SKU: 92150993446

SM-1 HM Digital In-Line Single TDS Monitor

$38.69 $42.99
Save 10%
No.2 Bestseller on watersyst.com >

Pay in installments of $10.75 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 14 - Aug 19

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

SM-1 HM Digital In-Line Single TDS MonitorHM Digital SM 1 In Line Single TDS Monitor Ideal for monitoring the performance of a home RO water treatment system. The SM 1 is provides an easy to read single line TDS monitor that provides a digital readout. It is ideal for any water filtration system, including reverse osmosis systems, coolers and much more. Features of HM Digital SM 1 Total Dissolved Solids Meter Displays TDS level of a single water line Efficient and accurate Auto Off function


HM Digital SM-1 In-Line Single TDS Monitor

Ideal for monitoring the performance of a home RO water treatment system.

The SM-1 is provides an easy to read single line TDS monitor that provides a digital readout. It is ideal for any water filtration system, including reverse osmosis systems, coolers and much more.

Features of HM Digital SM-1 Total Dissolved Solids Meter

  • Displays TDS level of a single water line
  • Efficient and accurate
  • 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.
  • Installs quickly and easily

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

*The SM-1 has a 3 digit display. For measurements of 0-999 ppm, the resolution is 1 ppm. From 1000 to 9990 ppm, the resolution is 10pm, and is indicated by a blinking x10' image.)

 

SM-1 Specifications

Model: SM-1
Brand: HM Digital
Measures: Total Dissolved Solids (TDS)
Measurement Unit: Parts Per Million (PPM)
Range: 0-9990 ppm*
Resolution:

 0-999 ppm: 1 ppm
1000 - 9990 ppm: 10 ppm
Accuracy: +/- 2%
Cable Length: 24.5" (including sensor)
Fittings: Not included. Requires 1/4" QC tee.
Power Source: 2x 1.5v button cell batteries (LR44 or equivalent); included
Battery Life: Approx. 1000 hours of continuous use
Size: 3" x 8" x 1.9" (7.6 x 2 x 4.7 cm)
Weight: 2.8 oz (79.4 g)
Conversion Factor: NaCl (avg. 0.5)



 

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: 92150993446

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.3 ★★★★★
Based on 23 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
L
Verified Purchase
LT
Massapequa, US
★★★★★ 5
Wonderful
Scent: Unscented, Size: 20.3 Fl Oz (Pack of 3)
Love love this lotion. I have very dry skin and this is perfect. Absorbs well and feels great!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
S
Verified Purchase
Shellybb
Lexington, US
★★★★★ 5
Leaves skin clean and soft
Size: 4.98 Fl Oz (Pack of 1)
Leaves skin clean and soft and much to my surprise did not make my skin break out even though more traditional cleansers often do. This is a really nice product, better than more expensive department store brands I've tried.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2026
C
Verified Purchase
Courtney
Fort Morgan, US
★★★★★ 5
Amazing product that I continue to order again and again!
Size: 4.98 Fl Oz (Pack of 1)
Amazing product that I continue to order again and again! I love the formula of this product! It is perfect for using as a first wash to gently remove makeup or dirt build up before washing with another cleanser. It is great for people with dry skin or if you wear a lot of powder makeup or powder on top of foundation, and it is great for removing mascara and heavy eye makeup as well. It is great for sensitive skin, and I feel like it is super gentle & made with clean ingredients. Bioderma is a brand I trust, and this is a product I will continue to restock!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 5, 2026
A
Verified Purchase
areale
Massapequa, US
★★★★★ 5
On My 5th Bottle – That Says It All
Size: 4.98 Fl Oz (Pack of 1)
This is my fifth bottle of Bioderma Sensibio Micellar Cleansing Oil, and that alone should say how much I love it. It removes makeup effortlessly, including stubborn mascara and long-wear products, without irritating my skin. The formula feels gentle and nourishing, not heavy or greasy. It rinses clean and leaves my skin feeling soft and balanced rather than stripped. I appreciate that it works well even on sensitive skin and doesn’t clog pores or cause breakouts. It has become a staple in my routine, and I keep repurchasing because it consistently delivers. Highly recommend if you want an effective yet gentle cleansing oil that truly works.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 1, 2026
R
Verified Purchase
rodistic
Boise, US
★★★★★ 4
Ideal for double cleansing
Size: 4.98 Fl Oz (Pack of 1)
Removes makeup and sunscreen just fine, although it doesn’t remove my nyx eyeliner. Does not foam, turns into a milky texture. Leaves a slignt oil film over the skin after removing with water, warm water seems to remove it a little better. I don’t mind too much since it’s the first step to my nightly double cleanse, I go over with another cleanser after. I like that it doesn’t leave my skin feeling tight after.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 8, 2026

recommand products

Duotone Pop Up Frame (poles only) 2024
99.99
Duotone EPX Boom Frontend Closing Lever 2024
12.90
Duotone Sail Super_Hero M+ 2022
624.50
Duotone Spirit Back Wing Screw Set 255 (SS22-onw) (2pcs) 2024
12.95
Fanatic Drop Stitch Cross Cut Sample 2023
199.99