OgreSeeker
Active member
what is the conversion factor for Hanna 9813 PH/EC/TDS meter?
Set it to EC (mS/cm or millisiemens per centimeter)
"TDS" and "PPM" are nonexistent, bogus lies. NO meter measures "PPM" or "TDS"! They measure EC and tell you the truth or, they measure EC and lie to you! "PPM" is EC x500, or 560, or 640, or 650, or 700, or 720 or 768 or some number too stupid to even remember. If this thing's truly variable, it's the biggest liar out there using any damn number it pleases to fuck your reading.
Plants are illiterate. They don't care that "PPM" is nonsense. Conversation, however becomes difficult when people can't agree on the bullshit factor. In this case, the meter itself can't agree. EC is EC everywhere you go. Stick to mS/cm.
I believe the reason its variable is to alow it to compensate for nutrient solution tempurature.