Well, what I wrote was partly humor, partly serious:
"I would like to thank: Prof. [my adviser] for his advice and support
throughout the thesis work, Prof.  for his patience as I
mis-implemented his design,  for his assistance in selecting
components, the [lab and department] for computer time, , whose
Masters thesis provided the format I have adopted, the manufacturers
of [caffeinated beverages] for their stimulating ideas, E. Gary Gygax
for giving me something to kill, and the States of Alaska and
I think you're overthinking this. Any polite statement crediting those who have made a significant contribution to the project will be fine.
Suggestion: see if your school maintains copies of past theses in their library, read through a few to see what other people have done, and adopt what seems useful from those.