Description
Product Overview
The HM Digital Commercial In-Line Dual TDS Monitor (model DM-2) is a compact, white‑colored conductivity meter built for demanding industrial environments. Measuring just 0.7 x 2.6 x 4.6 inches and weighing only 8 ounces, the device combines a rugged plastic housing with a bright LCD display that shows real‑time total dissolved solids (TDS) values for both feed and product water streams. Powered by two AA batteries—included and rated for up to 13,000 hours of operation—the monitor eliminates the need for external power sources, making it ideal for portable or hard‑to‑reach installations. Dual electrode probes provide simultaneous in‑let and out‑let measurements, enabling operators to monitor water quality changes instantly. The unit’s microprocessor‑driven accuracy, combined with a low power consumption of 3 W, ensures reliable performance across a wide temperature range.
![[Product front view showing all components]](https://www.qolviro.store/wp-content/uploads/2026/07/d997f249dfb24785985862ba33ff8853.jpg)
Usage
Designed for a variety of industrial settings, this dual TDS monitor excels in car wash facilities where water reuse and quality control are critical. It also serves food processing plants, beverage manufacturers, and any operation that requires precise monitoring of water purity to protect equipment and maintain product standards. The compact form factor allows easy mounting on existing piping or integration into automated water‑treatment systems. Because the monitor operates on AA batteries, it can be installed in remote locations without access to mains electricity, such as outdoor wash bays or mobile processing units. The clear LCD readout simplifies on‑site checks, while the dual‑probe configuration provides immediate feedback on the effectiveness of filtration or conditioning processes.
Why Choose Us
HM Digital is a trusted name in water‑analysis instrumentation, and the DM-2 model reflects the company’s commitment to durability and precision. The monitor’s plastic enclosure is engineered to resist impact, chemicals, and UV exposure, extending service life even in harsh manufacturing floors. Each unit undergoes rigorous quality testing to meet ISO‑9001 standards, guaranteeing consistent performance batch after batch. In addition to the robust hardware, HM Digital offers responsive technical support and a comprehensive warranty that covers defects and battery performance issues. Customers benefit from fast replacement parts, detailed user manuals, and online resources that simplify installation and troubleshooting.
Key Features
- Dual‑probe design provides simultaneous feed and product water TDS readings for instant quality comparison.
- Bright LCD display offers clear, real‑time data that is easy to read in bright industrial lighting.
- Long‑life AA batteries (up to 13,000 hours) eliminate the need for external power and reduce maintenance downtime.
- Compact, lightweight plastic housing resists impact and chemical exposure, suitable for harsh environments.
- Dedicated customer support and warranty ensure reliable after‑sales service and quick issue resolution.
FAQ
What types of water systems can the DM-2 be installed in?
The DM-2 is compatible with most industrial water loops, including car wash recirculation systems, food‑processing rinse lines, and manufacturing cooling circuits. Its dual probes can be fitted to standard ¼‑inch tubing or adapted with optional fittings for larger diameters.
How often should the probes be calibrated?
For optimal accuracy, we recommend calibrating the probes every 6 months or whenever a significant change in water chemistry is observed. Calibration kits are available from HM Digital and include reference solutions for quick on‑site adjustment.
Can the monitor operate continuously without battery replacement?
Yes. With an average battery life of 13,000 hours, the device can run continuously for over a year before the AA batteries need replacement. Battery status is indicated on the LCD, allowing proactive maintenance.
Is the LCD display readable in low‑light conditions?
The LCD incorporates backlighting that ensures legibility even in dimly lit areas, making it suitable for night‑time operations or enclosed equipment rooms.
What warranty does HM Digital provide?
HM Digital offers a standard 12‑month limited warranty covering manufacturing defects and battery performance. Extended warranty options are available through authorized distributors.




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