Dual Inline TDS meter
Not to be compared with cheaper models, this easy to read display measures Total Dissolved Solids in two places.
Recommended installation: Insert one probe (into a Tee fltting) between the RO membrane and the DI section, and the second probe after the DI stage (in a second Tee fitting).
Uses two AA batteries, included. Includes mounting bracket and doublestick adhesive tape.