Yeah I've heard good things about the oaktons but maybe yours is one that can swing both ways. Mine is ULTRA basic(what a great name ) ....not a bell or whistle to be found.

Mine is actually a back up tds meter....I use a BlueLab e/c meter and it not only reads e/c but a 0.7 AND 0.5 conversion all at the same time. Otherwise I would constantly forget which one I use......so yes, I'm sure of the conversion there.

Do you see defs in flower? What kind of issues are you seeing?
Weedhound Reviewed by Weedhound on . TDS Meter Calibration Issues I'm hoping that there are some really smart folks out there that can help me understand something of the world of meter calibration. After making my purchase of an Oakton TDSTestr11, I asked the young genius behind the counter for an appropriate calibration solution, for which he hands me General Hydroponics Standard Calibration Solution. Here's where the confusion starts, as the package indicates that it calibrates to 1500ppm (NaCl), 2190ppm (442), and 2930S (microSiemens). So everything Rating: 5