---
product_id: 386825514
title: "HM Digital SM-1 1-Stage Inline TDS Monitor For Single Water Line"
brand: "hm digital"
price: "฿2563"
currency: THB
in_stock: true
url: https://www.desertcart.co.th/products/386825514-hm-digital-sm-1-1-stage-inline-tds-monitor-single
store_origin: TH
region: Thailand
---

# TDS Monitoring Compact Size Battery Powered HM Digital SM-1 1-Stage Inline TDS Monitor For Single Water Line

**Brand:** hm digital
**Price:** ฿2563
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate Your Water Game with Precision Monitoring!

## Quick Answers

- **What is this?** HM Digital SM-1 1-Stage Inline TDS Monitor For Single Water Line by hm digital
- **How much does it cost?** ฿2563 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/386825514-hm-digital-sm-1-1-stage-inline-tds-monitor-single)

## Best For

- hm digital enthusiasts

## Why This Product

- Trusted hm digital brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Lightweight & Portable:** Weighs only 68g for easy handling.
- • **Effortless Installation:** Countertop setup for instant use.
- • **Smart Filter Management:** Know exactly when to change your filters.
- • **Versatile Compatibility:** Perfect for any filtration system, including RO systems.
- • **Stay Ahead of Water Quality:** Monitor your water's TDS levels in real-time!

## Overview

The HM Digital SM-1 is a lightweight, battery-powered inline TDS monitor designed for single water lines. It provides real-time measurements of total dissolved solids, ensuring optimal water quality for various filtration systems, including reverse osmosis. With its compact design and easy installation, it's the perfect tool for proactive water management.

## Description

HM Digital SM-1 1-Stage Inline TDS Monitor For Single Water Line

## Features

- Measure the product water at any time.
- Use the monitor to determine when the filters need to be changed.
- Ideal for any water filtration system, including reverse osmosis systems, coolers and much more.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | HM Digital |
| Part number | 343433 |
| Item Weight | 68 g |
| Package Dimensions | 13.59 x 10.59 x 2.01 cm; 68 g |
| Batteries | 2 LR44 batteries required. |
| Item model number | SM-1 |
| Material | Plastic |
| Power source type | Battery Powered |
| Installation Method | Countertop |
| Item Package Quantity | 1 |
| Special Features | Built In TDS Meter |
| Included components | Battery |
| Batteries Included? | No |
| Batteries Required? | No |
| Battery Cell Type | Alkaline |

## Product Details

- **Special features:** Built In TDS Meter
- **Material:** Plastic
- **Included components:** Battery
- **Package information:** Cartridge
- **Installation type:** Countertop

## Images

![HM Digital SM-1 1-Stage Inline TDS Monitor For Single Water Line - Image 1](https://m.media-amazon.com/images/I/41soFBslGcL.jpg)

## Questions & Answers

**Q: Can I just dip the probe in water or does it have to be use with tubing?**
A: You can use this in either way.

**Q: what's the accuracy of the measurement?**
A: Hi Rick A. I expect to receive the item this upcoming Sunday, once I install it,I will give you feedback, I have purchased several items from HM, such as a inline tds and am finding good results as far as accuracy with in 10 tds from the hand held meter.

**Q: can this be used on a 1" copper water main and if so, if I was to insert a 1" copper T, how close does the sensor need to be to the water flow?**
A: Hi, if you are talking about the HM gallons meter, it could be installed with a 1" tee if you can also add a 1/4 fitting either push in type, or a threaded reduced fitting to recieve a push in pvc 1/4 npt. You can also forget the tee and use a pierce fitting on the line that is commonly used to get water to a evaporated cooler. The line should go to the in only feeding the Ro system so your not measuring all of the water being used for everything else. I hope this helps and makes sense.

**Q: What is the size of the display?**
A: It's small... approx. 10mm x 20mm, but it's very easy to read.

## Frequently Bought Together

- HM Digital SM-1 1-Stage Inline TDS Monitor For Single Water Line
- AquaticLife Float Valve Kit for RO & RO/DI Systems
- HM Digital DM-1 In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy,Blue & White

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-04-24*