--- product_id: 313857551 title: "CQRobot Ocean: TDS (Total Dissolved Solids) Meter Sensor Compatible with Raspberry Pi/Arduino Board. for Liquid Quality Analysis Teaching, Scientific Research, Laboratory, Online Analysis, etc." brand: "cqrobot" price: "£21.16" currency: GBP in_stock: true category: "Cq Robot" url: https://www.desertcart.co.uk/products/313857551-cqrobot-ocean-tds-total-dissolved-solids-meter-sensor-compatible-raspberry store_origin: GB region: United Kingdom --- # 3.3V-5.5V wide voltage input Waterproof probe for durability 0-1000 ppm TDS measurement range CQRobot Ocean: TDS (Total Dissolved Solids) Meter Sensor Compatible with Raspberry Pi/Arduino Board. for Liquid Quality Analysis Teaching, Scientific Research, Laboratory, Online Analysis, etc. **Brand:** cqrobot **Price:** £21.16 **Availability:** ✅ In Stock ## Summary > 💧 Measure purity like a pro—never miss a drop of data! ## Quick Answers - **What is this?** CQRobot Ocean: TDS (Total Dissolved Solids) Meter Sensor Compatible with Raspberry Pi/Arduino Board. for Liquid Quality Analysis Teaching, Scientific Research, Laboratory, Online Analysis, etc. by cqrobot - **How much does it cost?** £21.16 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/313857551-cqrobot-ocean-tds-total-dissolved-solids-meter-sensor-compatible-raspberry) ## Best For - cqrobot enthusiasts ## Why This Product - Trusted cqrobot brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Efficient:** Low power consumption (3-6mA) with a sleek 43x32mm module size. - • **Plug & Play Simplicity:** Effortless Arduino & Raspberry Pi integration—no soldering needed. - • **Precision You Can Trust:** 16-bit ADC compatibility ensures accurate TDS readings within ±10%. - • **Versatile Voltage Range:** Operates seamlessly from 3.3V to 5.5V for broad controller compatibility. - • **Durable Waterproof Probe:** Engineered for reliable liquid quality analysis in any environment. ## Overview The CQRobot Ocean TDS Meter Sensor is a professional-grade, Arduino and Raspberry Pi compatible device designed for precise liquid quality analysis. Featuring a wide voltage input (3.3V-5.5V), waterproof probe, and analog output compatible with 16-bit ADC modules, it measures total dissolved solids in water from 0 to 1000 ppm with ±10% accuracy. Ideal for scientific research, teaching, and online monitoring, this compact sensor delivers reliable, plug-and-play performance with minimal power consumption. ## Description 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. CQRobot has launched an arduino-compatible TDS sensor, which can be used to measure the TDS value of water after connecting to the arduino controller, plug and play. 3.3V to 5.5V wide voltage power supply, 0 to 2.3V analog signal output, making this product compatible with 5V and 3.3V control systems. With CQRobot ADS1115 16-Bit ADC Module (ASIN: B08KFZ3PVT and Model: CQRADS1115), it can accurately collect and convert analog signals to meet the compatibility requirements of the Raspberry Pi board. Wiki: www.cqrobot.wiki/index.php/TDS_Meter_SensorAttention: This kit does not include CQRobot ADS1115 16-bit AD conversion module.SPECIFICATIONSignal Transmitter Board Specifications - Input Voltage: 3.3V to 5.5V - Output Voltage: 0 to 2.3V - Working Current: 3mA to 6mA - TDS Measurement Range: 0 to 1000ppm - TDS Measurement Accuracy: Plus/Minus 10% F.S. (25 Degree Celsius) - Module Size: 43mm * 32.2mm - Module Interface: JST 2.0mm 3-Pin - Electrode Interface: JST 2.54mm 2-Pin TDS Probe Specifications - Number of Needle: 2 - Total Length: 83cm - Connection Interface: JTS 2.54mm 2-Pin - Color: Black - Other: Waterproof Probe Ocean Interface Cable Specifications - Cable specifications: 22AWG - Material: Silicone - Withstand Voltage: Less Than 50V - Withstand Current: Less Than 1000MA - Length: 21cm - Line Sequence: Black-Negative Power Supply, Red-Positive Power Supply, Green-Signal Terminal.SHIPPING LIST1 * Signal Transmitter Board 1 * TDS Probe 1 * Ocean Interface JST 3-Pin Cable ## Features - Wide Voltage Input: 3.3V to 5.5V. Good Compatibility Output: 0 to 2.3V analog signal output, compatible with 5V or 3.3V controller. - AC Excitation Source: effectively prevent probe from polarization, Waterproof Probe. - Easy to Use: Arduino compatible, simple connection, plug and play without soldering. - Used with ADS1115 16-Bit ADC Module (ASIN: B08KFZ3PVT, Model: CQRADS1115), Compatible with Raspberry Pi Motherboard. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08KXRHK7H | | Best Sellers Rank | #59,586 in Computers ( See Top 100 in Computers ) #856 in Single-Board Computers | | Brand Name | CQRobot | | Current Rating | 4 Milliamps | | Customer Reviews | 4.4 4.4 out of 5 stars (229) | | Item Weight | 0.05 Kilograms | | Manufacturer | CQRobot | | Material Type | Silicone | | Maximum Supply Voltage | 5.5 Volts | | Measurement Accuracy | Plus/Minus 10% F.S. (25 Degree Celsius) | | Model | CQRSENTDS01 | | Mounting Type | Flange Mount | | Output Type | Analog Voltage | | Part Number | CQRSENTDS01 | | Sensing Distance | 83 Centimeters | | Specific Uses For Product | liquid quality analysis, teaching, scientific research, laboratory, online analysis | | Style Name | Modern | ## Product Details - **Brand:** CQRobot - **Current rating:** 4 Milliamps - **Item weight:** 0.05 Kilograms - **Material:** Silicone - **Style:** Modern ## Images ![CQRobot Ocean: TDS (Total Dissolved Solids) Meter Sensor Compatible with Raspberry Pi/Arduino Board. for Liquid Quality Analysis Teaching, Scientific Research, Laboratory, Online Analysis, etc. - Image 1](https://m.media-amazon.com/images/I/61E4z2jd5zL.jpg) ![CQRobot Ocean: TDS (Total Dissolved Solids) Meter Sensor Compatible with Raspberry Pi/Arduino Board. for Liquid Quality Analysis Teaching, Scientific Research, Laboratory, Online Analysis, etc. - Image 2](https://m.media-amazon.com/images/I/71b5ePBRYfL.jpg) ![CQRobot Ocean: TDS (Total Dissolved Solids) Meter Sensor Compatible with Raspberry Pi/Arduino Board. for Liquid Quality Analysis Teaching, Scientific Research, Laboratory, Online Analysis, etc. - Image 3](https://m.media-amazon.com/images/I/71u0cKZutiL.jpg) ![CQRobot Ocean: TDS (Total Dissolved Solids) Meter Sensor Compatible with Raspberry Pi/Arduino Board. for Liquid Quality Analysis Teaching, Scientific Research, Laboratory, Online Analysis, etc. - Image 4](https://m.media-amazon.com/images/I/71IpiRSKLyL.jpg) ![CQRobot Ocean: TDS (Total Dissolved Solids) Meter Sensor Compatible with Raspberry Pi/Arduino Board. for Liquid Quality Analysis Teaching, Scientific Research, Laboratory, Online Analysis, etc. - Image 5](https://m.media-amazon.com/images/I/71bR35bLnIL.jpg) ## Questions & Answers **Q: Can this sensor work with an ESP32 and esphome?** A: Hello! It can be used with ESP32 and esphome, it's just that we don't have example test code at the moment. Buyers need to have a certain ESP32 application coding foundation, test and write code by themselves. **Q: Can the probe be fully submersed? And if so, for how long? Indefinitely?** A: Hi! The TDS probe and lead are made of waterproof material and can be immersed in water, but the cable interface and signal transfer board are not waterproof, please use it with caution. Please refer to the "Connections and Examples" section in the Wiki of this product below: http://www.cqrobot.wiki/index.php/TDS_(Total_Dissolved_Solids)_Meter_Sensor_SKU:_CQRSENTDS01 **Q: Is the sensor able to be plumbed into water line? a number of tds sensors will directly fit in a 1/4" push connect fitting.** A: Hi! The probe and lead of the TDS sensor are made of waterproof material, which can be inserted into the water pipe and installed in the 1/4" push connection fitting, but make sure that the water temperature in the water pipe does not exceed 55 degrees Celsius, because the probe cannot be used in water above 55 degrees Celsius. Please. Refer to the "Connections and Examples" section in the following Wiki of this product: http://www.cqrobot.wiki/index.php/TDS_(Total_Dissolved_Solids)_Meter_Sensor_SKU:_CQRSENTDS01 ## Frequently Bought Together - CQRobot TDS (Total Dissolved Solids) Meter Sensor Compatible with Raspberry Pi/Arduino Board. for Liquid Quality Analysis Teaching, Scientific Research, Laboratory, Online Analysis, etc. - 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 - KEYESTUDIO Turbidity Sensor Module V1 for Arduino,Water Quality Monitor Particles Water/Liquid Turbidity Level Tester --- ## 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.co.uk/products/313857551-cqrobot-ocean-tds-total-dissolved-solids-meter-sensor-compatible-raspberry](https://www.desertcart.co.uk/products/313857551-cqrobot-ocean-tds-total-dissolved-solids-meter-sensor-compatible-raspberry) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-01*