2024 TDS Meter,Accurate and Reliable,Water Testing Kits for Drinking Water,AMMZO Professional Water Meter,TDS, EC & Temp Meter 4 in 1(Yellow)

First time buying one of these meters and I was surprised how accurate it was I've used it on five different types of water. RO system, tap water, bottled water and old filter water. My RO water system Read 17 after I added a mineral filter it was at 28. Tap water was high 400 in the red and my old countertop single carbon filter wasn't as good as I thought it was and read it 400. Takes an LR44 battery which I have extras for alarm systems at windows and doors they're cheap alkaline to repurchase. I ended up buying a pH meter later which wasn't as accurate and things that will throw you off like the little packets of solution to make to calibrate them that is good maybe if you want to be really accurate but I happen to have some alkaline bottle water that I knew was 8.8 and went from that reading which was maybe 9.2 so I knew it wasn't only awful little bit. The manufacturer on those pH meters should let you know that their calibrated in the factory or should be instead of messing around with solution that you have to mix with distilled water. I like the TDS meter with the light also and goes red when your water is over 50 TDS reading I told my sister about it and she went ahead and purchased one too she uses well water and hers was at 170 but I told her that her water could be contaminated and should get it tested further and recommended those test strips but read those could be very inaccurate as to what I see with sellers on that product. Overall good purchase for the price of $10.99 and will allow me to test my RO water later so I know when it goes higher that I will be changing the filters once a year approximately on three of them. Wish I knew about these meters a long time ago.

Well it’ll open your eyes as to the chemicals and mineral deposits in your water . Must have to decide weather your water filter is protecting your family out of the tap. We tested many types of water for a science fair project and was definitely eye opening as to what city’s are passing as potable water. Small price to know what your putting into your body . Must have

TLDR:Extremely easy to use/read, accurate (as long as you know what your water "should" be), and the additional Temperature and EC features are very helpful.Detailed Review:I got this to measure TDS for my fishtank. Typically, the TDS should be less than 300 ppm. Any higher, and you'll find that your fish or shrimp might get sick. After landscape changes in the tank, the TDS can skyrocket because particles and sediment will enter the water column. I first measured my tap water as a baseline (110 ppm) and then measured my established aquarium (180 ppm). My new fishtank with brand new rocks measured 410 ppm on the first day, but after a few days it read 215 ppm, so I know the TDS won't be an issue if I add fish now!Also, certain types of fish are very sensitive to temperature changes (and changes in water conditions in general), so having a precise temperature measurement device will come in handy. Now I don't really know what the EC should be for tap water or for a fishtank, but my tap water measured 220 us/cm and the fishtank was comparatively much higher, around 400 us/cm. So now I'm aware of a potential problem that could harm my fish, thanks to this device.

This TDS reader is easy to operate. It seems to work well. The readings varied based upon the source of the water. The reading did fluctuate a little, so the accuracy may have a +/- ppm tolerance.

There are virtually zero cons for this product. It’s affordable and gives you insight about the contamination levels of various water sources. I tested my filtered fridge water vs my tap water and discovered it was the same reading at 217 ppm. Filtered fridge water is the same! I also tested reverse osmosis filtered water vs tap water from the faucet and the reverse osmosis had more contamination. I then tested bottled water (Smart Water) and got a great reading of only 37 ppm. If you’re a geek, you’ll love this product. This also may come in handy if you travel to foreign countries to understand the clarity of the water you’re drinking.

I got this TDS meter to compare water types for water that I was going to put into my ice machine. I wanted to make sure that I was using the water with the least possible amount of total dissolved solids, so that the machine will be free from wear-and-tear that might otherwise come with large mineral deposits.The meter worked flawlessly. When I stuck it into my tap water, it turned red (420 mg/l). I hopped over to the spring water (240 mg/l), and it was still red. Then on to reverse osmosis (24 mg/l), where it turned green. I finally checked the distilled water (1 mg/l).Very happy to know that the reverse osmosis is working properly, and that I can rest in peace knowing that my ice machine will have extended life.

I got this digital water meter so I could check the salt Contents in my pool so I would know if I had to add more salt to the pool or not it was very easy to read very accurate and I’ve been very happy with my purchase open I’ll see using it on my water and my Camp to make sure it was still drinkable

The display is not easy to read. The lcd segments are all dark when it is turned on. I have to find the right viewing angle to get a reading. Is it accurate? How could we know? I was a full time Metrologist for 15 years, so I will tell you - To verify accuracy, we need at least two liquid solutions. The ppm of one must be at the low end of the operating range for your instrument. The ppm of the other must be at the high end. If both solutions are displayed correctly, you might have an accurate instrument. You are only verifying 'span' in this step. To check the 'linearity' you would need to add additional, equally spaced test points through the middle of the test range. If you do not test ANY instrument against a known, and/or universal standard, you CANNOT know if it is TRULY accurate. Even then, you need to repeat the test periodically - start with 3 month intervals. Good luck.