SKU: 82277202414

DM-1 In & Out digital display TDS Tester | Inline TDS Meter | HM Digital

Sale price$38.69 Regular price$42.99
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Ships within 48 hours · Estimated delivery Aug 9 - Aug 14

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Description

DM-1 In & Out digital display TDS Tester | Inline TDS Meter | HM DigitalHM Digital DM 1 Dual In Line TDS Monitor The DM 1 is a user friendly monitor measuring feed (input) water vs. product (output) water of a water filtration system at any time. This device is ideal for Reverse Osmosis (RO), Deionized water (DI) filtration systems that work well in variety of application such as drinking or potable water, Aquariums, Hydroponics and many more. Installs quickly and easily Displays TDS levels feed water and product water


HM Digital DM-1 Dual In-Line TDS Monitor


The DM-1 is a user-friendly monitor measuring feed (input) water vs. product (output) water of a water filtration system at any time. This device is ideal for Reverse Osmosis (RO), Deionized water (DI) filtration systems that work well in variety of application such as drinking or potable water, Aquariums, Hydroponics and many more.

  • Installs quickly and easily
  • Displays TDS levels feed water and product water with in & out electrode probes
  • Efficient and accurate with advanced microprocessor technology
  • Auto-Off function conserves battery power. (Shuts off automatically after 10 minutes of non-use)
  • Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver.
  • Equipped with Automatic Temperature Compensation (ATC)

DM-1 Specifications

HM Digital Part #: DM-1
Range*:

0-999 ppm and 0-9990 ppm
Accuracy: +/- 2%
Conversion Factor: NaCl (avg. 0.5)
Cable Length: 24.5" (including sensor)
For use with Fittings: 1/4" quick connect (sold separately)
Power Source: 2 x 1.5V button cell batteries (LR44 or equivalent; included)
Battery Life: Approx. 1000 hours of continuous use
Size: 3" x 0.8" x 1.9" (7.6cm x 2cm x 4.7cm)
Weight: 2.8 oz (79.4 g)

*Dual Range: Range 0-9990 ppm (From 0 – 999 ppm the resolution is 1 ppm. From 1000 to 9990 ppm, the resolution is 10 ppm, indicated by a blinking ‘x10’ image.)

 

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: 82277202414

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Amie Johnson
Lake Worth, US
★★★★★ 5
Actually works
Amazing, got rid of my white heads on my chin and cheeks within 4 days of use so now I just have to keep up with it. I've struggled finding good stuff that actually works
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Reviewed in the United States on May 26, 2026
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Noelle
Phoenix, US
★★★★★ 5
Glowy, Smooth Skin After Use
I love the Dr. Melaxin Peel Shot Glow Rice Toner! After using it, my skin feels tighter, smoother, and refreshing. I’ve noticed my acne has cleared up significantly, and my skin has a healthy glowing look afterward.
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Reviewed in the United States on May 26, 2026
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JR
Houston, US
★★★★★ 5
So Gentle on Skin – Switched from Witch Hazel
I’m honestly obsessed with this. It’s incredibly soft and gentle on my skin, and I find myself reaching for it over everything else now. I used to use witch hazel, but this is much less harsh and feels a lot more comfortable on my face. Since switching, my skin just feels calmer and more balanced. I’ve officially made the switch—highly recommend if you’re looking for a gentler alternative to traditional toners.
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Reviewed in the United States on April 26, 2026
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Brawn
Cuba, US
★★★★★ 5
Works well! I feel renewed
I won't share a video but I will tell you it works. Makes my face feel fresh and soft. Blackheads aren't gone but I think it will continue to improve my skin each time I use it
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Reviewed in the United States on October 26, 2025
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Amparo Santel
Lake Worth, US
★★★★★ 5
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Reviewed in the United States on May 11, 2026

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