RE: PIR blocker ?

["Paul Gale" <groups@xxxxxxxxxxxxxxxx>]

;) LOL

I have a wet suit in the loft - hang on, let me go get it and try ... ;)

Paul.



> -----Original Message-----
> From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of
> Paul Gordon
> Sent: 12 May 2006 12:42
> To: UKHA_D Group
> Subject: RE: [ukha_d] PIR blocker ?
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> I seem to recall this was a plot device in some film from the 80's -
> "Hackers" was it? - It had Ben Kingsley in it..
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> The character was allegedly able to move around in the room by wearing
a
> neoprene wetsuit and moving very slowly...
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> Paul G.
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> > -----Original Message-----
> > From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx]
> > On Behalf Of Paul Gale
> > Sent: 12 May 2006 12:35
> > To: UKHA_D Group
> > Subject: RE: [ukha_d] PIR blocker ?
> >
> > I've always wondered if someone could put a blanket over
> > themselves (at the same temp as the room) and walk around
> > unnoticed by the PIR!
> >
> > Maybe I'll give it a try when I have nothing else to do ;)
> >
> > Paul.
> >
> >
> >
> > > -----Original Message-----
> > > From: ukha_d@xxxxxxx
> > [mailto:ukha_d@xxxxxxx] On Behalf Of
> > > Paul Gordon
> > > Sent: 12 May 2006 12:31
> > > To: UKHA_D Group
> > > Subject: RE: [ukha_d] PIR blocker ?
> > >
> > > Absolutely impossible, I'd have thought...
> > >
> > > The "P" in "PIR" is for
"Passive"... - these devices do not
> > emit any kind
> > > of signal, - they are detectors only... - they detect
> > infra-red radiation
> > > given off by warm bodies.
> > >
> > > These "jammers" work by flooding the TV's IR
reciever with
> > a very strong
> > > IR signal that swamps it and stops it from being able to
> > discriminate the
> > > specific IR signal that it is looking for from the TV's
remote..
> > >
> > > Therefore, I would suggest, that if you pointed one of
> > these jammers at a
> > > PIR, rather than "blocking" the PIR, it would
actually send
> > it detecting
> > > like mad! - depends quite a bit on the wavelengths if the
> > IR radiation in
> > > question though... Humans emit IR in the 9-10 micrometer
> > wavelength, so
> > > PIR's typically have a detection range around 8-12
> > micrometers... - I
> > > don't know if consumer IR is in this same part of the
spectrum... -
> > > someone else can have a go at answering that...
> > >
> > > Paul G.
> > >
> > >
> > > > -----Original Message-----
> > > > From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx]
> > > > On Behalf Of noughtomate
> > > > Sent: 12 May 2006 11:29
> > > > To: UKHA_D Group
> > > > Subject: [ukha_d] PIR blocker ?
> > > >
> > > > Hi,
> > > >
> > > > Just read about this Infrared blocker.
> > > >
> > > > http://www.remoteshoppe.com/index.php?itemid=3D166
> > > >
> > > > Novelty aside, I'm just concerned that such a device
> > could be use to
> > > > by pass Infrared detectors.
> > > >
> > > > Is the IR technology the same or am I paniced over
nothing ?
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
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