SKU: 39728020370

DM-2 In and out Digital Display TDS Tester | Inline TDS Meter | HM Digital

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Description

DM-2 In and out Digital Display TDS Tester | Inline TDS Meter | HM DigitalHM Digital DM 2 Commercial In Line Dual TDS Monitor Large LCD Display, Water Resistant Casing and Cables HM Digital DM 2 is a commercial grade monitor measuring TDS feed (input) water vs. product (output) water of a water filtration system at any time. The dual range tds monitor measures from 0 999ppm with a resolution of 1ppm, and from 1,000 to 9,990 ppm with a resolution of 10ppm (indicated by a blinking 'x10' image) for high TDS applications. With

HM Digital DM-2 Commercial In-Line Dual TDS Monitor

Large LCD Display, Water Resistant Casing and Cables

HM Digital DM-2 is a commercial grade monitor measuring TDS feed (input) water vs. product (output) water of a water filtration system at any time. The dual-range tds monitor measures from 0-999ppm with a resolution of 1ppm, and from 1,000 to 9,990 ppm with a resolution of 10ppm (indicated by a blinking 'x10' image) for high TDS applications.

With its shielded cables and diagnostic messaging this robust device is ideal for Reverse Osmosis (RO), Deionized water (DI) filtration systems that work well in applications such as drinking or potable water, Water treatment, Aquariums, Hydroponics and many more.

FEATURES:

  • Highly efficient and accurate due to its advanced microprocessor technology
  • Displays TDS levels of the Feed Water and Product Water with in & out electrode probes
  • Continually Monitors RO System Performance
  • Auto-Off function conserves battery power (Shuts off automatically after 3 minutes)
  • Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. The DM-2 features digital calibration.
  • Diagnostic error messaging
  • Shielded sensor cables

Note: This model requires two (2) tee fittings (sold separately) for installation. Recommended fitting for 1/4" Tube:  F-4UT44QC

DM-2 Specifications

Part #: DM-2
Brand: HM Digital
Alternate Designations: TDS Pro
Dual TDSmeter 2
Dual Range: 0-999 ppm @ 1ppm resolution;
1,000-9,990 @10ppm resolution
Accuracy: +/- 2%
Conversion Factor: NaCl (Avg. 0.5)
Cable Length: 46" Including Sensors (shielded Cables)
Digital Calibration: Factory Calibrated to NaCl 342ppm. Recalibration can be done separately for each line.
Power Source: 2x AA batteries (Included)
Battery Life: Approximately 2 Years
Size: 4.6" x 2.6" x 0.7"
(11.6 x 6.8 x 1.8 cm)
Weight: 7.1 oz (201.3 g)

Applications for DM-2 Dual TDS Monitors for RO Systems

  • Agriculture
  • Hydroponics
  • Cannabis
  • Restaurants
  • Aquaculture
  • Aquariums
  • Drinking Water
  • Food
  • Beverages
  • Ice Makers
  • Labs
  • Industrial
  • Window Cleaning
  • Carwash
  • Wide Variety of Other Applications
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 39728020370

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4.6 ★★★★★
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Beverly Durham
San Leandro, US
★★★★★ 5
Works wonders
Size: M (up to size 9)-Beige
Works wonders for dry feet, like really dry, hard feet.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 23, 2026
T
Verified Purchase
Therapy by the Sea
Battle Creek, US
★★★★★ 4
EXCELLENT FEET MOISTURE PROTECTION
Size: S (up to size 7)-Beige, Size: S (up to size 7)-Beige
Why did you pick this product vs others?: I have burns on my feet and needed something that I could put burn creme on and still walk around in with. I tried other silicone footsie but they would teae really easily. So far these are doing really well for this purpose. They are holding their shape too. The only caution I have is the same with all silicone footsies: They can be slippery on wet floors, so also wear with socks over them. The biggest issues is when they say a size they mean it. The silicone used in these have little give in them, so they won't stretch out and loose their shape. That can be a good thing, or not so good, depending on how well they fit your feet and what your intent is with wearing these. The other issue is if they fit snug around those toes, that tends to be where the first tear in the material will happen. Because of how these are made, the tear is actually more like cracking in the material and once it occurs you won't be able to get much use out of the sock after that. If you are planning to wear them around the house or for long term use, I suggest going up a size or look for the toeless options.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 5, 2025
S
Verified Purchase
Shawna
Pawtucket, US
★★★★★ 3
Silicone socks
Size: M (up to size 9)-Beige
The socks are sized large. The quality of the silicone is good. But they slide around on your feet if you try to walk, making them difficult to use and a bit uncomfortable. Unless you are able to sit for long periods of time the likely will not work well. Recommend looking for a better value.
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Reviewed in the United States on October 27, 2024
A
Verified Purchase
Ann
Fort Morgan, US
★★★★★ 5
Effective
Size: L (up to size 11)-Pink
Fantastic. I put lotion on my feet & wear them when I go to sleep. I often wake up during the night and will remove them to find my feet soft and smooth. They are strong and fit my size 10 womens’ size.
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Reviewed in the United States on March 27, 2026
S
Verified Purchase
Stacy
Houston, US
★★★★★ 1
The shoe size should be smaller 9 is the max and it is still to tight
Size: M (up to size 9)-Beige, Size: M (up to size 9)-Beige
Very tight had to take off my feet in the middle of the night they were cutting off my circulation.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 17, 2026

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