anyone using a HM com-100 TDS meter?

greenthumb21

Active Member
got a stupid question

this thing has 3 different setting ( actually 6, 3PPM and 3 EC) they are KCl,442, and NaCl. The way I understand it they are different calibrations, but cant find a dammmmmmmmm thing out about them.

I have emailed both the nutes maker and meter manufacture but thought someone here might help quicker.

Thanks
 
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