Re: Security: Driveway alarm?

[sales@xxxxxxxxxxxxxxxxxxxxx]

There are several popular brands of magnetometer-based driveway alarms.
Cartel, Mier Products, Safety Technology (STI), Sure Action and Winland
are the best known.  These all work the same way. A coil on the end of
a long cable is buried a few inches beneath the soil next to the
driveway. When a large, ferrous object passes by it disturbs the
magnetic field, generating a minute electrical charge on the A
processor mounted in the house senses the change, triggers a relay
and/or an annunciator.

Magnetometer-based systems are fairly reliable at detecting most
vehicles. They are not subject to false alarms from wildlife or
weather. However, they will not detect a person on foot and they may
miss a bicycle.

Another method to consider is using motion detection. Optex America
makes an inexpensive, wireless motion detector and RF receiver called
"Wireless 1000". This is a simple, outdoor PIR detector and matching
receiver. The advantages of this approach are lower cost, simple
installation and detection of people as well as vehicles. The
disadvantage of PIR based driveway alarms is they can be set off by
animals, blowing shrubs, etc. Careful placement can minimize problems.

I sell these products online at
http://www.bassburglaralarms.com/driveway_monitor_359_ctg.htm in case
you're interested.

Regards,
Robert L Bass
Bass Home Electronics
www.BassBurglarAlarms.com


Les wrote:
>
> What's a good driveway alarm?