Re: International Electronics Glass Break Detector?

["Bob La Londe" <usenet@xxxxxxxxxxxxxxxxx>]

"Crash Gordon" <webmaster@xxxxxxxxxxxxxxxxxxxxx> wrote in message
news:LuMTe.108$OD.8232@xxxxxxxxxxxxxxxxxx
>I have 10 of them in my house.
>
> You can't calibrate them other than setting them for the type of glass you
> have in that room, which should already be done.
>
> To properly test them you need to buy a glassbreak tester for IEI
> products. That being said most gb testers are only an approximation of
> what is needed to set the detector off.
>
> I have hundreds of IEI's out there an have had very few total failures,
> very few false alarms, and have never had one fail to go off when broken
> glass was within their range of detection.
>
> Some guys don't like them...not sure why. But, they are more expensive
> than most gbs out there too.
>
> hth..
>

I had IEI  555s and 557s (I think) in lots of places.  They work well, but I
have had falses in any semi closed smaller spaces with loud noises.  They
didn't discriminate as well as I would have liked.