---
product_id: 51212608
title: "Commercial in-Line Dual TDS Monitor"
brand: "hm digital"
price: "¥14686"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/51212608-commercial-in-line-dual-tds-monitor
store_origin: JP
region: Japan
---

# Dual in-line TDS measurement 13,000-hour battery life Advanced microprocessor tech Commercial in-Line Dual TDS Monitor

**Brand:** hm digital
**Price:** ¥14686
**Availability:** ✅ In Stock

## Summary

> 💧 Monitor Like a Pro — Never Miss a Drop of Quality!

## Quick Answers

- **What is this?** Commercial in-Line Dual TDS Monitor by hm digital
- **How much does it cost?** ¥14686 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/51212608-commercial-in-line-dual-tds-monitor)

## 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

- • **Built for Industry:** Rugged, water-resistant casing and quick-connect T-fittings make installation and maintenance effortless in demanding commercial environments.
- • **Stay Powered Longer:** Includes 2 AA batteries with an impressive 13,000-hour lifespan, minimizing downtime and maximizing productivity.
- • **Crystal Clear Display:** Extra-large LCD screen offers easy-to-read measurements at a glance, perfect for fast-paced industrial settings.
- • **Precision You Can Trust:** Dual electrode probes deliver real-time TDS readings for both feed and product water, ensuring flawless water quality control.
- • **Flexible Mounting Options:** Variable mounting bracket adapts seamlessly to your system setup, from car washes to food processing lines.

## Overview

The HM Digital DM-2 Commercial In-Line Dual TDS Monitor is a compact, industrial-grade device designed for precise measurement of total dissolved solids in feed and product water. Featuring advanced microprocessor technology, dual electrode probes, a large LCD display, and a durable water-resistant casing, it ensures reliable water quality monitoring across various commercial applications such as car washes, manufacturing, and food processing. Powered by included AA batteries with an exceptional 13,000-hour life, it offers hassle-free, continuous operation.

## Description

Commercial In-Line Dual TDS Monitor DM-2 with Advanced Microprocessors.

## Features

- The Dm-2 Tds Meter Installs On Industrial Systems Such As Car Washes, Window Washing, Manufacturing, And Food Processing
- The Commercial In-Line Dual Monitor Is Highly Efficient And Accurate Due To Its Advanced Microprocessor Technology
- This Dual Monitor Displays Total Dissolved Solids Levels Of The Feed Water And Product Water With In And Out Electrode Probes
- Brand Name: Hm Digital

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | HM Digital |
| Part Number | DM-2 |
| Product Dimensions | 1.78 x 6.6 x 11.68 cm; 226.8 g |
| Batteries | 2 AA batteries required. (included) |
| Item model number | DM-2 |
| Size | 4.6" 2.6" 0.7" |
| Colour | White |
| Material | Plastic |
| Shape | Rectangular |
| Wattage | 3.00 |
| Item Package Quantity | 1 |
| Display style | LCD |
| Plug profile | Wall Mount |
| Special Features | Industrial Applications, Advanced Microprocessor Technology, Auto-Off Function, Water-Resistant Casing, Extra Large LCD Display, Longer Waterproof Shielded Cables, Variable Mounting Bracket, Quick-Connect T-Fittings |
| Usage | Commercial |
| Batteries included? | Yes |
| Batteries Required? | Yes |
| Average Battery Life | 13000 Hours |
| Item Weight | 227 g |

## Product Details

- **Brand:** HM Digital
- **Screen size:** 3.1 Inches
- **Resolution:** FHD 1080p
- **Aspect ratio:** 16:9
- **Screen surface description:** Glossy
- **Image contrast ratio:** 1
- **Refresh rate:** 60 Hz
- **Power consumption:** 3 Watts
- **Display resolution maximum:** 1920 x 1080
- **Special feature:** Industrial Applications, Advanced Microprocessor Technology, Auto-Off Function, Water-Resistant Casing, Extra Large LCD Display, Longer Waterproof Shielded Cables, Variable Mounting Bracket, Quick-Connect T-Fittings

## Images

![Commercial in-Line Dual TDS Monitor - Image 1](https://m.media-amazon.com/images/I/71p9etz0vAL._AC_UY218_.jpg)
![Commercial in-Line Dual TDS Monitor - Image 2](https://m.media-amazon.com/images/I/71p9etz0vAL._AC_UY327_FMwebp_QL65_.jpg)
![Commercial in-Line Dual TDS Monitor - Image 3](https://m.media-amazon.com/images/I/71p9etz0vAL._AC_UY436_FMwebp_QL65_.jpg)
![Commercial in-Line Dual TDS Monitor - Image 4](https://m.media-amazon.com/images/I/71p9etz0vAL._AC_UY545_FMwebp_QL65_.jpg)
![Commercial in-Line Dual TDS Monitor - Image 5](https://m.media-amazon.com/images/I/71p9etz0vAL._AC_UY654_FMwebp_QL65_.jpg)

## Questions & Answers

**Q: Why does the description not show the size lines for in and out this unit will fit?**
A: Fittings Size (1/4"  TEE fittings)In case you need a bigger  size fitting 3/8" for example  we carry  it ,you can search  the following  item B00TG08TQM  H2o4u

**Q: What t fittings do I need to put this inline of my 3/4” pex? I’m assuming a few different fittings.**
A: I am sort of going from memory, but I bought the white, I think teflon, fittings that are readily available at big box stores like Home Depot and Lowes. I believe the fitting provided is 1/4" so you need a pex fitting that fits the size of you pex pipe, but the "T" piece needs a 1/4" to take the one provided.  I don't remember any particular difficulties, but in fact I was attaching to 3/8 white plastic tubing, so I needed a different "T" piece from the one you require.  Its all a matter of finding the right "T" piece.  I took a quick look, and the pex fittings are all compression fittings, so you might have to put a plastic loop with a t piece in the middle to take this device.   Lots of ways to skin a cat.

**Q: How long are the cables? And is it for 1/4" ID RO line?  Your missing the basics in the description**
A: On the unit I purchased, the cables are approximately 45" long.  It includes two "T" fittings for 1/4" RO/DI lines.

**Q: is this available with 1/2'' x 1/2'' x 1/4'' tee fitting? i need the probes to go to 1/2'' tubing**
A: You can purchase 1/2 x 1/2 x 1/4 push-in fitting tees to replace the ones that come with it. I'm doing the same thing with a DI system for my detailing business.

## Frequently Bought Together

- Commercial In-Line Dual TDS Monitor
- HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy
- HM Digital C342 TDS and EC Calibration Solution, 342 ppm (NaCl), 90 ml Volume, Transparent/Blue

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.jp/products/51212608-commercial-in-line-dual-tds-monitor](https://www.desertcart.jp/products/51212608-commercial-in-line-dual-tds-monitor)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-22*