---
product_id: 230075013
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: "€ 28.10"
currency: EUR
in_stock: true
reviews_count: 3
category: "Dfrobot"
url: https://www.desertcart.com.cy/products/230075013-gravity-analog-tds-meter-sensor-kit-for-arduino-83cm-waterproof
store_origin: CY
region: Cyprus
---

# 83cm waterproof probe for long immersion 0-1000ppm ±10% TDS accuracy Anti-polarization AC signal extends probe life 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:** € 28.10
**Availability:** ✅ In Stock

## Summary

> 💧 Dive Deep Into Data: Master Your 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?** € 28.10 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/230075013-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 & Play Simplicity:** Gravity 3-pin interface enables effortless Arduino integration—no soldering, no hassle.
- • **Wide Voltage Compatibility:** Works seamlessly with 3.3V to 5.5V systems, perfect for diverse DIY and professional projects.
- • **Waterproof Probe, Not Board:** Submersible 83cm probe lets you test confidently—just keep the board dry to maintain performance.
- • **Durable Anti-Polarization Design:** AC excitation prevents probe degradation, ensuring stable readings and longer sensor lifespan.
- • **Precision Water Quality Insights:** Monitor dissolved solids with lab-grade ±10% accuracy for healthier plants and aquatic life.

## Overview

The Gravity Analog TDS Meter Sensor Kit offers precise dissolved solids measurement (0-1000ppm ±10%) with an 83cm waterproof probe and anti-polarization AC signal technology. Designed for Arduino users, it features easy plug-and-play connectivity and broad voltage compatibility, making it ideal for hydroponics, aquariums, and home water quality monitoring. Its durable probe ensures long-term immersion, while the sensor board requires dry conditions.

## Description

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: desertcart.com: Industrial & Scientific

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.
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.

## 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
- Anti-Polarization & Long-Last Probe: The measurement excitation source adopts an AC signal, effectively preventing probe polarization. This extends the probe's lifespan while enhancing output signal stability. The TDS probe features a waterproof design, allowing for long-term immersion in water during measurements
- 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 | #139,181 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #32 in Conductivity Meters & Accessories #138 in Lab pH Meters |
| Date First Available | March 27, 2020 |
| Item Weight | 1.06 ounces |
| Item model number | SEN0244 |
| Manufacturer | DFROBOT |
| Package Dimensions | 4.76 x 3.19 x 1.18 inches |

## 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)

## Customer Reviews

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

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

### ⭐⭐⭐ Useful -- once you understand its limitations
*by C***E on August 6, 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 Cyprus*
*Store origin: CY*
*Last updated: 2026-03-24*