Re: Contact sensors?

["Rob Iles" <rob.iles@xxxxxxxxx>]

Reed switch + rare earth magnets? I've got a couple salvaged from an
old
HDD, and trust me - they're very strong! - can easily imagine them closing
a
reed switch at 50-70 mm!

Apologies in advance if I've missed the point!

R.


2008/11/19 Paul Gale <groups2@xxxxxxx>

>   Hi pete,
>
> Thanks but unfortunately the loft was finished some time ago, so no
> chance of moving the cable. Not sure how successful it'd be at the top
> though anyway - may not be particularly sensitive? I know the holes
> and fixings you're talking about.
>
> Any other ideas anyone?
>
> Paul. (Mobile)
>
>
> On 19 Nov 2008, at 14:45, "Pete Church"
<yahoo@xxxxxxx<yahoo%40petechurch.co.uk>>
> wrote:
>
> > Paul,
> >
> >
> >
> > If you haven't completely enclosed the Velux yet I would suggest
> > putting a
> > sensor at the top of the window in the cavity above/behind the
> > handle where
> > the motor sits (on an old style non Integra one). There is also a
> > grommet/hole to pass the cable through the frame into that
cavity.
> > Because
> > of the way the mechanism works for cleaning there is still
clearance
> > at the
> > top of the window even with the window fully rotated.
> >
> >
> >
> > HTH
> >
> >
> >
> > Pete
> >
> >
> >
> > I have 3 large top opening velux windows in my loft and I ran
alarm
> > cable to the bottom of each. I want to fit a suitable sensor to
detect
> > when the window is open. Trouble is, the way that the window
opens for
> > cleaning (whole window swivels 180deg from the center-ish of the
> > window) means that there's no clearance for positioning a
standard
> > magnetic contact sensor between frame and window.
> >
> > What I really need is a contact sensor that can operate around
50-70mm
> > ish between the magnet and reed switch. I've not seen anything
like
> > this with that kind of operating gap.
> >
> > Anyone got any ideas or know of suitable sensors ?
> >
> > I guess there may be other sensor types that may be suitable
although
> > of has to be fairly discreet (some kind of adjustable proximity
> > sensor). Adjustable operating distance would be really good as
that
> > would allow fine-tuning.
> >
> > Thanks,
> >
> > Paul.
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
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--
Rob Iles

RMIDevelopment

Web: http://www.rob-iles.co.uk/rmidevelopment
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Skype: rob_iles
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