tangir1":3i42m3yl said:Did you use it on distilled water? As mentioned above, tap water should give you 50-120ppm, and RO should give you around 10ppm, and DI should be way under 5ppm (most are around "0" for DI).
BTW, who made the TDS meter, and does it come with instruction on calibration and usage?
ndimuzio":1r2mxjbs said:Its made by Kent Marine, the TDS comes with the unit I bought. I dont know what im doing wrong but by the time I ran the system for 2 hours.. the TDS reading on the filtered water was WAY up higher then it was when I started.