HM Digital DM-1: Commercial In-Line Dual TDS Monitor
in-line TDS monitor · TDS · 2 lines
7.6/10our editorial score
₹2,55015% off
M.R.P. ₹3,000 Save ₹450
Indicative price, verified 2026-10-08. Confirm on the marketplace before buying.
By product type
Best In-Line TDS Monitors for RO in India (2026)
7 products comparedPrices checked Oct 2026Independent · affiliate-funded
We list 7 in-line tds monitors for ro from 1 brand, priced ₹2,065 to ₹7,020, every one from the brand's own Indian store. The highest-scoring is the HM Digital DM-1: Commercial In-Line Dual TDS Monitor at ₹2,550.
An in-line monitor fits into the purifier's tubing with probes on the input and output lines and shows TDS continuously. It is the simplest way to know the day an RO membrane starts to fail, instead of finding out months later.
Scores are calculated from each product's published specifications and price within its own product family; nobody at BestPurifier has tested these products.
Our ranked picks
Filter by price, brand and feature, or sort by price and running cost. Tick Compare on any two to put their specs side by side.
7 water treatment products
- Read full review →
- Read full review →₹2,06524% off
M.R.P. ₹2,700 Save ₹635
Indicative price, verified 2026-10-08. Confirm on the marketplace before buying.
- Read full review →₹2,27516% off
M.R.P. ₹2,700 Save ₹425
Indicative price, verified 2026-10-08. Confirm on the marketplace before buying.
HM Digital TRM-1: Triple In-Line TDS Monitor
in-line TDS monitor · TDS · 3 lines
7.4/10our editorial scoreRead full review →₹5,67010% offM.R.P. ₹6,300 Save ₹630
Indicative price, verified 2026-10-08. Confirm on the marketplace before buying.
HM Digital DM-2EC: Commercial In-Line Dual EC Monitor
in-line TDS monitor · EC · 2 lines
7.3/10our editorial scoreRead full review →₹5,94010% offM.R.P. ₹6,600 Save ₹660
Indicative price, verified 2026-10-08. Confirm on the marketplace before buying.
HM Digital DM-2: Commercial In-Line Dual TDS Monitor
in-line TDS monitor · TDS · 2 lines
7.3/10our editorial scoreRead full review →₹5,94010% offM.R.P. ₹6,600 Save ₹660
Indicative price, verified 2026-10-08. Confirm on the marketplace before buying.
HM Digital DM-3: Commercial In-Line Dual EC/TDS Monitor
in-line TDS monitor · TDS + EC · 2 lines
7.3/10our editorial scoreRead full review →₹7,02010% offM.R.P. ₹7,800 Save ₹780
Indicative price, verified 2026-10-08. Confirm on the marketplace before buying.
Quick comparison
| # | Product | Price | Score | Type & key spec | Best for |
|---|---|---|---|---|---|
| 1 | HM Digital DM-1: Commercial In-Line Dual TDS Monitor | ₹2,550 | 7.6/10 | TDS · 2 lines | Anyone who needs a in-line TDS monitor |
| 2 | HM Digital SM-1EC: In-line Single EC Monitor | ₹2,065 | 7.5/10 | EC | Anyone who needs a in-line TDS monitor |
| 3 | HM Digital SM-1: In-line Single TDS Monitor | ₹2,275 | 7.5/10 | TDS | Anyone who needs a in-line TDS monitor |
| 4 | HM Digital TRM-1: Triple In-Line TDS Monitor | ₹5,670 | 7.4/10 | TDS · 3 lines | Anyone who needs a in-line TDS monitor |
| 5 | HM Digital DM-2EC: Commercial In-Line Dual EC Monitor | ₹5,940 | 7.3/10 | EC · 2 lines | Anyone who needs a in-line TDS monitor |
| 6 | HM Digital DM-2: Commercial In-Line Dual TDS Monitor | ₹5,940 | 7.3/10 | TDS · 2 lines | Anyone who needs a in-line TDS monitor |
| 7 | HM Digital DM-3: Commercial In-Line Dual EC/TDS Monitor | ₹7,020 | 7.3/10 | TDS + EC · 2 lines | Anyone who needs a in-line TDS monitor |
Prices are indicative street prices, last verified 2026-10-08. Always confirm the current price on the marketplace before purchasing.
Frequently asked questions
What is the price of in-line tds monitors for ro in India?
From ₹2,065 to ₹7,020 at the brand-store prices we recorded. Check the live price on each product before buying.