I have worked in many offices that have indoor service from exterminators come around. Most that I see use a 'direct' spray that applies the chemical into crevices, corners, etc..
if your indoor observation hive is not near these areas, is closed (as I imagine it would be indoors and all) Not sure what affect, if any there would be.
I guess you could also mention to the exterminator to pay particular attention around the OH. most of them are decent people. They don't usually want to kill bees either.
Big Bear