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It's part of an lightning alarm. But what part?
The part that makes noise? :)
[thorguard.com...]
The THOR GUARD lightning warning system is comprised of two essential elements. The first, the "Hyperstatic Sensor" assembly, constantly monitors the electrostatic field from its typical location on the top of a structure.
I think we can let treebirds answer count, since "part that senses" was the correct answer if you agree LisaB.
Or call it a tie?
[edited by: jecasc at 8:56 pm (utc) on May 17, 2006]