SM-1 and TRM-1 Inline TDS Meter for Single or Triple-Point Water Monitoring

Know how your filtration system performs without repeatedly collecting water samples. Choose the SM-1 for one-line monitoring or the TRM-1 triple TDS monitor for readings at three filtration points. Both models provide clear digital measurements of total dissolved solids in parts per million. This practical RO water quality tester is designed for filtration systems, aquariums, laboratories, and water-treatment setups.

Key Features

• SM-1 monitors TDS from one water line.
• TRM-1 checks three separate points within one system.
• TRM-1 measures 0–9990 ppm with ±2% accuracy.
• Factory calibrated using a 342 ppm NaCl solution.
• Auto-off after 10 minutes helps preserve battery power.
• Includes probe fittings for convenient in-line installation.

Why Choose Our SM-1 and TRM-1 Inline TDS Meter

Handheld testers require manual sampling each time. These monitors stay connected to your water line, making routine filter checks quicker and more convenient. The single and triple-probe options let you match the monitor to a simple filter or a multistage RO/DI system.

Perfect For

Ideal as an aquarium water tester and filtration monitor for reverse osmosis systems, deionization units, drinking-water filters, laboratories, hydroponics, water coolers, and commercial purification equipment.

How to Use

Install each probe at the desired point in the water line using the compatible fitting. Turn on the monitor, select the line when using the TRM-1, and read the TDS value on the digital display.

Important Measurement Note

These models measure TDS, which indicates dissolved solids in water. They do not directly measure dissolved oxygen, pH, or laboratory-grade salinity.

Monitor Your Water with Less Guesswork

Choose the SM-1 or TRM-1 today and make filtration checks a faster part of your routine.