---
product_id: 246746858
title: "CQRobot 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: "₩35444"
currency: KRW
in_stock: true
reviews_count: 8
category: "Cq Robot"
url: https://www.desertcart.kr/products/246746858-cqrobot-tds-total-dissolved-solids-meter-sensor-compatible-with-raspberry
store_origin: KR
region: South Korea
---

# 3.3V-5.5V wide voltage input Waterproof probe for liquid immersion 0-2.3V analog output, Arduino & Raspberry Pi ready CQRobot 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:** ₩35444
**Availability:** ✅ In Stock

## Summary

> 💧 Measure smarter, not harder — your liquid quality’s new best friend!

## Quick Answers

- **What is this?** CQRobot 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?** ₩35444 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/246746858-cqrobot-tds-total-dissolved-solids-meter-sensor-compatible-with-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

- • **Plug & Play Precision:** Effortless Arduino compatibility with no soldering needed—get your project live in minutes.
- • **Waterproof Durability:** Robust probe design ensures reliable readings even in fully immersed liquid environments.
- • **Accurate Analog Output:** Delivers a clean 0-2.3V signal compatible with 16-bit ADC modules for high-resolution data.
- • **Ideal for Trendsetters:** Perfect for hydroponics, scientific research, and real-time liquid quality monitoring—stay ahead of the curve.
- • **Versatile Voltage Range:** Operates seamlessly between 3.3V and 5.5V, perfect for diverse microcontroller setups.

## Overview

The CQRobot TDS Meter Sensor is a modern, waterproof dissolved solids sensor compatible with Raspberry Pi and Arduino boards. It features a wide voltage input (3.3V-5.5V), outputs a precise 0-2.3V analog signal, and is designed for easy plug-and-play use without soldering. Ideal for scientific research, teaching, hydroponics, and online liquid quality analysis, it offers reliable, high-resolution data with a durable probe built to prevent polarization.

## Description

CQRobot TDS (Total Dissolved Solids) Meter Sensor Compatible with Raspberry Pi/Arduino Board. for Liquid Quality Analysis Teaching, Scientific Research, Laboratory, Online Analysis, etc.: desertcart.com: Industrial & Scientific

Review: Best TDS sensor available! - Product arrived quickly and was exactly what was needed. This is a great sensor that can be used for many different projects. Easy to set up. Will work well for my hydroponics project.
Review: Accurate and useful. - It does take a little bit of programing knowledge as the documentation is poor and muddied by a couple different libraries for essentially the same product. With a little bit of perseverance and general arduino knowledge you can get it working. I've had it running for a week now just to make sure it stayed calibrated reasonably well and it's been great. I currently have mine running on an ESP32 DevkitC with wifi connectivity hosting a local web interface and tracking the readings for a week at a time. You can see over the data each time i've bumped the nutrients so it's following my trend line well. Be aware, you'll need a TDS meter that you trust in order to calibrate it but once you get it dialed in it's great. Also here's my basic breadboard test of it to show how simple the circuit is.

## 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.
- Note: When using the TDS instrument sensor, the sensor probe is immersed in liquid, and the purchaser needs to Separate the sensor Probe Protective Cover to avoid incorrect data reading and malfunction.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08KXRHK7H |
| Best Sellers Rank | #128,334 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #27 in Conductivity Meters & Accessories |
| Brand | CQRobot |
| Brand Name | CQRobot |
| Current Rating | 4 Milliamps |
| Customer Reviews | 4.2 out of 5 stars 229 Reviews |
| Item Weight | 0.05 Kilograms |
| Manufacturer | CQRobot |
| Material | PLA_(Polylactic Acid), PE_(Polyethylene) |
| Material Type | PLA_(Polylactic Acid), PE_(Polyethylene) |
| Maximum Supply Voltage | 5.5 Volts |
| Measurement Accuracy | +/- 10% F.S. (25 Degree Celsius) |
| Model | CQRSENTDS01 |
| Output Type | Analog Voltage |
| Specific Uses For Product | laboratory, scientific research, teaching, liquid quality analysis, online analysis |
| Style | Modern |
| Style Name | Modern |

## Product Details

- **Brand:** CQRobot
- **Current Rating:** 4 Milliamps
- **Item Weight:** 0.05 Kilograms
- **Material:** PLA_(Polylactic Acid), PE_(Polyethylene)
- **Style:** Modern

## Images

![CQRobot 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 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/71FdAzdjf1L.jpg)
![CQRobot 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/71shj9fyHJL.jpg)
![CQRobot 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 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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best TDS sensor available!
*by P***H on October 28, 2025*

Product arrived quickly and was exactly what was needed. This is a great sensor that can be used for many different projects. Easy to set up. Will work well for my hydroponics project.

### ⭐⭐⭐⭐⭐ Accurate and useful.
*by S***N on September 18, 2025*

It does take a little bit of programing knowledge as the documentation is poor and muddied by a couple different libraries for essentially the same product. With a little bit of perseverance and general arduino knowledge you can get it working. I've had it running for a week now just to make sure it stayed calibrated reasonably well and it's been great. I currently have mine running on an ESP32 DevkitC with wifi connectivity hosting a local web interface and tracking the readings for a week at a time. You can see over the data each time i've bumped the nutrients so it's following my trend line well. Be aware, you'll need a TDS meter that you trust in order to calibrate it but once you get it dialed in it's great. Also here's my basic breadboard test of it to show how simple the circuit is.

### ⭐⭐⭐⭐ Good probe, but some IMPORTANT TIPS....
*by J***A on May 27, 2022*

Works well. Some tips... - Download and Use the GravityTDS.h library instead of using the sample code. MUCH simpler and easier to implement. - Remember to pull off the cover from the tip of the probe! I didn't even notice the probe cover for the first 20 mins of trying to get it to work. - For most accurate results, buy a separate temperature probe and code your project to have the temperature sensor provide the temperature compensation value for the TDS sensor.

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-03-12*