HM Digital TDS-3 Handheld TDS Meter with Carrying Case, 0-9990 ppm TDS Measurement Range, 1 ppm Resolution, 2% Readout Accuracy

After a month’s use monitoring drinking water, I've found it accurate and consistent. The unit delivered came with batteries and a carrying case included. Also included was a note from the suppliers asking me to get in touch if I noticed any errors - nice touch. Some reviewers have noted continuing varying read outs. I've noticed something similar when used with hot water but didn't find this a problem as it was mostly used with room temp water. In my opinion, it's accurate to within plus/minus 2%. This is based on ongoing readings given on municipal water, distilled water and stored samples. Granted, these aren't 'standard' samples but over time these samples confirmed the unit's accuracy and repeatability, in my opinion. I bought it to use as a quick check on my Brita water filter's performance and this it did admirably.

I use the product to test my fish tanks and pond water. Also test my tap water.

So far the HM Digital TDS 3 seems to work fine. Only used it once so only 4 stars as I have not had enough time to determine its accuracy, perhaps 5 stars is deserved. It's easy to use one read and so far I have no issues with it.

This appears to be well made. It gives consistent results. I am using it to check the output from my tap water filtration unit, also the TDS in my fish tanks and pond.

Great product! Very helpful product when buying an water filter.It will show precise values of water contamination. I would highly recommend this product!

I've a collection of house plants and many of which prefer rainwater due to all the minerals in our tapwater, I also feared that the flat roof feeding the waterbutt would also have too many contaminants. Was going to give lower marks for accuracy seeing I'm unable to test this currently but, this product can be calibrated should I feel it's needed. Saved me having to buy a reverse osmosis water filtration kit too!

Easy to use, consistent readings, maintains calibration well. Easy to read display.

Worked well for 13 months and the one I received appears to be a genuine product, unlike many for sale on other sites. Then suddenly packed up, despite only being used infrequently and always used carefully and dried before putting away. Batteries were aok and tried replacing to be certain. Now just another piece of WEEE waste and need to find a replacement that will last.