DM1/DM2 Inline TDS Meter and Dual Probe Water Tester

Check filtration performance without collecting separate samples. This RO water quality monitor compares feed and filtered water through two probes. Its digital display makes both readings easy to review. Choose the correct TDS or EC version for your system.

Key Features

• Dual probes compare two water lines.
• TDS versions read up to 9990 ppm.
• DM2-EC reads up to 9990 µS.
• Listed accuracy is ±2%.
• Factory calibrated for easier setup.
• Available with compatible line fittings.

Why Choose DM1/DM2

Handheld meters require manual sampling. These monitors stay in the filtration line for faster comparisons and easier filter checks. DM2 versions offer a larger display, stronger casing, shielded cables, and digital calibration.

Perfect For

Ideal as an aquarium water tester for RO and DI systems, drinking-water filters, hydroponics, laboratories, fish tanks, and purification equipment.

How to Use

Install one probe on the feed line and one on the filtered-water line. Select input or output and compare the readings. Keep fittings leak-free and clean the probes gently.

Important Model Note

TDS versions show dissolved-solids estimates in ppm; DM2-EC shows conductivity in µS. They do not measure pH, chlorine, bacteria, or drinking-water safety. Confirm the exact version and fitting size before ordering.

Compare Water with Confidence

Choose the correct DM1 or DM2 for convenient in-line monitoring.