HM Digital DM-1 In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy,Blue & White

Works as advertised..

There is no reason not to give this product the highest rating. The price was right, it does exactly what it is supposed to do and it is easy to install. The meter is simple to install; I have mine mounted with clamps right onto the side of the RO gland. Simply push the button for power and select, back and forth if you wish, the input water TDS or the output water reading. The display is easy to read and it turns off by itself. I personally like to stay in the habit of manually turning off equipment when not needed. I checked it with a professional meter and the readings were identical. It is so convenient to use, allowing frequent checks that will keep the water quality up. Don't be surprised, it is smaller than one would expect, but not a problem, its still easy to read from an arms length.

I could hardly believe how easy this instrument was to install. It must have taken me at least two minutes and it was up and running producing accurate results, I checked it with my handheld meter. The display is a little small but that's no big thing. Pun intended.😀 a great buy in my opinion.

I love this tds in line meter. I always know when I need to change my water filters now. It came with everything I needed to hook it up to my aquaticlife RO water lines. It gives a tds reading of the water before and after it runs through my RO filter.

easy to install, easy to read. Only thing is, it would be nice to have a backlight and an option to plug it in to an outlet rather than batteries.

Works great. Does exactly what it was intended to do. No leaks.

Easy to hook up took 5 min tops. Have one probe on waste water and the other after the DI media. Takes the guess work out of when to change DI media!

a must have. this tells me my TDS out of the tap and after my DI unit (0 out tyvm!) :) make sure you install correctly. there is only 1 way to install them into the line to read correctly, so follow the directions! a must have for a reef tank ro/di unit!

洗車用純水器のお手軽数値測定のため導入。すでに純水器2台連結で運用してるのでそれぞれの出口に設置。 そのままでは装着できないのでホームセンターで砲金オネジチーズ、takagiのG1/2メスコネクター、ネジ付き蛇口ニップルを２個ずつ購入。amazonの一緒に購入されてる商品からクイックコネクターも準備。 別途準備したものの方が金額倍くらいかかりました(汗 苦労したかいもあり無事装着でき測定できてます。他レビューから防水ではないみたいなのでモニターの設置場所は検討中です。

Fácil instalar, confiable, me ayuda a ver como esta mi sistema

المنتج سئ ويعطي قراءه غير صحيحه جربته ووضعت مياه في كوب وسجلت قراءه المدخل والمخرج وجدت القراءه مختلفه في نفس الكوب بفرق من 5 ٪ الي10٪ درجه كما انه غالي جدا وهناك منتجات اقل سعر واعلي كفاءه وجوده

Es sencillo de usar. La cslidad parece buena. No necesita regulación

HM is known for making quality instruments for ro/di systems. I own a ro/di system, so it's a must have for me..