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Re: What kind of sensor did I see today?

Subject: Re: What kind of sensor did I see today?
From: "Group-Moderator" <Group-Moderator@xxxxxxxxxxx>
Date: Wed, 7 Jun 2006 23:45:51 -0400
Newsgroups: alt.security.alarms
References: <1149699850.541802.268150@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> <234d278f1578902742132633b419ea47@xxxxxxxxx>

"Nomen Nescio" <nobody@xxxxxxxxx> wrote in message
news:234d278f1578902742132633b419ea47@xxxxxxxxxxxx
 But I do remember the old beams with light bulbs
> inside, complete with a spinning metal disk with holes in it to "modulate"
> the beam.
>
> - badenov
>

To forgot to mention the oil bath motors that spun that metal disk :)

References:
- Re: What kind of sensor did I see today?
  - From: Jim
- Re: What kind of sensor did I see today?
  - From: Nomen Nescio

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