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💧 Stay ahead of water quality—because your health deserves precision.
The HM Digital SM-1 is a compact, battery-powered inline TDS monitor designed for single water lines. Featuring a wide measurement range up to 9990 ppm and advanced microprocessor technology, it delivers precise water quality readings. Its quick-connect fitting allows easy installation in reverse osmosis and other filtration systems, while the auto-off function conserves battery life. Factory calibrated and user recalibratable, it’s the smart choice for proactive water purity management.
| ASIN | B00H1267XY |
| Batteries | 2 LR44 batteries required. |
| Best Sellers Rank | #71,196 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #16 in Water Purification System Accessories #427 in Substance Analysis Instrumentation |
| Brand | HM Digital |
| Date First Available | July 8, 2013 |
| Installation Type | Under Sink |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2.39 ounces |
| Item model number | SM-1 |
| Manufacturer | HM Digital |
| Model Name | SM-1 |
| Package Dimensions | 5.35 x 4.17 x 0.79 inches |
| Package Information | Cartridge |
| Power Source | Battery Powered |
| Purification Method | Reverse Osmosis |
| Special Feature | Built In TDS Meter |
S**S
Replacement.
Replacement meter exact match.
J**.
Great monitor
Great for continuous monitoring water quality of product water on watermarked on sailboat
S**N
Works great and fits perfect
The product has met expectations and was delivered much faster than expected. The setup was simple, and I recommend it to others. I'm sure I'll be buying from you again.
J**L
TDS meter
one of the wires came undone. im pending my replacement.
B**D
Meter does not fit into Tee. Meter was 43% off. TDS is 7 based off 4 other meters, this measure 10
Meter does not fit into Tee. Meter was 43% off. TDS is 7 based off 4 other meters, this measure 10 Company responded in email, wanted to see your receipt first, must be if they provide support. Device should be fairly accurate out of the box bit what can you expect for this price. Will use hand meters, too important to get this wrong (this is used in a desalination RO system on a boat)
Trustpilot
2 weeks ago
3 weeks ago