Dual Inline TDS Monitor, model DM-1. Measure the TDS levels of two different water lines, such as the tap water and filtered water, at any time.
The DM-1 is an ideal monitor to know if a filter cartridge, resin cartridge or membrane is functioning effectively. Install the DM-1 so you’ll always know how a water filtration or purification system is performing.
Includes: DM-1: Base Unit (LCD Display), 2 x 1/4” T-fittings (standard), 2 x 1.5V Batteries (pre-installed)