SKU: 39728020370

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

Sale price$55.56 Regular price$61.73
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Ships within 48 hours · Estimated delivery Aug 21 - Aug 26

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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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Vickie Dovel
Port Orchard, US
★★★★★ 5
Easy to put together
Color: Grey, Size: Wheel-6 Panel
Love them
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Reviewed in the United States on December 17, 2025
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Excelente
Chelsea, US
★★★★★ 5
Excelente calidad
Color: Black, Size: Standard - 4 Panel
Excelente
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Reviewed in the United States on June 1, 2026
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DCP
Pawtucket, US
★★★★★ 5
Great value, perfect for our infant room!
Color: Black, Size: Standard - 4 Panel
Great product, sturdy design and easy to build! It is a fairly light weight item, which aids in the maneuverability of the divider. The color was as described and is dark enough to block the light from our sleeping infants! I do love that you are able to see through the slats and see the child sleeping- if you are looking for something with MORE privacy, this is not it. It has great coverage area and is dark and a wonderful value for the price, however, you are able to see through the areas where each panel connects!
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Reviewed in the United States on August 18, 2025
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Tammy Lee Morris
Phoenix, US
★★★★★ 1
Don’t waste your money or time!
Color: White, Size: Standard - 4 Panel
Don’t waste your money. The instructions make no sense and the metal poles are either sized wrong for the product or screw holes are incorrectly placed, but no two poles matched in size and placement making it impossible to put this together without the panels being warped. No matter how I tried to switch the poles to see if I had them wrong, they always turned out warped and incorrectly fit. I finally gave up and threw everything out - I wasted $50 on this junk and because I didn’t try to put it together immediately after I bought it, it is way too late for a refund. Lesson learned!
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Reviewed in the United States on October 1, 2025
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Edward Hugee
West Palm Beach, US
★★★★★ 3
Sturdiness
Color: Black, Size: Standard - 4 Panel
Not so sturdy. It worked well for its intended job, but, it has to be secured to the floor for long term use.
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Reviewed in the United States on March 30, 2026

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