--- product_id: 312092270 title: "KEYESTUDIO TDS Meter Probe Water Quality Monitor Sensor Module" price: "ΰΈΏ1323" currency: THB in_stock: true reviews_count: 8 url: https://www.desertcart.co.th/products/312092270-keyestudio-tds-meter-probe-water-quality-monitor-sensor-module store_origin: TH region: Thailand --- # 3.3~5.5V wide voltage range 0~1000 ppm TDS measurement range XH2.54-3Pin plug & play connector KEYESTUDIO TDS Meter Probe Water Quality Monitor Sensor Module **Price:** ΰΈΏ1323 **Availability:** βœ… In Stock ## Summary > πŸ’§ Elevate your water IQ β€” because clean water is the new luxury. ## Quick Answers - **What is this?** KEYESTUDIO TDS Meter Probe Water Quality Monitor Sensor Module - **How much does it cost?** ΰΈΏ1323 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/312092270-keyestudio-tds-meter-probe-water-quality-monitor-sensor-module) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Real-Time Analog Output:** Provides a 0~2.3V analog signal for instant water quality monitoring and easy data logging. - β€’ **Durable Waterproof Probe:** 60cm electrode probe built to withstand domestic and hydroponic environments for long-term use. - β€’ **Seamless Arduino Integration:** Plug-and-play design with XH2.54 connectors ensures effortless setup and compatibility with your DIY projects. - β€’ **Versatile Voltage Compatibility:** Operates smoothly within a broad 3.3 to 5.5V range, perfect for various microcontrollers and embedded systems. - β€’ **Precision Water Quality Insights:** Accurately measures Total Dissolved Solids up to 1000 ppm with Β±10% accuracy for reliable water cleanliness data. ## Overview The KEYESTUDIO TDS Meter Probe is a plug-and-play sensor module designed for Arduino users to measure Total Dissolved Solids (TDS) in water, indicating water purity. It supports a wide input voltage (3.3~5.5V), outputs an analog signal (0~2.3V), and features a waterproof 60cm probe with XH2.54 connectors. Ideal for domestic water and hydroponics, it empowers professionals and hobbyists to monitor water quality with precision and ease. ## Description Keyestudio TDS sensor kit is compatible with Arduino controllers, plug and play, easy to use, Analog TDS Sensor for Domestic Water and Hydroponics Water Quality Monitoring Technical Parameters TDS Meter sensor: Input Voltage: DC 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: XH2.54-3P Electrode Interface: XH2.54-2P Waterproof TDS Probe: Number of Needle: 2 Total Length: 60cm Connection Interface: XH2.54-2P Color: White Shipping List: TDS Meter V1.0 sensor for Arduino x1 Waterproof TDS Probe x1 XH2.54-3Pin Jumper Wire x1 Review: Exactly what I needed - I bought this and the turbidity sensor to add to my K40 laser cutter setup. This thing turned out perfect. My issue is that it is cooled by water in a bucket in a place I can't see, so it makes it hard to tell if there's algae etc in the water. This sensor gives me instant readings. I just used the example code from the wiki and I was off to the races. Review: Works but requires a lot of tweaking - I bought two of these to measure the TDS of the water going into my reverse osmosis system and the levels coming out. This way I know when to change the filters without just blindly doing so every x number of months. The data is logged into Home Assistant and I get a push notification when I need to replace them now. I originally connected these sensors to the analog-to-digital (ADC) on an ESP32 microcontroller, testing it in both the Arduino IDE and ESPHome. The voltage was all over the place and produced garage readings. I ended up using instead an ADS1115 (16-Bit, 4 channel ADC) and connected it to the ESP32 via the I2C interface. This eliminated most of the problems of repeatability and I was finally getting consistent readings. HOWEVER, there was still a lot of variation in readings from one probe to the next. I had to individually calibrate each sensor to correct this. There's sample Arduino for this product online which contains a calibration formula--ignore it, it's completely useless. Instead, I made eight different concentrations of a calibration solution by mixing lab-grade deionized water and table salt. I then plotted the observed voltage at each concentration and came up a linear calibration curve using the least squares means method. (This sounds complex but is rather easy to setup using the "calibrate_linear" filter in ESPHome). I did this for each of the two senors, making a unique calibration profile for each. Everything now works and is reasonably accurate for my needs. I am somewhat concerned about long-term drift but will update this review with my experiences over time. ## Features - This TDS probe sensor for arduino is used to measure TDS value of the water. The TDS value can be used as one of the basis for reflecting the cleanliness of water. - TDS (Total Dissolved Solids): indicates how many milligrams of soluble solids dissolved in one liter of water. The higher the TDS value, the more soluble solids dissolved in water, and the less clean the water is. - This TDS Meter Probe is plug and play and easy to use. Also, the wide supply voltage of 3.3~5.5V and the analog signal output of 0~2.3V. Comes with XH2.54-2P/3P connector wires. - Its Electrode can measure conductive materials, such as suspended solids, heavy metals and conductive ions in water. Also, it can be used for water quality testing in the field of domestic water and hydroponics. - With this sensor, you can easily DIY a TDS detector, and easily check the cleanliness of the water to make your water quality better. How to use: Search for "keyestudio wiki KS0429" in Google Chrome to get the wiki online tutorial for this product. ## Technical Specifications | Specification | Value | |---------------|-------| | Best Sellers Rank | #1,259 in Single Board Computers (Computers & Accessories) | | Customer Reviews | 4.2 out of 5 stars 126 Reviews | ## Images ![KEYESTUDIO TDS Meter Probe Water Quality Monitor Sensor Module - Image 1](https://m.media-amazon.com/images/I/51eEh2sLjkL.jpg) ## Questions & Answers **Q: Will this work on salt (ocean) water (not continuously submerged)?** A: Depends on the tds level of the water. This meter only goes up to 1000 ppm. If the water is higher than that it won’t read it correctly **Q: Can this be left submerged permanently?** A: If you talk about the sensor itself, I would say yes. Depends a bit on the salinity of the fluid you are measuring. Sea water will destroy everything given enough time. Potable water should be OK. **Q: Can i use this sensor an esp32 board? the example code is for arduino uno** A: Yes it works just fine with an ESP 32. the example code works as well for the esp 32 **Q: Does this come with any calibration solutions or what is recommended for calibration?** A: it does not. Also, it only reads up to 1000ppm, so its ok for water quality testing, but not hydroponics nutrient solution. you can buy calibration solution on amazon ## Customer Reviews ### ⭐⭐⭐⭐⭐ Exactly what I needed *by D***R on August 7, 2020* I bought this and the turbidity sensor to add to my K40 laser cutter setup. This thing turned out perfect. My issue is that it is cooled by water in a bucket in a place I can't see, so it makes it hard to tell if there's algae etc in the water. This sensor gives me instant readings. I just used the example code from the wiki and I was off to the races. ### ⭐⭐⭐⭐ Works but requires a lot of tweaking *by J***E on August 7, 2020* I bought two of these to measure the TDS of the water going into my reverse osmosis system and the levels coming out. This way I know when to change the filters without just blindly doing so every x number of months. The data is logged into Home Assistant and I get a push notification when I need to replace them now. I originally connected these sensors to the analog-to-digital (ADC) on an ESP32 microcontroller, testing it in both the Arduino IDE and ESPHome. The voltage was all over the place and produced garage readings. I ended up using instead an ADS1115 (16-Bit, 4 channel ADC) and connected it to the ESP32 via the I2C interface. This eliminated most of the problems of repeatability and I was finally getting consistent readings. HOWEVER, there was still a lot of variation in readings from one probe to the next. I had to individually calibrate each sensor to correct this. There's sample Arduino for this product online which contains a calibration formula--ignore it, it's completely useless. Instead, I made eight different concentrations of a calibration solution by mixing lab-grade deionized water and table salt. I then plotted the observed voltage at each concentration and came up a linear calibration curve using the least squares means method. (This sounds complex but is rather easy to setup using the "calibrate_linear" filter in ESPHome). I did this for each of the two senors, making a unique calibration profile for each. Everything now works and is reasonably accurate for my needs. I am somewhat concerned about long-term drift but will update this review with my experiences over time. ### ⭐⭐⭐⭐⭐ Good *by P***S on March 29, 2021* good ## Frequently Bought Together - KEYESTUDIO TDS Meter Probe Water Quality Monitoring V1 Sensor Module with XH2.54-3Pin Jumper Wire Connector for Arduino - KEYESTUDIO Turbidity Sensor Module V1 for Arduino,Water Quality Monitor Particles Water/Liquid Turbidity Level Tester - CQRobot TDS (Total Dissolved Solids) Meter Sensor Compatible with Raspberry Pi/Arduino Board. for Liquid Quality Analysis Teaching, Scientific Research, Laboratory, Online Analysis, etc. --- ## 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.co.th/products/312092270-keyestudio-tds-meter-probe-water-quality-monitor-sensor-module](https://www.desertcart.co.th/products/312092270-keyestudio-tds-meter-probe-water-quality-monitor-sensor-module) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-27*