--- product_id: 247081258 title: "Gravity: Analog TDS Sensor for Arduino | Total Dissolved Solids Meter | Water Quality Sensor Compatible with Arduino" brand: "dfrobot" price: "HK$244" currency: HKD in_stock: true url: https://www.desertcart.hk/products/247081258-gravity-analog-tds-sensor-for-arduino-total-dissolved-solids-meter store_origin: HK region: Hong Kong --- # Waterproof Probe: Yes TDS Range: 0~2000 ppm Output: 0~2.3V analog Gravity: Analog TDS Sensor for Arduino | Total Dissolved Solids Meter | Water Quality Sensor Compatible with Arduino **Brand:** dfrobot **Price:** HK$244 **Availability:** βœ… In Stock ## Summary > πŸ’‘ Dive into Precision: Measure Water Quality Like a Pro! ## Quick Answers - **What is this?** Gravity: Analog TDS Sensor for Arduino | Total Dissolved Solids Meter | Water Quality Sensor Compatible with Arduino by dfrobot - **How much does it cost?** HK$244 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/247081258-gravity-analog-tds-sensor-for-arduino-total-dissolved-solids-meter) ## 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 - β€’ **Plug-and-Play Design:** No soldering requiredβ€”just connect and start measuring! - β€’ **Compact & Lightweight:** Weighing only 30g, it’s perfect for portable projects. - β€’ **Comprehensive Support:** Access detailed tutorials and customer service for a smooth experience. - β€’ **Advanced AC Excitation:** Prevents probe polarization for accurate and reliable readings. - β€’ **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: Β± 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 ## Features - This is an TDS (Total Dissolved Solids) Meter with gravity interface compatible with Arduino - Good Compatibility Output: 0~2.3V analog signal output, compatible with 5V or 3.3V controller - AC Excitation Source: effectively prevent probe from polarization. Probe is waterproof - Easy to Use: simple connection, plug and play without soldering - More tutorial (English Version) please search "product guides and documents" on this page to download. If you couldn't find it please contact with DFRobot Customer Service on desertcart. ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | DFROBOT | | Part number | SEN0244 | | Item Weight | 30 g | | Package Dimensions | 12.1 x 8.1 x 3 cm; 30 g | | Item model number | SEN0244 | | Item Package Quantity | 1 | | Batteries included? | No | | Batteries Required? | No | ## Images ![Gravity: Analog TDS Sensor for Arduino | Total Dissolved Solids Meter | Water Quality Sensor Compatible with Arduino - Image 1](https://m.media-amazon.com/images/I/6192ip0BC4L.jpg) ## 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? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hk/products/247081258-gravity-analog-tds-sensor-for-arduino-total-dissolved-solids-meter](https://www.desertcart.hk/products/247081258-gravity-analog-tds-sensor-for-arduino-total-dissolved-solids-meter) --- *Product available on Desertcart Hong Kong* *Store origin: HK* *Last updated: 2026-05-19*