Re: PIR Options

["psghome2002" <psghome@xxxxxxx>]

Kissing a PIR is a test you'd certainly want to do when there's no 
one around!

--- In ukha_d@y..., "Frank Mc Alinden" <armagh@b...>
wrote:
> Actually Paul my thoughts were maybe it has daul contacts ,one for
ha
> control and one for alarm control . Summer time is a good test for
a  pir .
> Go into a room when the ambient temp is around 30 or more degrees 
C most
> cheap ones you can walk up and just about kiss them before they 
will detect
> you . I  think the dual tech sensor would be more sluggish as it
would
> require both pir + microwave to trip before alarming .
> 
> Frank Mc
> ----- Original Message -----
> From: "psghome2002" <psghome@h...>
> To: <ukha_d@y...>
> Sent: Thursday, July 18, 2002 9:00 PM
> Subject: Re: [ukha_d]PIR Options
> 
> 
> > The new PIR sounds interesting - I would imagine it's being 
designed
> > to address the 'occupancy sensing' issue???
> >
> > --- In ukha_d@y..., "Frank Mc Alinden"
<armagh@b...> wrote:
> > > Hi All
> >
>             
I have used many different pir sensors over the 
years
> > as  i
> > > worked  on and off in the security industry . My
personal first
> > choice is
> > > Pulnix sensors and secondly and also IMO a great detector is
the
> > Alarmcon
> > > 210 sensor and 220 these are now outdated i think the new
ones 
are
> > called
> > > 310 + 320 etc but  i used lots of them in large
commercial 
stores
> > here in
> > > Melbourne . Also i was speaking via email to the President
of
> > Pulnix America
> > > ( a Scot) and he said that they were developing a pir for
the 
HA
> > market he
> > > wouldnt elaborate but will let me know when its ready. If
your
> > interested i
> > > have a couple of pics on my site  and a link to pulnix
sensors. I
> > also
> > > purchase my cctv stuff from them.
www.users.bigpond.com/armagh/
> > >
> > > Frank Mc
> > > ----- Original Message -----
> > > From: "psghome2002" <psghome@h...>
> > > To: <ukha_d@y...>
> > > Sent: Thursday, July 18, 2002 7:22 PM
> > > Subject: Re: [ukha_d]PIR Options
> > >
> > >
> > > > I trialled a few different PIR's for the same use
(there's 
been a
> > > > lot of discussion about this on here before). I
wanted
> > the 'perfect
> > > > PIR' that had to meet the following criteria:
> > > >
> > > > 1) Quick triggering
> > > > 2) Stable so as not to give false alarms when used as
security
> > PIR
> > > > 3) Looks good
> > > > 4) Ability to turn On/Off LED
> > > > 5) Interchangeable Lens for wide/curtain mode
detection.
> > > >
> > > > Point 1 is normally part dealt with by user selectable
'pulse
> > count'
> > > > i.e. how many detection pattern 'beams' need to be
broken to
> > trigger
> > > > and the internal logic used by the detector (and how
quick it
> > is).
> > > > Generally it is best to go for a sensor that allows a
pulse
> > count of
> > > > between 1 and 4, although most will start at 2 for
stability 
(low
> > > > false-alarm) reasons.
> > > >
> > > > I must say that I have still not found the ideal sensor
- I 
have
> > a
> > > > combination of:
> > > >
> > > > Alarmcom IR120C - look really good, use great 'black
mirror'
> > > > technology (cutting down susceptibility to sunlight and
other
> > > > unwanted radiation) and are very stable but a little
slow to
> > trigger
> > > > + they are fairly cheap trade.
> > > >
> > > > Pyronix Magnum Ultra - (existing PIR's in my house) -
OKish
> > looking,
> > > > seem quite stable and have selectable 1/2/3 pulse count
making
> > it a
> > > > bit quicker to trigger when on 1.
> > > >
> > > > Optex RX-40QZ - Recommended by Comfort but I've not
tried 
this
> > yet -
> > > > only 2/4 pulse count and detection area doesn't look
very 
dense.
> > > >
> > > > I think the detection area density is also important.
This 
is the
> > > > pattern of 'detection beams' that spread out from the
sensor 
and
> > how
> > > > closely they are spaced. The lower the density, the
further 
you
> > will
> > > > have to move to trigger the sensor (depending on pulse
count).
> > This
> > > > is especially important if you want to detect occupancy
in, 
say,
> > the
> > > > living room where you may sit on a sofa for longish
periods 
of
> > time.
> > > > A high-density pattern and propper alignment of the PIR
will 
help
> > > > here although you cannot guarantee that the sensor will
pick 
up
> > > > small movements.
> > > >
> > > > Someone mentioned a dual tech sensor on here a while
ago.
> > Generally
> > > > these are no good as their trigger time is pretty poor
(long).
> > They
> > > > use a combination of IR detection and microwaves. This
particular
> > > > sensor gave separate outputs for both sensors, allowing
the
> > > > (quicker) microwave technology to be used on it's own.
The
> > microwave
> > > > bit can be difficult as it will apparently sense
through 
walls
> > > > (although I've not tried one) - so siteing is
important. 
Anyone
> > use
> > > > these - I'd love to hear if it's successful.
> > > >
> > > > Paul.
> > > >
> > > > --- In ukha_d@y..., "Amar Nagi"
<amar@a...> wrote:
> > > > >
> > > > > I have homeseer, ocelot and I want to set up
sensors 
around my
> > > > flat to
> > > > > indicate when a room is occupied. What are my
options ? I 
get
> > a bit
> > > > > confused
> > > > > by the range of different sensors (Pir)
> > > > >
> > > > > Any recommend anything ? I don't really want to go
for the 
RF
> > x10
> > > > route
> > > > >
> > > > > Ps sorry I used the wrong subject line b4.
> > > >
> > > >
> > > >
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