In a message dated 08/04/03, Mike@........................ writes:

> I am designing intrusion sensors to detect people entering the country 
> illegally in southern AZ. I am the technical director of the American 
> Border Patrol.  

Hi there Michael,

       There are several low noise, low power opamps available. To be of more 
help we need to know what sensors and impedance you are using and what power 
supplies are available. You may also have to consider filters and 
communication systems. There are usually several used Military systems on 
Ebay, geophones + radios.

       Regards, 

       Chris Chapman 

In a message dated 08/04/=
03, Mike@........................ writes:



I am designing intrusion se=
nsors to detect people entering the country illegally in southern AZ. I am t=
he technical director of the American Border Patrol.  



Hi there Michael,



       There are several low noise, low po=
wer opamps available. To be of more help we need to know what sensors and im=
pedance you are using and what power supplies are available. You may also ha=
ve to consider filters and communication systems. There are usually several=20=
used Military systems on Ebay, geophones + radios.



       Regards,=20



       Chris Chapman=20