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Product Details
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Product Description
HM Digital device uses electrode probes to monitor input TDS and output TDS in your RO unit or other water purification system to determine when filter cartridges need replaced. Advanced micro-processor takes accurate readings. Factory calibrated for ultimate performance. Installs quickly and easy with quick connect T-fittings.
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Most Helpful Customer Reviews
2 of 2 people found the following review helpful:
4.0 out of 5 stars
switch mechanism broke after 1 mo of usage, otherwise great,
By HMMWV "God, Country, Corps" (santa clara, CA USA) - See all my reviews (TOP 100 REVIEWER) (VINE VOICE)
Amazon Verified Purchase(What's this?)
This review is from: HM Digital DL-1 Dual TDS Meter MTR-TDS-DM1-0-9990-4 (Misc.)
This is a very simple always ready (not always on) tds meter. I had an old RO system and this showed me it was only dropping the TDS by 90-100 ppm (e.g. 300 ppm in, 200 ppm-210ppm out) while the "hard" water at my parents' house 5 miles away was 100 ppm! The result was a purchase of a new RO system with some enhanced features.What broke was the ability to switch from IN (feedwater) to OUT (RO water) without powering off and back on. For the first month you could slide the switch from in to out and the display would change. Later that quit and it became necessary to power it off and back on. Still at the pricepoint its a good value - a good design (the probes mimic 1/4" tubing and it uses off the shelf T connectors to ensure leak free joints). Its accurate compared to my more expensive TDS meter and will now allow me to keep an eye on the RO system. BTW - new RO system has 300 ppm feedwater from the city well system (and clear filter housings so you can see all the junk being trapped in the first 2 days) - it's getting the same 300 ppm IN and yielding 15 ppm - 16 ppm out which is the best i've seen. Most RO water systems do good at 40 out so I was impressed with 15-16 ppm. Without the DL-1 you'd never know when to change filters etc. It's worth buying and the power on/off is no big deal since it times out anyways. If I bought one again I'd get the DL-2 which amazon doesn't sell now. FYI the system I finally chose to buy was the 100 GPD Reverse Osmosis 6 Stage Permeate Pump & UV sterilizer
1 of 1 people found the following review helpful:
5.0 out of 5 stars
Great,
By leilee "Future Engineer" (texas) - See all my reviews
Amazon Verified Purchase(What's this?)
This review is from: HM Digital DL-1 Dual TDS Meter MTR-TDS-DM1-0-9990-4 (Misc.)
Great product wasnt sure if I needed to replace my filters for my RODI unit. So instead of just spending 40 bucks on filters I bought this for under 30 dollars and was reading 0 on output and 180 in input. So I saved money not buying filters that I didnt need yet and no more wondering what the water reading is
5.0 out of 5 stars
Great for general use but Critical for Saltwater Aquarium use!,
Amazon Verified Purchase(What's this?)
This review is from: HM Digital DL-1 Dual TDS Meter MTR-TDS-DM1-0-9990-4 (Misc.)
Super easy to install and use!Lets you see when its time to change the filter(s) which is great for those who use RO for drinking/cooking/etc, but Critical if you use your RO water for a saltwater aquarium! I have my RO unit plumbed to a sink outlet as well as one 220 gallon saltwater fish aquarium and one 80 gallon reef tank with numerous corals. Very nice knowing when the filters need to be changed. Keeps my water tasting great and my tanks healthy.
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