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.
Penetrator-10
This model was the first to appear, slightly after the Allertor 125. It uses the same 10 HP motor to drive the 9/12 port stator. This model can sometimes be differed from its look-alike twin, the P-15, by its intake cone. However it depends, because the dual tone P-15 shares the same intake cone as the P-10 does. The P-10 does not use the cylindric intake found on single tone P-15s. That is limited to the P-15 only.
Penetrator-15
This siren was nearly identical to its older brother, but is instead powered by a 15 HP motor. Some models have been equipped with dampers in the tube to create coded signals.
Penetrator-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
