DaveC wrote:
I've got several remote alarm sensors triggered by 120vac relays. When power
fails, the alarm calls the right folks.

Problem is that even the small power glitches get these guys out of bed. Not
a good thing.

How can I delay the de-energizing of these relays? 5 minutes without power is
OK. Will a series diode and shunt cap do the trick? If so, what size cap? If
not, what're my options?

The relay is similar to this one:

http://tinyurl.com/6pppw

Thanks,

Someone suggested hydraulic. I was thinking pneumatic.
Checkout:
http://ecatalog.squared.com/catalog/.../17321027.html

Not cheap but do have a 5 min +/- 12% version.