--- 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: "₩31468" currency: KRW in_stock: true reviews_count: 4 category: "Dfrobot" url: https://www.desertcart.kr/products/230075013-gravity-analog-tds-meter-sensor-kit-for-arduino-83cm-waterproof store_origin: KR region: South Korea --- # 83cm waterproof probe for deep immersion 0-1000ppm ±10% TDS accuracy Anti-polarization AC signal for probe longevity 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:** ₩31468 **Availability:** ✅ In Stock ## Summary > 💧 Dive into precision water sensing with Gravity—because your water deserves the best! ## 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?** ₩31468 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/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, just instant data. - • **Precision You Can Trust:** Accurately measures dissolved solids with ±10% precision, ensuring your water quality data is always reliable. - • **Universal Compatibility:** Works seamlessly with 3.3V to 5.5V systems, making it perfect for a wide range of DIY and professional projects. - • **Built to Last Underwater:** Anti-polarization design and waterproof probe guarantee stable readings and extended sensor lifespan even in continuous immersion. - • **Versatile Water Quality Monitoring:** Ideal for hydroponics, aquariums, and home water testing—stay ahead in maintaining pristine water conditions. ## Overview The Gravity Analog TDS Meter Sensor Kit by DFROBOT features an 83cm waterproof probe with an anti-polarization AC signal design, delivering accurate total dissolved solids measurements from 0 to 1000ppm with ±10% accuracy. Designed for easy Arduino integration via a Gravity 3-pin interface, it supports wide voltage inputs (3.3-5.5V) and is perfect for hydroponics, aquariums, and home water quality monitoring. Note: probe and cable are waterproof, but the connection interface and signal board must stay dry. ## 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: Thanks - Great for measuring. Easy set up. 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 | #63,831 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #11 in Conductivity Meters & Accessories #57 in Lab pH Meters | | Brand | DFROBOT | | Brand Name | DFROBOT | | Customer Reviews | 4.2 out of 5 stars 28 Reviews | | Manufacturer | DFROBOT | | Maximum Supply Voltage | 5.5 volts_of_direct_current | | Measurement Accuracy | ±10% | | Model | SEN0244 | | Output Type | Analog | | Part Number | SEN0244 | | Specific Uses For Product | drinking water, hydroponics, aquariums, domestic water | | Style | Modern | | Style Name | Modern | | Unit Count | 1 Count | ## Product Details - **Brand:** DFROBOT - **Maximum Supply Voltage:** 5.5 volts_of_direct_current - **Measurement Accuracy:** ±10% - **Output Type:** Analog - **Style:** Modern ## 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 ### ⭐⭐⭐⭐⭐ Thanks *by Z***T on July 29, 2026* Great for measuring. Easy set up. ### ⭐⭐⭐⭐⭐ 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. ### ⭐⭐⭐⭐ 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. ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.kr/products/230075013-gravity-analog-tds-meter-sensor-kit-for-arduino-83cm-waterproof](https://www.desertcart.kr/products/230075013-gravity-analog-tds-meter-sensor-kit-for-arduino-83cm-waterproof) --- *Product available on Desertcart South Korea* *Store origin: KR* *Last updated: 2026-09-04*