Motion Detectors and Ceiling Fans

[Gary M. Tencer]

I was wondering if anyone has had any experience with arranging, aiming, or
desensitizing motion detectors so they are not triggered by operating ceiling
fans. I know there are "adaptive" sensors that are able to discriminate pets,
etc. from the bad guys, but will these allow the concurrent use of a ceiling
fan, with multiple combinations of speed/direction, without alarming?

Thanks

Gary

Replies: Please note that address is altered to prevent spam.

[Robert L Bass]

This is a multi-part message in MIME format.
--------------F1B6CBBDB53E13F3752273C1
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

Yes, Gary. I have done this successfully on numerous occasions. Simply
place the PIR at or below the hight of the blades of the fan. Unless
the PIR has a "curtain" lens, it will not see the fan. The air
circulating about the room in front of the detector should not cause
problems -- UNLESS it happens to blow some object around in view of the
PIR.

Also, it is a good idea to avoid creating a direct draft on the surface
of the detector. Thie can lead to false alarms due to direct cooling of
the pyrolytic transducer (heat sensor).

Good Luck,

==========================>
Robert L Bass >
Bass Home Electronics >
80 Bentwood Road >
W Hartford, CT 06107 >
>
alar...@BassHome.com >
http://www.BassHome.com >
>
860-561-9542 Voice >
860-521-2143 Fax >
==========================>

--
--------------F1B6CBBDB53E13F3752273C1
Content-Type: text/x-vcard; charset=us-ascii; name="vcard.vcf"
Content-Transfer-Encoding: 7bit
Content-Description: Card for Bass, Robert
Content-Disposition: attachment; filename="vcard.vcf"

begin: vcard
fn: Robert Bass
n: Bass;Robert
org: Bass Home Electronics
adr: 80 Bentwood Rd;;;W Hartford;CT;06107;USA
email;internet: alar...@BassHome.com
title: President
tel;work: 860-561-9542
tel;fax: 860-521-2143
x-mozilla-cpt: ;0
x-mozilla-html: TRUE
version: 2.1
end: vcard

--------------F1B6CBBDB53E13F3752273C1--

[Daniel Born]

Gary M. Tencer wrote:
>
> I was wondering if anyone has had any experience with arranging, aiming, or
> desensitizing motion detectors so they are not triggered by operating ceiling
> fans. I know there are "adaptive" sensors that are able to discriminate pets,
> etc. from the bad guys, but will these allow the concurrent use of a ceiling
> fan, with multiple combinations of speed/direction, without alarming?
>

I don't have any particular real live experience with this but, unless
your fan blades are warmer than the environment around them, your
infrared detectors won't pick up anything... Now if you had
microwave-only detectors, that might be different.

Regards,
Daniel

[John Galbreath Jr.]

Gary M. Tencer wrote:
>
> I was wondering if anyone has had any experience with arranging, aiming, or
> desensitizing motion detectors so they are not triggered by operating ceiling
> fans. I know there are "adaptive" sensors that are able to discriminate pets,
> etc. from the bad guys, but will these allow the concurrent use of a ceiling
> fan, with multiple combinations of speed/direction, without alarming?
>

> Thanks
>
> Gary
>
> Replies: Please note that address is altered to prevent spam.

I have found that my ceiling fan (within 7 feet of motion sensor) will
not set it off EXCEPT when turning ot on or off. It must have to do
with changing speeds. A fun fact: We have trouble with gas logs being
left on. Gas logs will trip a motion sensor.
--
John Galbreath Jr.
ABSCO Fireplace & Patio
http://www.ABSCOFireplace.com
mailto:Jo...@ABSCOFireplace.com

[Bertel Schmitt]

_Microwave_ (aka RAAR) motions can be set off by moving objects, even by curtains.
Infrared motions react to objects of different temperature. I can drive a (just
started...) car
by an I/R motion detector and it won't say anything, if I walk by, off it goes.

BS