Clear guages

Matthew Davis submitted

I would like to see a video that shows the internal working of your mechanical guages. I teach the class where the student first start using their yellowjacket (R12, R22, & R502) guages. If I had a video in lecture and they had their guages in hand, I could go through opening and closing manifold valves and at the same time they could see the position of the valve(s) in the manifold off the video. I think this would help them understand the guages themself.