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Re: diy microwave alarm

Subject: Re: diy microwave alarm
From: joe hey <joehey@xxxxxxxxxxxxxx>
Date: 03 May 2014 04:06:00 GMT
Newsgroups: alt.security.alarms
References: <53604b38$0$44925$862e30e2@xxxxxxxxxxx> <3l65m99vsfb6c9jon97auipl0li7c2t8ks@xxxxxxxxxxxxxxxxx> <5362dc24$0$44953$862e30e2@xxxxxxxxxxx> <2er7m95os2pdk30gvrbjqbetu5oga8kff1@xxxxxxxxxxxxxxxxx>

On Fri, 02 May 2014 14:11:30 -0500, G. Morgan wrote:

> joe hey Wrote:
>
>>(What is a 'PE beam'?)
>
> Photo-electric

PE beams would be fine if they could span about 200 m in heavy rain.

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