The ACA Penetrator is a line of sirens that were produced from the early 80's to the latest release, the 2007 ASC T-135. There is a wide variety of these sirens:
ACA P-10
Lasted from 1982-1994. 8/12 Port ratio.ACA P-15
Essentially a P-10 with a port ratio of 9/12.ACA PN-20
Produced from 1992-1994. Continued as RM-135.ACA P-50
Loudest dual-tone siren in the world. Second loudest siren in the world. Produced from 1982-1994, continued as the RM-135/T-135 until 2007.ASC T-135 (2007)
ACA P-50 in a new shell, more like that of a ASC-T-128. Slightly quieter, however is the loudest siren in production AS OF April 2024.ASC RM-127
Renewal of the P-15. Lasted from 1994-2002.ASC RM-130
Renewal of the PN-20. Lasted from 1994-2002.RM-135
Renewal of the ACA P-50. Lasted from 1994-2007.Werden Electric P-127
Renewal of the P-15. Released around 2004, unable to find production halt date.
ACA P-50
ACA P-10/P-15
Werden Siren
ASC T-135 (2007)