What brand and model is the smoke detector? You may be able to go to the
company website and find a different detector of the same brand that is
compatible with your system, but which has a silence button feature on it.
Then just buy the replacement and switch it out with the one you have now.

Paul Oman wrote:
I have a hardwired smoke detector that came with my house. When doing
some home projects (and some cooking) the detector goes off and there
doesn't seem to be any way to turn it off. It just buzzes until the
air slowly clears. My other detectors are battery operated and I just
remove the battery.. Any suggestions on the wired detector short of
turning off the power? I am thinking about turning off the power,
cutting the wire and replacing unit with a battery model. Any
alternative suggestions? Maybe installing an on-off switch (attach to
which colored wire?) on the power line leading to the unit? ---------
paul