Greg Hiller
New member
Randy,
I own an El'Cheapo TDS meter, which I assume is probably just a very simple conductivity probe. Are most TDS probes just conductivity probes? The meter I have will read down into the single ppm range, but with no decimal places. I typically change my DI cartidge when I get a reading of 1 ppm (as opposed to 0 ppm) from water just as it exits the RO/DI system.
Anyhow, if one were using a typical TDS meter to monitor the output from an RO/DI system, and the meter read 0 ppm. Is there anything that could be coming through the system that would not register on the TDS meter? Some type of non-charged compound that would have very low conductivity?
And, if the answer is yes, is it likely that that compound would come through the DI cartidge (assuming the cartridge is just about spent) before something else that would give a signal on the TDS meter?
I own an El'Cheapo TDS meter, which I assume is probably just a very simple conductivity probe. Are most TDS probes just conductivity probes? The meter I have will read down into the single ppm range, but with no decimal places. I typically change my DI cartidge when I get a reading of 1 ppm (as opposed to 0 ppm) from water just as it exits the RO/DI system.
Anyhow, if one were using a typical TDS meter to monitor the output from an RO/DI system, and the meter read 0 ppm. Is there anything that could be coming through the system that would not register on the TDS meter? Some type of non-charged compound that would have very low conductivity?
And, if the answer is yes, is it likely that that compound would come through the DI cartidge (assuming the cartridge is just about spent) before something else that would give a signal on the TDS meter?