The best way to measure the performance of a reverse osmosis water purification system is by monitoring the amount of untreated water that comes into the system and comparing it to the amount of purified water that gets out. This is exactly what the TDS Pro PPM Monitor does. In doing so, this PPM monitor will determine the effectiveness of the water filtration system and tell you whether the RO membranes need changing.
The PPM monitor has a display on which the values of dirty and clean water are shown. The user can easily switch between clean and dirty water values that are displayed on the monitor. This model has a ½” inlet and 3/8” outlet. The meters are factory calibrated with a NaCl solution of 342 ppm. It is also very easy to install it comes with quick-connect T-fitting for compatible with the Evolution-RO1000.
You can also get the pro model that has a large display that is water resistant.