Alien Detector

[Hyenna]

An Alien detector that gives a network signal when aliens are near.
It could be useful to switch on laser turrests in the section of defense or switching off factories when the attacks getting too frequent (as if the pollution gets up too much there is more alien attacks).
Also could be useful to give a red traffic signal to trains when aliens are detected near a railway between save areas where they can wait.
Or simply give an alert on the speakers when aliens are near.

[Tekky]

Related threads:
viewtopic.php?f=6&t=60736 Entity Sensors i.e. detecting bugs before an attack
viewtopic.php?f=6&t=40784 Pressure Plate (and other Dwarf Fortress things)
viewtopic.php?f=6&t=41805 Sensors and such.
viewtopic.php?f=6&t=8011 [Electronics] - Sensors
viewtopic.php?f=6&t=13127 Wire sensors
viewtopic.php?f=6&t=43771 Motion sensor
viewtopic.php?f=6&t=45956 Player detection for circuit network

[Koub]

If I may add, there are some suggestions to just allow radars to output what they're sensing in the circuit networks :
viewtopic.php?f=6&t=19637