Most Accurate So Far 4-in-1 Instant Read TDS Meter - Measures TDS, EC, & Temperature (°C/°F) - Digital Water Testing Kit for Tap, Well, Pool, Hydroponics, Aquarium, RO/DI System -Blue

Water Ecology manager found this brand particularly dependable & accurate thru independent comparisons.

Nice little water tester for the money. Great to see where your tapwater stands in level of purity. Also, good to know that the bottle watered. I’ve been drinking from Walmart has a very high purity level. Also great to use on your refrigerator filter to see if the water is actually being filtered or not or if you need to get a new filter.

Easy to use, gave expected results

It's cheap and works,But there are small issues, I am not sure if it is by design or on purpose.It only works if I take off the back cap. If I push in the battery will not turn on, and no power at all.

Such a good buy for the price I paid. Great quality to check drinking water. It comes with a case and is easy to carry around. I love that it has a color indicator too. Can’t beat the price on this one. Highly recommend.

Would not work have to manually press battery to circuit bracket not tight

Looked great. Had a darn nice plastic case. Even had a small user guide and spelled correctly with decent grammar. I pulled out the plastic tab to allow battery (that was included) to open the electron floodgate. Once tab was removed, on came the lights. I gently slid the battery cap back into place. Lights out. I remove bat cap... lights on. Really gently reinserted. About 70% of the way in, off again. It's like a feature that sucks. Would much prefer an auto-off, or I would be glad to press the OFF button.Star Suckers:If you don't fully insert the bat cap, the unit no longer fits into the cool plastic case. If you push the cap all the way, fits great. 5 stars, now 4. yes, i cuda used duct tape, but that just seemed wrong. like eating an unsliced foot-long steak hoagie in a new car.Next time you need some TDS nums: Pull out a tiny flat blade screwdriver, that darn lil cap isn't spring loaded. You'll need to wiggle it out. Fingernails -- useful, only if you need a reason to get a manicure. Sadly, no mention of this in the manual. Result: Mood light sets in. 4 is now 3.However, it was not all that pricey and if you need a quick TDS num, it did just fine. why fine? i ordered a similar unit from diff manufacturer. readings avg'd about 40 ppm apart. based on that, if random 2nd is in same ballpark, it's not holy-cow moment, but it's not nuthin. if my TDS was 50, a 40 ppm diff wud be a deal breaker. but my TDS avg was 480, so a small % swing, no biggie. had there been a huge disparity, both wud have been reboxed for my next white elephant party.

Works great and very accurate. Easy to read display. It was a little tricky removing the battery saver tab at first to get it started then it’s worked great.