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AX TFR can provide target recognition in areas
A ONLY Activated = CLOSED CIRCUIT = No Alarm (Not interesting)
B ONLY Activated = OPEN CIRCUIT = ALARM (Possible threat)
A+B Both Activated = CLOSED CIRCUIT = Truck (Not interesting)
A = NO
B = NC
These configurations could be reversed to detect larger targets
and ignore others
No need for any power infrastructure means that installation is
completed in hours rather than days. This is critical for some
public transport and public service sectors
where activity is expected
but needs to be ignored
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