Water hammer

[anihita]

More information can be found in google and following link:

[link Point to another website Only the registered members can access]

[carl_e]

Or you just buy and install (two for differential) dampener/pressure limiting valves that protect the instrument and be done with it.
They are designed for impulse tubed instrumentation.

h*t*t*p*://www.midwestinstrument.com/limiting/limiting_main.asp