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Subject: Re: Coming soon to a theatre near you - endless mischief potential
X-Newsreader: Microsoft Outlook Express 5.00.2919.6700
Date: Sun, 13 Oct 2002 00:51:27 GMT
NNTP-Posting-Date: Sun, 13 Oct 2002 00:51:27 GMT
Organization: AT&T Worldnet
You can read below about heart-detectors (instead of smoke-detectors) using
Infrared Beams in enclosed spaces (!)
Subject: Re: what type of sensors do fire alarm usually have - smoke or
Organization: None. At all.
Date: Thu, 03 Oct 2002 22:48:36 GMT
In article ,
> "beatnik" wrote in message
> > All fire alarms have "trouble" detection...
> I've seen some older systems which do not have trouble detection. Some
> monitor the wiring. I have seen smoke detectors which would not work, yet
> there was no trouble indication. (That was on a an old local only alarm.)
> That is why we were required to periodically test fire alarm systems.
> >...A tamper switch is a "supervisory" condition, not a trouble.
> Well when I worked at the alarm company, if someone turned off a water
> valve, we received a trouble alarm. As a matter of fact, we could only
> receive a fire alarm or a trouble alarm. I know the building owners with
> these systems are not keen on spending money, so I'm sure many of these
> systems are still in operation.
Smoke alarms are cheaper (at least in this part of the world) so you are
going to get somke detectors - even when a smoke detector will only go
off fwhen the building is burning down. Generally electrical apparatus
wants heart detectors. (Or so our Fire specialist informed me.) We use
the infrared beam type a lot in MCC rooms and relay rooms now.
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