Hand held TDS meter options

[Myka]

Originally Posted by Binare

You hold the button till it reads zero, then put it in your water. Not entirely sure why calibration is necessary on some these. Out of liquid it should always read 0. The walmart one works good enough for our needs, filter replacement.

Mine has read 15 ppm off when I have calibrated it. It always says 0 out of liquid. I want to change my filters when I get 1 ppm tds, not 15 ppm! Mostly I'm just sick of my particular TDS meter, and I'm looking for something different, but no I don't want to spend $80 on a tds meter! Just looking at other options.