Conductivity measurements must be temperature compensated at a standard reference temperature of what?

• A. Room temp
• B. 25 C
• C. 0 C
• D. 100 C

Answer: (B)

Temperature affects how easily ions move in solution, so conductivity readings drift with temperature. To compare results reliably, instruments apply temperature compensation to a fixed reference temperature. That standard reference is 25 C, chosen because it provides a consistent baseline used across many methods and instruments in labs, roughly aligning with typical controlled lab conditions. Using 25 C lets measurements from different times and places be meaningfully compared. Using room temperature isn’t ideal since it varies; 0 C or 100 C would involve phase changes of water and aren’t practical reference points.