---
product_id: 413870696
title: "HM Digital DM-2 Commercial In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy"
brand: "hm digital"
price: "56121CFA"
currency: XOF
in_stock: true
url: https://www.desertcart.sn/products/413870696-hm-digital-dm-2-commercial-in-line-dual-tds-monitor
store_origin: SN
region: Senegal
---

# 0-9990 ppm TDS range 1/4" Mur-lok quick connect fittings +/- 2% readout accuracy HM Digital DM-2 Commercial In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy

**Brand:** hm digital
**Price:** 56121CFA
**Availability:** ✅ In Stock

## Summary

> 💧 Stay ahead with precision water quality insights that keep your process flawless.

## Quick Answers

- **What is this?** HM Digital DM-2 Commercial In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy by hm digital
- **How much does it cost?** 56121CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/413870696-hm-digital-dm-2-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

- • **Digital Calibration:** Effortless, accurate calibration ensures your readings stay razor-sharp.
- • **Smart Auto Shut-Off:** Saves battery life with automatic power-off after 3 minutes of inactivity.
- • **Dual-Probe Precision:** Simultaneously monitor feed and treated water for flawless quality control.
- • **Quick-Connect Convenience:** 1/4" Mur-lok fittings make installation and maintenance a breeze.
- • **Ultra-Wide Measurement Range:** Covers 0 to 9990 ppm to handle any water purity challenge with ease.

## Overview

The HM Digital DM-2 is a commercial-grade inline dual TDS monitor designed for real-time measurement of total dissolved solids in feed and treated water. Featuring dual probes, a broad 0-9990 ppm range, +/- 2% accuracy, digital calibration, and quick-connect fittings, it ensures reliable water quality monitoring for industrial and commercial applications like manufacturing, food processing, and window washing systems.

## Description

HM Digital DM-2 Commercial In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy

## Features

- Inline total dissolved solids (TDS) monitor to measure TDS levels for feed and product water when used with TDS water filtration systems for applications including window washing systems, manufacturing, and food processing
- Two probes provide readings from feed and treated water
- Monitor has 0 to 9999ppm range, digital calibration, and shielded sensor cables
- Automatic shut-off after 3 minutes
- 1/4" Mur-lok quick connect fittings

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | HM Digital |
| Part number | DM-2 |
| Item Weight | 249 g |
| Product Dimensions | 16.2 x 6.3 x 2.8 cm; 249.48 g |
| Batteries | 2 AA batteries required. |
| Item model number | DM-2 |
| Size | TDS Monitor |
| Item Package Quantity | 1 |
| Display Style | LCD |
| Batteries Included? | No |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |

## Images

![HM Digital DM-2 Commercial In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy - Image 1](https://m.media-amazon.com/images/I/81rI65x2+wL.jpg)

## Questions & Answers

**Q: could you please send me the installation schematic?**
A: To install the DM-2 to a water purification or filtration system:
1. Insert the white sensors fully into the bottom of the T-fittings.
2. Orient the sensor pins so that they are perpendicular to the direction of the T. The water
should flow over both pins equally. (You should be able to see both pins of you look
through the fitting.) 
3. Disconnect the water source.
4. Snip the source (tap) water tube at a point between the source and the filter. Insert both
ends of the tube into the top of the IN line sensor’s T-fitting.
5. Snip the product (filtered) water tube at a point between the filter and a dispenser. Insert
both ends of the tube into the top of the OUT line sensor’s T-fitting. 
6. The DM-2 monitor can be attached anywhere on or near the water system using the
mounting bracket (which can be secured by screws or the adhesive tape).
7. Reconnect the water source. Your monitor is now ready for use.
Hope above information is helpful. Thanks.

**Q: I need my product to be less than 10ppm. would this monitor be suitable considering it sways by +/- 2%?**
A: Found this product very accurate.  I am using this product the quality of R/O water, which is always below 10ppm.  I compared this with another ppm meter that I have which is accurate within 0.002% and got the same reading.  Keep in mind like all ppm meters, accuracy is most commonly compromised by dirty probes.

**Q: Perhaps I'm blind but I cannot locate the AA battery compartment.  Anyone know where it's located?**
A: Unscrew the four metal screws (not the orange plastic screws) on the rear of the unit and remove the back panel. 2. Remove the batteries. 3. Replace both batteries with two fresh AA batteries.  Ensure the polarity is correct. 4. Close the back panel and replace the screws.  You will not need to recalibrate.

**Q: How do you replace the batteries in the dual probe version, (1 or 3 probe versions should be the same)?**
A: Yes

## Frequently Bought Together

- HM Digital DM-2 Commercial In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy
- Lemoy 1/4" OD Quick Connect Push In to Connect Water Tube Fitting for RO Reverse Osmosis Water Filter Fittings Pack of 30

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-02-01*