Even though they are highly technical and chock full of juicy data for the most spec-ravenous engineer, these ads for Agilent instruments still manage to use humor to get across the main benefit--albeit engineer humor.

The following ads is actual, unmanipulated photos of something that is supposed to be impossible, but Agilent made it. When demonstrated at a tech show it was a big hit.
And these are example of using visual puns in the photos of the actual products, something that engineers found amusing.