After watching Tom stare at her for a minute, Penny got up a bit and said:
"Since this is supposed to be a bit technical, can you give me a demonstration of how the hardness meter works?"
Tom didn't want to show her, but he could resist her eager smiling attitude, especially as she was dressed all in black. So he explained where the cameras were in the room, and where the displays were that she could read.
"But," Penny teased, "as you may remember from our meeting this morning, I'm very interested in how valid these readings are..."