Quorum A-160 & A-180
Steffen Stello
Does anybody know these two private home alarm systems, the Quorum A-160
and A-180.
How does the volumetric shock wave sensing work in respect of false alarms.
What are your experiences with the products.
Regards
Steffen Stello
Ron Rempel
Hi Steffen
This technology used by quorum has been around since the second world
war, it has lately been ressourected and dumped on an unsuspecting
public.
These systems are very sensitive to any enviromental fluxuations and can
not be relied upon to provide any kind of serious security.
They also tend to be priced higher than mose wireless or hard wire
systems.
My advice, stay as far away from them as you can.
Regards, Ron
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Robert Dolph
Steffen Stello wrote:
>
> Does anybody know these two private home alarm systems, the Quorum A-160
> and A-180.
> How does the volumetric shock wave sensing work in respect of false alarms.
> What are your experiences with the products.
>
> Regards
> Steffen Stello
shock waves are created when a door or window is open. It can cause
alot of false alarms since other types of movements can also create
infrasonic waves.
Bob
MSIAlarms
Dear Steffen:
The Quorum technology is based on the "infrasonic" wave that is below the
threshold of human hearing. When you open a door, the air displacement
literally causes the air in the room, and to some degree the whole house,
to shake - something like the proverbial bowl of jelly. Infrasonic
sensors are designed to detect this low frequency wave.
We had a plug-in, wall mounted infrasonic detector that we tried out as
an annunciator for small storefront businesses some time ago. Store owners
are always worried about someone entering their premises when they are in
back and they are either embarrassed to find a customer who has been
waiting for them or ripped off by someone who creeps into the store and
grabs stuff when the owner is not up front. Supposedly, these would work
whether the front or back door was opened.
We stopped using them because if a door was opened slowly enought, it
wouldn't trip the infrasonic bing-bong. On the other hand, they also
became a nuisance because they would bing-bong on infrasonic events coming
through ducts and false ceiling coupled into the premises from neighboring
stores. In short, the technology was marginal at best, even though it
appeared to work and could be adjusted to do so "quite a bit" of the time.
I was amazed to see such devices being advertised as whole-house security
systems, because there was enough holes in the application of this
technology to drive a truck through.
The premise was that all you had to do was drop this thing in your house,
turn it on, and it would catch any intruder regardless of the entry mode.
I guess if you didn't hook one of these turkeys to a dialer so it sent the
police, all you had was a rather unreliable nuisance that might spuriously
alarm several times a day.or not at all, as the case may be. It was sold,
and at a very good price by a lot of MLM people who bought into the idea.
I'm not against MLM but when you base the entire concept of a security
system on a technology that fails to detect some entries (such as a very
carefully opened sliding glass door or window) or is prone to frequent
false triggering on god knows what, then you are really selling people a
bill of goods, and a potentially harmful one at that.
We have coined a term for systems like these and some of the other junk
you find in home centers that are represented as alarm systems. We call
them "Closet Systems" because when we go into a home to install a real
security system we sometimes find the one that the homeowner tried but
didn't work in the hall closet, right up there on the top shelf, in its
original box. Needless to say we do not bring up the subject of the box on
the top shelf to the customer.
My advise would be not to invest your time or money in any security system
that bases its protection for you on the infrasonic concept.
Hope this helps
W. Allan Edwards
Monitor Systems, Inc.
Great Falls, VA
