So this is strange, I have a brs 4 stage 150 GPD rodi filter with a built in TDS meter. The TDS meter reads higher for water going out than for water going in. This morning it read 005 going in and 009 going out. Can anyone shed some light on this ?
Also it should have a one and a two and a three on the tds meter. Make sure the sensors are in fact measuring what stage of the water is that you're wanting measured.
Ex if you want Number One sensor to measure the TDS of your incoming water from tap make sure sensor 1 is placed in line between your tap water and before any filterization Etc