From the movie:
And now in real life:
It's a Beckman Industrial HD 110T, this model has a thermo couple tester on the front and the label between the screen and knob is a little wordy, but is dead on in all the other ways. Made by Wavetek here in San Diego.
My electronics teacher in high school had one back in the day and I was realy impressed up till that point I had only used analog type meters and here comes a new version WOW!
This thing is big 4" X 7" X 1 7/8"