TDS Meter, Digital Water Tester - Accurate and Reliable, Measures TDS, EC & Temperature (°F/°C), 0-9990ppm, Water Test Meter for Drinking Water, RO/DI System, Aquariums, etc​​

We bought this to aid in hot tub maintenance. It's one of those little details you don't often get told about, nor is it in any booklets you receive with the tub, but it's something you'd like to routinely monitor for water quality. This seems to work quite well too. Used it twice, and though it varies from the pool stores meter when running full tests, I am to believe this might actually be more accurate too. It's also a great deal for the price, and will save time vs. having to run a sample to the pool store which is closed before I even get out of work. Simple to use, no calibrations, no chemicals. Definitely helps make maintenance a little easier, and that gives you a little more piece of mind too.

This is a much higher quality water tester than the one that comes with Zerowater. It seems to be more accurate, and displays a green light for good readings and red light for bad readings, making the functionality really great. Fantastic value for the money. - Mark Robbins

It’s easy to use.

Tests μS/cm (A measurement of conductivity). An indirect measurement of total dissolved solids like metals, minerals and salts. And measures PPM (Parts per million of very dilute concentrations of substances in water. PPM substances depend on what type of water you are testing but in this case measures TDS (Total dissolved solids) in drinking water.I know that it works accurately because you can compare your readings to water quality reports for your local water through EPA or Utility District Water Reports online. Interestingly, the claims made by our City and County exactly matched the reading range on this device. We have the second cleaest drinking water in the U.S. according to the EPA. This verifies the readings as reported are accurate.You can ignore the color coded lights, red does not mean bad water. Compare that to the EPA and other reports. It will often show red even in perfectly clean water. The readings are good and well within the range to claim it is an accurate tool. Just ignore the red and green lights.On a side note we also use a Primo water dispenser. Tested that water and it comes in at 3 PPM. You cannot get cleaner water.

This is a very good and effective item and it is value for money it is functional and of good quality

The instructions are easy to understand and navigate. I tested untreated well water, softened, reverse osmosis and bottled purified. Tested 3-4X on all the waters and had very consistent results.

It test water quality but it is confusing, in terms of functionality bc it has a red or green backlight but i dont think that has anything to do with water quality rather TDS. I can not 100 percent confirm the accuracy bc I doont know much about TDS and only have 1 tester. its build its decent but the battery cap sometimes fall off. it did come with a cute carrying case. it reads almost instantly so there is no wait time for results and overall not bad of value for money.

Works great. Tested distilled water as a baseline, tap water, filtered water out of the front water dispenser of my fridge, bottled purified water and bottled spring water.Results seemed accurate though I was surprised to see that the bottled spring water scored about the same as tap water. Thinking that I will be reaching for that bottle of purified water instead...