Penetrator
The Penetrator series is a series of rotating sirens by Alerting Communicators of America that mainly consisted of 4 models: The P-10, P-15, PN-20, and the P-50.
Penatrator-10
This model was the first to appear, slightly after the Allertor 125. It uses the same 10 HP motor to drive either a 9/12 port or the rare 8 port stators. This model can be differed from its look-alike twin, the P-15, by its conical intake tube.
Penatrator-15
This siren was nearly identical to its younger brother, but is instead powered by a 15 HP motor. Unlike the P-10, the intake tube is cylindrical, and some models have been equipped with dampers in the tube to create coded signals.
Penatrator-20
This type began as the problematic Performance+ Penatrator, made especially for Dane County, Wisconsin. The siren was intended to be 100% DC, but was never perfected, and thus the project was scrapped. The Penatrator-20 uses the 9 port rotor from the Screamer S5, and was attached
