Measures unpurified water PPM going into reverse osmosis (RO) system and purified water PPM coming out. Monitors the performance of your RO system. Instantly displays values and allows you to switch back and forth between dirty and clean water TDS. Indicates when it’s time to change the RO membranes. Designed with ⅜" inlet fitting and ¼" outlet fitting, to be used with the Stealth-RO™. Can also be used with other systems that have ⅜" and ¼" tubing.

• Part Number: HL 19006