PIR Defeat, What To Use?

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Watched how to defeat a PIR device on television last night.  Way too
easy.  What do you guys recommend to replace it with?


Re: PIR Defeat, What To Use?
By wrapping yourself in 25 rolls of tin foil? ;)

Jen...tel wrote:
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Re: PIR Defeat, What To Use?

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You're not going to defeat a PIR that I'VE set up... if you've gotten past
my perimeter security.... and if you've gotten past the various interior
"traps" that I've set...

<G>



Re: PIR Defeat, What To Use?
poleclimber@qwest.net says...
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Note that they only defeated a simple PIR, not a Microwave PIR :) Also
they moved very fast accross the room, I think the same creep method
that they used on the sonic detector could have worked too, certainley
one of my old ones i used to be able to sneak up on it without setting
it off...
--
  Alex Threlfall
Cyberprog New Media
 www.cyberprog.net
tel - 0870 446 0789
fax - 0870 446 1789

Re: PIR Defeat, What To Use?

Alex Threlfall wrote:
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Ah, good point didn't realize that.  But can we really get installed
only microwave units? I thought, they were both IR and MW.  If that's
so, don't you still need the IR to activate along with the MW to get an
alarm? If they defeated the IR by preventing it from seeing the IR
given off by a person, even if the MW actvated, wouldn't it still not
go into alarm because there will never be an IR detection?   I'm not in
the alarm business so I may be way off base and confusing myself.
Thanks.


Re: PIR Defeat, What To Use?

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Combination Microwave/PIR motion sensors, known as "Dual-Tech" motion
sensors, are set so that each technology is more sensitive, but requiring
both to trip to activ ate the relay.

BTW- if they "defeated" a PIR by moving through a room very quickly, the PIR
wasn't set up properly to begin with. Proper placement, aiming angle, and
sensitivity adjustment are all vital elements of good catch performance,
while reducing the possibility of false alarms.

A good alarm system consists of "layers" of protection, and not just a
single motion sensor for the interior protection.



Re: PIR Defeat, What To Use?

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This is the segment referred to and dates...

http://dsc.discovery.com/tvlistings/episode.jsp?episode=57&cpi=25032&gid=0&channel=DSC

BTW...watch to see what happens when they walk through holding up a large white
sheet.....



Re: PIR Defeat, What To Use?

Stanley Barthfarkle wrote:
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Naw, they mentioned reading that IRs can't see through glass.  They
took a small piece of glass fashioned a wire frame and hung it a few
inches from the IR lens so it didn't trip when someone walked through
the room.  I'll tell you, it was cool on how they rigged the pole and
wire hanger and didn't trip the motion when they dangled and placed the
glass.

Now that I think about it, didn't one of those military shows
demonstrated how they use colored smoke to prevent battlefield infared
detectors from seeing body heat,?

So much so quick on defeating IR's........

Hey, I got it! the producers of those shows own stock in a competing
type of detector!


Re: PIR Defeat, What To Use?
When installing a system in a High-Risk building, Motion Detectors with
Anti-Mask is a must........ If the detector in the video had the anti-mask
feature, their little glass trick wouldn't have worked...

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Re: PIR Defeat, What To Use?
How are they going to get 20 feet down my hallway to put a piece of
glass over the detector.  What was the point of this show?  To show
burglars how to break into houses. Only in America.  Just like the true
crime and CSI shows that show how to commit a heinous crime and get
away with it.

Or perhaps the show was truly attempting to educate the public on the
weaknesses of thier present technology.  Did they offer a superior
product that can't be so
"easily" defeated.  What was it?

I doubt that any burglar is going to take the chance that he can run
across the room and defeat a motion detector. If the house is alarmed
at all, 99.9% of the burglars won't go near it. The other 0.1% will run
away after tripping the audible alarm.  There are enough good targets
out there without alarms to worry about the ones that do.

IMHO
JollyRoger


Re: PIR Defeat, What To Use?
Thats what you get for watching stuff on TV

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Re: PIR Defeat, What To Use?
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Whaddayamean?? Last week on CSI I saw them get DNA off a lougie stain on
some guy's turban after it was recovred from an alligator's belly in
Florida.
js



Re: PIR Defeat, What To Use?

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See the problem here is you watch CSI, I always go for the Law and Order
trilogy myself, much more realistic



Re: PIR Defeat, What To Use?
is you watch CSI, I always go for the Law and Order
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Sure, I love the way they do business.
"You're under arrest. No, wait...You're under arrest, um, no, just a minute,
OK, YOU'RE under arrest.
js



Re: PIR Defeat, What To Use?

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minute,

All that matters is they get it right in the end



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