[Wayne 962]

Hmm, x-ray machines work by sending the rays through something and then having a receptor on the other side to receive the rays that are not blocked. When you x-ray your hand, the x-rays start at the top of your hand, go through, get blocked by bone, and then the ones not blocked pass through to the sensor (or film) below. In order to get this process to work, you need to have an x-ray generator, and also a receptor on the other side. In the case with the tank, I don't see any spot where one would be able to put a "receptor?"?

Ultra sound works differently by bouncing sound waves off of stuff. That might work.

I just bought a new mini boroscope off of Amazon - it will be here tomorrow. The probe is 4mm in side. Man, the technology behind these is insane. With a coupon, the cost was about $100. Got good reviews too! Teslong NTS300. The probe might be small enough to stick through the hose itself.

More info coming soon...

-Wayne