I think it is. Was hoping someone was more familiar than me. Different websites talk about charge and others about conductivity, which can be two different things. Tell you what. I know a wastewater plant manager and lab equipment salesman. Let me touch base and see what I find out.
All tds meters are conductivity meters, but according to the article, they may not all use the same conversion factor. There have to be some that still display conductivity.
I checked Amazon. There are several tds meters that also do conductivity for a price of under $20.
Since a scientific model lists for about $1000, you wonder what differences there are between the instruments.