What parameters should I buy for ph meter

[RibbedFlank]

"What is a Multiparameter Meter?

A analytical instrument that can measure multiple parameters, such as pH, EC, TDS, DO and Temperature with one device."

http://www.hannainst.com/Usa/subcat.cfm?id=005

I need a ph meter for spice extraction, but when I searched for one I found these other purposes that I am not aware of what I'd use them for in alkaloid extractions?

 

[benzyme]

yep