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.
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.