"DKL" doesn't have a standard meaning when it comes to measuring liquids. It's possible that it's an abbreviation specific to a particular industry, company, or context.

To help me understand what you're looking for, could you provide more information? For example:

* Where did you see this abbreviation? (e.g., a lab report, a textbook, a product label)

* What is the context? (e.g., what type of liquids are being measured?)

With more details, I might be able to decipher what "DKL" stands for.