| | |  | Water Purification & Testing | Home » » HM Digital Dual Inline TDS Water Quality Monitor | | | | | | | Description: | | Measure the tap water coming in vs. the purified water going out of your water filtratiSPECIFICATIONS Range: 0-9990 ppm Accuracy: ±2% Cable Length: 24.5" (including sensor) Fittings: 1/4" standard, also available with 3/8" or 1/2" Power source: 2 x 1.5V button cell batteries (included) Battery life: approx. 1000 hours of continuous use on system at any time. | | | Features: | |
• Displays TDS levels of the feed water and product water with in & out electrode probes.
• Highly efficient and accurate due to its advanced microprocessor technology.
• Auto-Off function conserves battery power. Automatically after 10 minutes of non-use.
• Comes equipped with John Guest Quick-Connect T-fittings as shown.
• Installs quickly and easily. ..Warranty: Limited Manufacturers 1 Year
| | | Product Details: | | | Product Length:
| 2.0 inches | | Product Width:
| 3.0 inches | | Product Height:
| 1.0 inches | | Product Weight:
| 0.1 pounds | | Average Customer Rating:
|  based on 5 reviews |
| | | | Customer Reviews: | |
Average Customer Review:
 ( 5 customer reviews )
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Most Helpful Customer Reviews
2 of 2 found the following review helpful:
 switch mechanism broke after 1 mo of usage, otherwise greatAug 18, 2011
By HMMWV
"God, Country, Corps"
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 found the following review helpful:
GreatAug 04, 2011
By leilee
"Future Engineer"
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
Great for general use but Critical for Saltwater Aquarium use!Jan 20, 2012
By MongoosC5
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.
Works Perfect!Oct 26, 2011
By Aaron Schultz
I've been using this TDS meter for several months now and it continues to perform well! Knowning when to change my filters on my RODI system for my reef tank is key to getting the maximum use of my filters. If you have an RODI system, I would highly suggest picking one of these up! It was very easy to install.
Essential part of your fishes healthAug 26, 2011
By flea
great item that works jsut as it should. get one for your house and see how bad your water is too
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