Re: diy microwave alarm

[joe hey <joehey@xxxxxxxxxxxxxx>]

On Wed, 30 Apr 2014 08:56:07 -0700, Jim wrote:
<snip>

> and on site guard response.

Now that's exactly what I'm talking about.

> Photo electric eyes seem to have a better record but for it to be less
> false alarm prone and require less attention,  it can get expensive. The
> use of multiple beams and a lot of tinkering and adjustment is required
> to be able to filter out the many false signal events ..... which, of
> course makes it more prone to being defeated by someone entering with a
> purpose. The better units have fog, snow and other compensation
> circuitry to help reduce false alarms. Look at Optex line of products.

How about heavy rain...

thanks


>> > Also, when fooling around with microwave emitters ..... "you can put
>>
>> > your eye out".
>>
>>
>>
>> Yes.
>>
>>
>>
>> Thank you for your thoughts,
>>
>>
>>
>> joe