Cable To Alarm When Cut?

What cable could I use to wrap through about 100 tractors and mowers? I would like to trigger the alarm system when the cable is cut. Or what other methods would work to set off the alarm if equipment is stolen?

I don't think analytics would work because the equipment will moved around to often.

Login to read this IPVM discussion.
Why do I need to log in?
IPVM conducts unique testing and research funded by member's payments enabling us to offer the most independent, accurate and in-depth information.

** *****

**** *** ************ *** ****** ** * **** **** ****** ?

***** *** ***************** ******.

****'* **** *'* ******* ***! ******.