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HM DigitalDM-2 Commercial In-Line Dual TDS Monitor, 0-9990 ppm Range, 2% Readout Accuracy

HM DigitalDM-2 Commercial In-Line Dual TDS Monitor, 0-9990 ppm Range, 2% Readout Accuracy

Q: could you please send me the installation schematic?

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%?

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?

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.

4.1/5

Product ID: 425766610

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⚡Auto shut-off after 3 mins

💧0-9990 ppm TDS range

🔍2% readout accuracy

Frequently Bought Together

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

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Description

💧 Stay ahead of water quality with pinpoint precision—because your process deserves the best.

ENERGY SMART - Automatic shut-off after 3 minutes saves battery life and boosts reliability.
DUAL PROBE PRECISION - Simultaneously monitor feed and treated water for flawless quality control.
ULTRA WIDE TDS RANGE - Measures from 0 to 9990 ppm, covering every water purity scenario.
EFFORTLESS CALIBRATION - Digital calibration ensures spot-on readings without the hassle.
QUICK CONNECT CONVENIENCE - 1/4" Mur-lok fittings for fast, secure installation—no downtime.

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 product water. Featuring dual probes, a broad 0-9990 ppm range, 2% readout accuracy, digital calibration, and quick-connect fittings, it ensures precise water quality monitoring for industries like manufacturing, food processing, and window washing. Its automatic shut-off and shielded sensor cables enhance durability and energy efficiency.

Specifications

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

Have a Question? See What Others Asked

could you please send me the installation schematic?

I need my product to be less than 10ppm. would this monitor be suitable considering it sways by +/- 2%?

Perhaps I'm blind but I cannot locate the AA battery compartment. Anyone know where it's located?

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

Common Questions

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Khalid Z.

Great experience from order to delivery. Highly recommended!

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Anita G.

Good experience, but the tracking updates could be better.

2 months ago

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