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

Picked one of these up to replace a display that was damaged in transit. Very quick to install and it works perfect. I couldn't ask for more.

Does exactly what it says on the box. It’s much more convenient than a handheld meter because it stays plumbed into the lines. I can check my water quality with a single click while the reservoir is filling. Installation took about 5 minutes. Highly recommend for any home RO/DI setup.

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.

This meter functions fairly well. If the two sensors don't have enough water around them in fitting they read low, so they need careful placement in T fittings. The meter output matches handheld conductivity and its inexpensive. My main issue is the low contrast LCD display that requires direct view and more than ambient light. The product concept is great and it's easy to switch from source water to RO.

The product info provided here doesn't do it justice. It's very easy to install and there's no setup or calibration needed. I'm using it on my RO/DI system for my aquarium. I attached the "In" sensor between the RO membrane and the DI units, and the "Out" sensor after the DI units. This way I can keep tabs on the condition of both parts of the system.

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.

This is awesome. Way better than filling a glass with water then using a pen TDS meter.

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

Works well

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

Fonctionne très bien, me semble à présent indispensable pour lon osmoseur, je contrôle la qualité å la sortie de l'osmoseur et å la sortie de la rėsine. Ça donne un petit côté high-tech que j'adore!