Water Testing Kits for Drinking Water- 4 in 1 TDS Meter TDS EC & Temperature(°C,°F) Meter,Accurate & Reliable Digital Tap, Well, Swimming Pool,Hydroponics, Aquarium, RO/DI System

To use this meter, you must understand two things. The temperature correction to the TDS reading matters a LOT. And this meter's temperature correction is EXTREMELY slow. The "30 seconds" in the instructions is not nearly long enough if your water and your meter differ in temperature by more than a degree or so. I'm using this to test my tap water. Straight out of the tap, it's about 10 degrees F colder than my kitchen. At first, I thought the meter was garbage, because the readings were all over the place. The longer the water sat around, the higher the TDS reading got. I eventually realized that's because the water was warming up. Now, I take a sample, let it warm to room temperature, and the meter is extremely consistent from reading to reading. Bottom line, if you think the readings from this meter aren't stable, then consider "operator error" as a possible cause. I feel that I got far more than my money's worth, for $6 or so. But for $6, you get a meter that's reasonably accurate, but very slow. This meter does, eventually, make a temperature correction to the reading. But, it does so extremely slowly.

Easy to use great quality

Checked my water at 3 different sources and came up with a reading +/- 3 ppm, so at least the results are consistent. Accuracy is unknown. Reading seems a little low (220pm), have super hard calcium/mag rich well municipal water stains everything. Gonna try with a bottle of distilled water.

I bought this to replace the one which came with my ZeroWater pitcher (after replacing it once with the original). This is much better because it has a replaceable button battery (the battery case can be difficult to open). It's as simple to use as the original and easy to read. It's great value for the money.

This water tester is a must living a region with hard water. Super quick and intuitive to use: I have been able to measure effectiveness of filter replacements or an RO upgrade.

The item works decently. When testing different water the TDS seems to be accurate or at least close. The temp doesn't work though. I can go from refrigerated water to tap water and it is exactly the same temp. Really wish the temp worked but the unit is easy to use. Display is large enough to read.

Very simple to use. Consistent readings. Tested bottled RO water w some minerals added back at 23 TDS. Our city water coming from our sink is 467 tds. fridge reading (w a carbon filter) read 25% less. Supposingly, TX allows up to 1000 TDS but it is 300+-deep water we are now drinking; something we did not drink b4 electricity and deep wells. Trying to reduce TDS to 200 or less AND not use RO water. Absolute best setup and what kind of water is best for my family is hard to assess but this tool gives me enough info to test filters' ability to reduce TDS.

I love this it was simpler than I thought it would be to use and utilize I like to thank you for this product

Pretty accurate reading. But no backlight as shown in the pictures.