidity Sensor for Arduino / ESP32 / STM32 / Raspberry Pi (ADC Required) | Water Quality Monitor | <500ms Response Time & 0-4000NTU Range
- PH Sensor for Arduino, PH0-14 Value Detect Sensor Module + PH Electrode Probe BNC, PH Sensor UNO, PH Sensor Arduino Kit, PH Sensor Raspberry Pi Kit, by HQ&LP

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-06-22*