---
product_id: 246188282
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: "₨492"
currency: SCR
in_stock: true
reviews_count: 8
category: "Cq Robot"
url: https://www.desertcart.sc/products/246188282-cqrobot-tds-total-dissolved-solids-meter-sensor-compatible-with-raspberry
store_origin: SC
region: Seychelles
---

# 3.3V-5.5V wide voltage input Waterproof probe with 83cm cable 0-2.3V analog output, 1000ppm range 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:** ₨492
**Availability:** ✅ In Stock

## Summary

> 💧 Decode your water’s story with precision and ease!

## 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?** ₨492 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/246188282-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

- • **Versatile Voltage Range:** Operates smoothly between 3.3V and 5.5V, fitting diverse microcontroller setups.
- • **Waterproof & Long Reach:** Durable probe with 83cm cable keeps electronics safe and dry during testing.
- • **Plug & Play STEM Powerhouse:** Seamless Arduino & Raspberry Pi compatibility for instant liquid quality insights.
- • **Educational & Research Ready:** Ideal for labs, classrooms, and DIY projects to decode water purity like a pro.
- • **Precision Meets Practicality:** Accurate TDS readings with ±10% full scale measurement for reliable scientific analysis.

## Overview

The CQRobot TDS Meter Sensor is a robust, waterproof liquid quality analyzer compatible with Arduino and Raspberry Pi. Featuring a wide voltage input (3.3V-5.5V), analog output (0-2.3V) for up to 1000ppm TDS measurement, and a long 83cm probe cable, it delivers reliable, ±10% accurate readings ideal for educational, scientific, and DIY applications.

## Description

Buy CQRobot TDS (Total Dissolved Solids) Meter Sensor Compatible with Raspberry Pi/Arduino Board. for Liquid Quality Analysis Teaching, Scientific Research, Laboratory, Online Analysis, etc. at desertcart UK. Free delivery on eligible orders.

Review: easy to use - this tds sensor module includes a control board, a probe with rather long cable (54cm) and wires set for connecting it to arduino/raspberry pi (need 3 extra male to male wire jumpers if connect to arduino) it is very easy to use, it simple return a ppm value from the signal terminal to analog pin, probably less than 5 minutes to finish a liquid test app if you’re familiar with these platforms i used the module with arduino, tested quality of tap water, boiled water, water from coffee dip tray and rain water the result was quite unexpected: tap water and boiled water were 48ppm, both were in ideal drinking water level, muddy water from coffee dip tray was just 68ppm, i thought it would be much higher the most surprising result was that, the water i collected from rain had only 12ppm, very pure, not much dissolved solid inside in conclusion, this sensor is great for educational purpose, to let student understand more about tds, but definitely it’s not fit for determining drinking water quality, as tds does not measure harmful contaminants in water all in all, this product fit for its purpose, i’m very happy with it, would recommend it
Review: Well supported sensor - The thing that I like most about the CQRobot sensors is their support wiki that includes both the circuit diagrams and the code for using their sensors with both Arduino and Raspberry Pi. If you are going to use this sensor with the Raspberry Pi then you will need another module to convert to output signal so that the Raspberry Pi can process it. The code for the Arduino works straight out of the box. This sensor can be used to measure the hardness of water or the amount of dissolved solids of anything else you might be using in the lab. The probe is well made and easy to clean between uses. I am very impressed.

## 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 | 77,027 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 37 in Electrodes |
| Brand | CQRobot |
| Country Of Origin | China |
| Current Rating | 3 Milliamps |
| Current rating | 3 Milliamps |
| Customer Reviews | 4.3 out of 5 stars 228 Reviews |
| Item Weight | 0.05 Kilograms |
| Item weight | 0.05 Kilograms |
| Manufacturer | CQRobot |
| Manufacturer Part Number | CQRSENTDS01 |
| Material | PLA_(Polylactic Acid), PE_(Polyethylene) |
| Maximum Supply Voltage | 5.5 Volts |
| Maximum supply voltage | 5.5 Volts |
| Measurement Accuracy | [+/- 10% F.S.] |
| Model Number | CQRSENTDS01 |
| Output Type | physical |
| Sensing Distance | 83 Centimetres |
| Specific Uses For Product | liquid quality analysis, scientific research, laboratory use, online analysis, DIY projects, educational settings |
| Style | TDS Meter Sensor |
| Style Name | TDS Meter Sensor |

## Product Details

- **Brand:** CQRobot
- **Current rating:** 3 Milliamps
- **Item weight:** 0.05 Kilograms
- **Material:** PLA_(Polylactic Acid), PE_(Polyethylene)
- **Style:** TDS Meter Sensor

## 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/71b5ePBRYfL.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/71u0cKZutiL.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

### ⭐⭐⭐⭐⭐ easy to use
*by G***T on 20 December 2020*

this tds sensor module includes a control board, a probe with rather long cable (54cm) and wires set for connecting it to arduino/raspberry pi (need 3 extra male to male wire jumpers if connect to arduino) it is very easy to use, it simple return a ppm value from the signal terminal to analog pin, probably less than 5 minutes to finish a liquid test app if you’re familiar with these platforms i used the module with arduino, tested quality of tap water, boiled water, water from coffee dip tray and rain water the result was quite unexpected: tap water and boiled water were 48ppm, both were in ideal drinking water level, muddy water from coffee dip tray was just 68ppm, i thought it would be much higher the most surprising result was that, the water i collected from rain had only 12ppm, very pure, not much dissolved solid inside in conclusion, this sensor is great for educational purpose, to let student understand more about tds, but definitely it’s not fit for determining drinking water quality, as tds does not measure harmful contaminants in water all in all, this product fit for its purpose, i’m very happy with it, would recommend it

### ⭐⭐⭐⭐⭐ Well supported sensor
*by A***Y on 13 December 2020*

The thing that I like most about the CQRobot sensors is their support wiki that includes both the circuit diagrams and the code for using their sensors with both Arduino and Raspberry Pi. If you are going to use this sensor with the Raspberry Pi then you will need another module to convert to output signal so that the Raspberry Pi can process it. The code for the Arduino works straight out of the box. This sensor can be used to measure the hardness of water or the amount of dissolved solids of anything else you might be using in the lab. The probe is well made and easy to clean between uses. I am very impressed.

### ⭐⭐⭐⭐ Probably a good TDS secory but not suitable for EC measurement in my experience
*by J***. on 25 May 2023*

Came as a tidy package. Full disclosure it was my desire to use the probe as an EC sensor figuring that if it can measure TDS it can be adapted to measure EC. However for EC use the sensitivity was not good enough. The output voltage difference between 1413us/cm and 2760 us/cm calibration solutions (typical range for my Hydroponics use case) was only around 0.5V. I may have been able to get it to work with more tinkering but in the end gave up and purchased a much more expensive (alas) EC probe. FYI replacing an Atlas Scientific EC probe which failed after 4 years.

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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-05-22*