IPA: /ˈtaɪtrətər/
KK: /ˈtaɪtrətər/
A device or person that performs titration, which is a process used in chemistry to determine the concentration of a substance in a solution.
The chemist used a titrator to measure the acidity of the solution accurately.
Titrator is formed from "titrare" (meaning to measure) and the suffix "-or" (meaning one who). A titrator is one who measures, specifically in the context of a chemical process.
Think of someone who 'measures' ('titrare') substances in a lab — that's what a titrator does.