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- Dual Inline TDS Meter DM-1 - HM Digital
Good product By emdrn05 on 5/18/2014emdrn05 would recommend this product to a friendI'm only giving this a 4 because the directions for installing it were lacking. Once I got it hooked up it seems to be working well. Definitely need to have one on your filter.
Must have By Eric on 5/7/2014Eric would recommend this product to a friendYou need this. Takes the guesswork out of filter replacement. Really simple to install and operate. Very nice for the price.
Great product By Richard on 4/20/2014Richard would recommend this product to a friendEasy to install, gives a simple quick way to monitor your filter performance.
How Can You Not Have One By Austin on 4/18/2014Austin would recommend this product to a friendhow do you know what your system is doing are you at 0 TDS? the dual meter tells you what is going in to your DI canister and what is coming out. No more Hoping my RO/DI unit is working right.
Must have item on RO/DI system By Rick on 4/18/2014Rick would recommend this product to a friendThis meter is a great addition to any system. Much easier then a pen type checker. To have confidence in the water going into your tank you need to know if the filter is running as it should be. With this you will know in seconds.
Why didn't I have one when I started!? By TriggerThis on 4/13/2014TriggerThis would recommend this product to a friendA must have!
I didn't have one, almost crashed my tank putting 30TDS top off water in it every day because I didn't know my DI was exhauseted.
Don't have to worry any more
Literally takes 6 seconds to install
WORKS WELL UNTIL CALIBRATION IS NEEDED By NONE on 4/10/2014NONE would recommend this product to a friendGOOD LUCK CALIBRATING FOR THE AVERAGE JOE. AT THIS POINT IMO IT BECOMES DISPOSABLE. FOR THE PRICE AND GETTING SEVERAL YEARS USE IT IS WHAT IT IS.
put a few on your rodi system By Chicago on 3/25/2014Chicago would recommend this product to a friendI love these things. I use two of them on my system. Use for
1. supply water going in
2. water after the pre filters and after carbon
3. after the reverse membrane but beofre the di cartridges
4 last one after the di cartridges to let me know how the final water is.
so easy and great to monitor.
This works really well By Bob on 3/3/2014Bob would recommend this product to a friendHooked this up to my older RO unit and was able to see how well the membrane is performing. Its especially amazing to see the difference between the input and output.
Great addition By Manfred on 2/17/2014Manfred would recommend this product to a friendAnother way to determine when filter changes are needed. You can see the sediment filter and when it gets dirty. You can see the color change in the DI filter but this meter goes beyond that and confirms numerically what you see actually. Just another RODI precautionary measure.
Great Feedback for RO Membrane By Steve on 2/13/2014Steve would recommend this product to a friendI had no idea whether my RO membrane was ready for replacement before installing this TDS meter. It allows you to monitor the performance of the membrane.
Works great By reddog on 2/11/2014reddog would recommend this product to a friendThese seem to work very well. One came on my BRS 5-stage RODI system. It had one line of display missing so they sent me a new one asap. It's great to be able to see your incoming TDS and outgoing TDS on the RODI system.
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Previously Asked Questions
The DM-1 Dual Inline TDS Meter from HM Digital is one of the most important reverse osmosis accessories. This tool monitors the TDS of your reverse osmosis system in two places and lets you know exactly how the system is performing.
BulkReefSupply.com suggests installing the dual TDS meter post membrane and post DI stage. These two readings will notify you when it's time to change the RO membrane and DI resin. This unit features a digital display and comes with two 1/4" John Guest Quick Connect Tee's. As with all HM-Digital products, the DM-1 comes factory calibrated.
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