List of sirens built by Alerting Communicators of America

This article lists the outdoor warning sirens built by Biersach & Niedermeyer Co., Alerting Communicators of America and American Signal Corporation.

Biersach & Niedermeyer Co.

Name	Type	Motor HP	Port Ratios	Years of Production	Sound Output and Type	Notes
Mobil Directo (Gas Powered)	Gas-Mechanical	25	8	1942–1952	Rotating 125 dB at 100 ft.	The first version of the Mobil Directo which used a 25HP Wisconsin air-cooled engine.
Mobil Directo	Electro-Mechanical	10	10/12	1952–1964	Rotating 124 dB at 100 ft.	The second version of the Mobil Directo which used a 10HP electric motor.

Alerting Communicators of America sirens

Name	Type	Motor HP	Port Ratios	Years of Production	Sound Output Type	Notes
Allertor 125	Electro-Mechanical	10 (some 15)	8, 8/12, 9/12, 10/12	1967–1984	Rotating 125 dB at 100 ft.	Design changed at least three times throughout production. The most common port ratio is 9/12. The Allertor 125 can produce 2 tones. Alert and Attack (Wail). A third signal was also available, Yelp, which required a special type of motor and used a reversing magnetic starter.
Cyclone 120	Electro-Mechanical	40	8/12	1967–1981	Omni Directional 120 dB at 100 ft.	Produces 120 dB at 100 feet. Produces the 3 following tones: Alert, Attack (Wail) and Pulse (Coded damper needed for pulse signal).
Cyclone 125	Electro-Mechanical	50	8/12	1981–1992	Omni Directional 125 dB at 100 ft.	Produces 125 dB at 100 feet. Produces the following 3 tones: Alert, Attack (Wail) and Pulse (Coded damper needed for pulse signal).
Howler	Electro-Mechanical	10	9/12	1972–1981	Rotating 123 dB at 100 ft.	The Howler is a rotational version of the Screamer S-10 (very rare).
Hurricane 130	Electro-Mechanical (horn and blower)	2 (chopper) 25/30 (blower)	8/10, 10/10, 10/12	1967-1973 (square horn) 1973-1981 (round horn)	Rotating 130 dB at 100 ft.	Started off using a 25HP blower with a square horn, redesigned to 30 HP with round horn. Most common port ratio is 8/10. This siren is similar to Federal Signal's Thunderbolt series.
Screamers	Electro-Mechanical	2, 5, 7.5, 10	8, 9, 9/12	1967–1990	Omni Directional 105–115 dB at 100 ft.	Series of small vertical sirens, comparable to Federal Signal Corporation's Vertical sirens from the 1930s.
Sentry 95	Electro-Mechanical	1	5/6	1967–1970s	Omni Directional 95 dB at 100 ft.	Very uncommon siren. Dual tone circular port siren. 95 dB at 100 ft.
Super Banshee	Electro-Mechanical	25	8/12	1967–1982	Omni Directional 119 dB at 100 ft.	The Super Banshee can produce a Hi-Lo signal with dampers and the other standard tones like Alert and Attack.
Banshee	Electro-Mechanical	10 (Banshee 110), 15 (Banshee 115).	8 and 9/12 and supposedly 10/12 (for the 110).	1967–1973 (Banshee 110) 1973–1994 (Banshee 115)	Omni Directional 110–115 dB at 100 ft.	There are two models of the common Banshees, the Banshee 110 (9/12 only) which can do pulse unlike the 115, and the Banshee 115 which comes in 8 and 9/12 port ratios and only does standard signals (Attack and Alert).
Penetrators	Electro-Mechanical	10, 15, 50	8, 9/12 (P-10 and 15) 8/12 (P-50)	1982–1990 (Later continued as the RM series)	Rotating 124–135 dB at 100 ft.	10 and 15 HP models nearly the same, aside from motor used. The P-50 was and still is the loudest dual tone siren in the world. The P-15 (Single-tone) and P-50 was still being produced by ASC until 2002 and 2007.
Alertronic AL-1000–8000	Electronic	none	none	1983–2007	Omni Directional dB rating depends on how many drivers.	First mass-produced, non-rotating electronic design by ACA.
Alertronic 5000	Electronic	none	none	1983–1984	Rotating 125 dB at 100 ft.	Very short lived siren, replaced by the AL-6000R. Currently no videos known to exist and only a couple of photos of this model of siren.
Alertronic RE-1600	Electronic	none	none	1991–1995	Rotating dB rating depends on how many drivers.	Was made alongside the later years of the AL-6000R.
Alertronic AL-6000R	Electronic	none	none	1984–1995	Rotating dB rating depends on how many drivers.	Replacement for the 5000.
Quadren	Electronic	none	none	1992–1995	Omni Directional dB rating depends on how many drivers.	One of the last electronic sirens made by ACA before their bankruptcy. Design was later bought by ASC, and later became the iForce.
Performance Plus Series	Electro-Mechanical	7.5, 10	8 and 9	1989–1993	Rotating/Omni Directional 115–125 dB at 100 ft.	Rotational versions are the PP-15 and PPN20. There is only one Omni Directional Performance Plus which is the PP Banshee 115 (Single Tone). All three models use an AC battery back up on a DC motor.
PN20	Electro-Mechanical	20	9	1992–1995	Rotating 127 dB at 100 ft.	ACA's last known rotating siren. More commonly known as the RM-130.

American Signal Corporation sirens

Name	Type	Motor HP	Port Ratios	Years of Production	Sound Output Type	Notes
OM-117	Electro-Mechanical	15	8	1994–2004	Omni Directional 117 dB at 100 ft.	Rebranded version of ACA's Banshee siren, only in the 15 HP version.
OM-120	Electro-Mechanical	20	8	1998–2004	Omni Directional 120 dB at 100 ft.	Similar to the earlier ACA Banshee, but used a 9 port chopper and stator with slightly different housing and also came with battery back up.
RM-127	Electro-Mechanical	15	8	1995–2002	Rotating 127 dB at 100 ft.	The same as the single tone Penetrator-15.
RM-130	Electro-Mechanical	20	8	1995–2002	Rotating 127 dB at 100 ft.	The same as the earlier PN20.
C-125 AC	Electro-Mechanical	50	8/12	1995–2006	Omni Directional 125 dB at 100 ft.	The same as the Cyclone 125.
AL Series	Electronic	none	none	1995–Present	Omni Directional dB rating depends on how many drivers.	Similar to the Alertronic 4000, but now in different sizes. (AL Line is not shown on ASC's webpage)
AL-4000R	Electronic	none	none	1995	Rotating 124 dB at 100 ft.	A modernized version of the ACA AL-6000R and RE-1600.
Tempest (Rotating)	Electro-Mechanical	Comes in 7.5, 20, and 50 HP	8 (8/12 for T-135 AC)	1998–Present	Rotating 128–135 dB at 100 ft.	Three sirens in this line up: T-128, T-135 AC, and T-135 AC/DC The T-135 AC was known as ACA P-50, the name was changed after ACA's bankruptcy. The T-135 AC/DC is a siren that is bigger and more powerful than the T-128 and has a similar design and also has a battery backup system. This was introduced around 2007, replacing the T-135 AC.
Tempest (Omni Directional)	Electro-Mechanical	7.5	8	1998–Present	Omni-Directional 112–121 dB at 100 ft.	Two sirens in this line up: T-112 and the T-121 The T-121 is an 8 port siren that has a similar design to Federal Signal's Eclipse 8. The T-112 is a hornless version of the T-121.
Quadren	Electronic	none	none	1995–1998	Omni Directional dB rating depends on how many drivers.	Renamed the iForce after being redesigned in the early 2000s.
iForce	Electronic	none	none	2002–Present	Omni Directional dB rating depends on how many drivers.	The iForce is an electronic siren made by ASC that comes in many different sizes (Sound Cells) and only comes in single tone. Similar to Federal Signal's Modulator.
E-Class	Electronic	none	none	2002–Present	Omni Directional dB rating depends on how many drivers.	Speakers can be arranged in whichever pattern is needed. Very similar to ATI's omni-directional sirens.

External links

• http://americansignal.com/
• http://alertingcommunicators.com/
• https://wiki.thesirenboard.com/Category:Alerting_Communicators_of_America
• https://wiki.thesirenboard.com/Category:American_Signal_Corporation