TDS Meter Digital Water Tester, INKBIRD Professional Electronic 3-in-1 TDS, Temperature and EC Meter, 0-4995ppm, Ideal ppm Meter for Drinking Water, Aquariums, and More Lab Viscometers(White)

Skip the cheap TDS meters and get this. I use mine a lot in my shrimp tanks to help me keeping the TDS stable. When my cheapo meter stopped working, I got this. I love the backlit screen and the solid feel. While I cannot say how accurate the TDS measurement is (it's at least similar to my older meter), it measures temperatures accurately. Here, I set my aquarium heater to 25C to heat up 5G of water, and then compared the temperature measurement with my very accurate Fluke DMV readout. Same temperature. I also like that I can use AAA batteries.Just like other users, I had to learn which cap is for the probes and which for the batteries, and just like others, I am clueless as to why I have to press the on-button for several seconds before the display turns on. Other than that, this is a great meter, and I recommend it.

When it comes to measuring and controlling my indoor garden's environment Inkbird is the brand that I trust the most for accuracy, value, quality and endurance. I just purchased a Hypochlorous Acid Generator which requires an accurate ppm meter to achieve the proper ratios - I have a ver expensive TDS meter but I wanted to dedicate a meter strictly for this purpose as I will be making a lot of his solution - When Inkbird came out with this meter I decided to buy it and test it against my expensive meter - The accuracy was exactly the same. This meter is easy to use and read - it is perfect - I have done business with this compny before and their customer service goes above and beyond - I highly recommend this product and company A++++ all-the-way.

I don't have anything to test this against, but it seems reasonably accurate and it settles to a solid reading quickly. iIlike it better than the more expensive one it replaced.

I like how easy it is to use. I don't like how hard it is to get the cap off the probe. I have arthritis and it's really hard to get this cap off. Also the battery cap needs a lock. I opened it by mistake and the batteries flew out.Probe seems accurate in comparison to two other ones I own.

One of the features that I love about this meter is that it takes AAA batteries. The accuracy of this meter is also spot on, which is crucial for me since I use it with my ZeroWater filter to ensure that I am getting the purest water possible. Overall, I would highly recommend the INKBIRD Water TDS Meter to anyone who wants a reliable and easy-to-use tool for measuring the total dissolved solids in their water.

Bought some testing fluid by Blue lab and this thing was off by 0550 which is a lot. Without a way to calibrate there is no way to fix that(figured out how on my own, posted below). I used test fluid to find out it is off.Revised: On the up side I figured out if you press the "hold" and "shift" buttons at the same time you can recalibrate it. Mine needed to be at 122 to read correctly. The us/cm needs to be flash for this to work and on EC mode. Picture included is in calibration modeI'm sticking with the one star because the company that sold this and everybody else would not help me and after failing to return it I decided to figure out if I'm able to take it apart and fix it which is when I was able to find out how to recalibrate it the company would not tell me how to recalibrate it or respond to emails. I had to figure it out on my own I'm sticking with the one star. You should not have to buy an item get no customer service help and literally figure out how to do everything on your own to make the item work. The instructions also failed to tell you how to recalibrate.

Really easy to use, it takes 2 AAA batteries I really like that it has Fahrenheit and Celsius it also tells you how much juice is in your batteries. Its really accurate compared to my other water testers this is a solid little peice.

I purchased this to measure TDS differences between my incoming water and the output from my reverse osmosis system. Incoming water measured around 200-250 and output from the RO system was 2-5. It is easy to use and has a cover over the sensors that can be used for holding water to test. I’ll be using this meter to test my RO system to determine filter change times.