HM DigitalTRM-1, 3X 1/4" Tee, Triple Inline TDS PPM Monitor/Meter

This is exactly what I needed for my ro system.

Easy installation and it can with instructions. Accuracy was good with With my other test kits so I had no issues.

1 lead would've been enough rather than 3 as this is for the permanent install on our rodi filter. After a hundred gallons I decided to use the handheld tds meter to see that we're still getting 0 tds like this was whenever I installed this triple tds monitor. It read 127 ppm tds yet this triple set has been giving a reading of 0 tds from the start, but I always use 2 other handheld tds meters to see that I'm do/not doing it successfully. But lazy after many health problems showing something else went bad. I checked the orientation of the metal probes so the water passed between these probes and that they weren't aligned one behind the other, that wasn't the problem. So I don't know exactly what was giving me a false before I changed the old rodi insert elements, but but now after I put new ones in its still giving me 0 tds just as it should but now I have to always make a final check with one of my handheld devices that I know is as close to exact settings. No.., I certainly Don't/Cannot trust the HM inline tds unit offered here on this page. This device/my device has never received any neglect no careless handling and no run down batteries however I am replacing them so I can rule that out. Had I suspected that this unit was defective from the start I certainly sent it back for an exchange, my Corals inverts and fish are okay, but the Fact is that this HM Triple tds I received had to be defective. You should always a a second method of double checking the first results. Make certain you are getting what you pay for. HM should give me a working device or atleast a percentage off.Truly, no accuracy.

It's nice to see the TDS values without having to sample and test.A quick push of the button and I'm done.I'll record the reading occasionally so I can track the filter performance.It would be nice if this system had a history capability.I use this system just for drinking water, not an aquarium.Our street water here in Citrus county Florida tests at 96 ppm.Our four stage R/O alone, only brought the TDS down to 5.0 on all new filters.We added a resin system which brought the TDS level down to ZERO.No detectable flavor in this water whatsoever.

Shipped quick in simple packaging. Batteries included. I installed to read tap water before it enters the filter, after the RO filter but before the DI filter, and lastly the final output. I verified and compared all readings with my handheld TDS meter.Dead on.

I cannot verify the accuracy, value or ease of installation as the T-fittings shipped with the device are incorrect. The probes do not reach the bottom of the T-fitting to be in the stream of the water. As of this moment, I have a useless item unless I go buy more T-fittings that actually work.I have messaged the seller to ask how this will be corrected. I will update my comments only after I hear back from the seller.

This enables one to monitor the TDS in 3 places, for example feed water, after the RO membrane and after the DI. Well made, easy to use and works well.

Works exactly like I wanted it to. Now I have a better view of filter efficiency at the different stages of RO/DI.

S'installe sans problème dans le circuit d'osmose. Après vérification, il y a avait une légère erreur de mesure, il a fallu l'étalonner avec une solution adaptée. Une fois fait, fonctionnement parfait.