Re: Ultrasonic Sensors

["Holger" <hes@xxxxxxxxxxxxxxxxxx>]

Come back to planet earth.

Ultrasonic technology was used in the '80s with limited success. We are all
using Passive infra-red, microwave, or a combination of both.

You need to contact a local dealer and see what is available in your area.

http://www.alarmland.com


"rgondzur" <rgondzur@xxxxxxxxx> wrote in message
news:1147497943.005698.240520@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> My need is to monitor the perimeter of an outdoor area.
> I am considering ultrasonic sensors to act as an intrusion monitor.
> They need to be mounted near ground level.
>
> I need a device similar to what I see on upper-priced automobiles that
> indicate the presence of items around its perimeter.
> I have seen a very nice system mounted on the bumper of a BMW that
> works extremely well to indicate a person walking around the vehicle.
>
> The sensor must be designed for outdoor/external applications.
>
> There will be a series of sensors with patterns that overlap to provide
> detection around the entire perimeter.
> They will all be wired to a controller that will sound an alarm when
> the perimeter has been entered.
>
> Perimeter size can vary from one hundred to several hundred feet.
>
> Since they will be used outdoors, what will the issues be?
>
> Therefore, I am looking for low-power, reliable sensors and the
> suggested controller to manage the system.
>
> Of course, price will be a determinig factor.
>