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

The media could not be loaded. 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 platformsi used the module with arduino, tested quality of tap water, boiled water, water from coffee dip tray and rain waterthe 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 higherthe most surprising result was that, the water i collected from rain had only 12ppm, very pure, not much dissolved solid insidein 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 waterall in all, this product fit for its purpose, i’m very happy with it, would recommend it

As a serious sensor this is very well made and thought through. It took me a while to get my head around how this works and thought this is an absolute must in a STEM teaching environment. The sensor head is fully water proof so is the cable up to the end of the black outer covering near the connector (which isnt past that end). The sensor cable is 83cm so you can safely keep the electronics well away from the water!!! The electronics to arduino / raspberry Pi cable is 21cm. This is a 3.3V to 5.5V 3mA to 6mA typical sensor module with an analogue output signal of 0V to 2.3V full scale which is 1000ppm. The electronics ensure a linear output across the full scale and measurements down near 0ppm are accurate and possible - just make sure the test sample is at room temperature (25°C) and the sensor head in the middle of the beaker suspended (if you place near edge you will get errors in reading). The sensor must not be used on liquids hotter than 55°C and importantly if using with the Raspberry Pi you will need another CQrobots module CQRADS1115 which is a 16bit ADC. I found this is a great module and the low output signal voltage means you can use this with PICs and FPGAs with inbuilt ADCs without issue or the extra board. Having lots of fun with it! Hapoy to highly recommend, Andrew

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.

I've now used a whole host of CQRobot sensors and I've been highly impressed by the ease and functionality of all their products. This carries over with this TDS sensor which makes it fun and easy to measure the number of dissolved particles in a liquid.The wiring is simple, at least for Arduino where an adapter is not needed, just connect ground, 5V and analogue to get going. I love the simplicity of following and understanding CQRobot instructions, the code is laid out and explained well and works immediately with no errors and in this case, no libraries needed. I only measured tap water but got accurate readings as the 330ppm reading correlated to the expected readings for average tap water.In all, this is a great simple, functional and accurate sensor for measuring the quality of liquids. This provides the potential for another, exciting new mini-project.

This module is of great quality like everything else this company makes. They always mayor high quality modules that can be used for education. This one can easily be used for education as it involves water testing which involves chemistry. Although on the more pricey end, I’d still highly recommend this company and the modules they produce.I tested this using an Arduino and the libraries that were recommended to download. I had no issues whatsoever and the values seem to be accurate in a water sample that was know to have a certain amount of dissolved solids.Overall, this is a great module which can be used for many projects and has many possibilities. Highly recommend!

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.

This TDS sensor is well designed and constructed and it comes with a complimentary CQRobot wiring loom.It also comes with a robust waterproof sensor probe and you need to remove its white rubber cap to expose the two metal prongs that go into the liquid to be tested.I tested it with my tap water and thankfully, it gave me a reading of well below 100 - which is acceptable.It's easy to set-up and the price is very reasonable. Love it!HIGHLY RECOMMENDED! AAA+++