possible sample grabber used too get samples at different levels of the tank,
we used these but this one if one would be a earlier version- my 2¢ .. ... cool

there would need too be more too it like a weight on the bottom, being glass
if complete - a float for a possible alarm (instrumentation) in a refinery.
what does it say on the glass of this piece?

Last edited by advertologist; Sat Feb 03 2018 01:16 PM. Reason: ad

RANDY