TDS Meter Digital Water Tester, Professional 3-in-1 TDS, Temperature and EC Meter with Carrying Case, 0-9999ppm, Ideal ppm Meter for Drinking Water, Aquariums and More

I use this to check my RO system. This works great.

I tried it and it's very easy to use. Changing battery is easy too. It takes a Flat battery (idk what their called tbh but it's almost the size of a dime)

Works well, good price.

Its easy to use, easy to measure the purity of the water abd it the same time scary because lots of water including tap water is not for human consumption.Will recommend to anyone. Get it as a Christmas gift.

as I expected

I use this for my Zero Water Filter setup and is a quality product for the money it has a hydrophobic surface that makes it easy to get the water off for storing after testing water

Overall, this appears to be a solid TDS reader. It is lightweight, easy to read, and the background colors are incredibly helpful (green for safe, red for nope don't drink it).The reason for my 3/5 star rating has to do with the accuracy. I tested the tester (say that 10 times fast) on water from my sink in a clean cup. After noting the first value, I ran several consecutive trials. The initial value wasn't replicable & often varied in a range between 1 to 20 from the initial value. Over the course of several days I tested it on a number of differing water sources, again with varying results. The values did stay within a certain range, however.Initially I had wanted to return it, but then ultimately realized that despite the lack of consistency in the readings it is good enough for what I am using it for, which is testing water from my ZeroWater filter to determine when to change the filter. This is because the TDS reader included with ZeroWater filters is wildly inaccurate & obviously poorly made. I found that when relying on the ZeroWater TDS reader to know when to change filters, my water starts tasting like fish... But when using this water tester & taking the average of 3 trials, I am able to change the filter before I start tasting that gross fishy taste.Overall, for a consumer's average use that doesn't require extreme accuracy, I would recommend this product.Please note that your mileage may vary & my own tester's variability could be attributed to a variety of things including a manufacturing defect, overheating due to shipping, or user error.Thanks for reading & I hope my review helps you! :)

Awesome