This article lists the outdoor warning sirens built by Biersach & Niedermeyer Co., Alerting Communicators of America and American Signal Corporation.
| Name | Type | Motor HP | Port Ratios | Years of Production | Sound Output Type | Notes |
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| 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 | 40–50 | 8/12 | 1967–1981 | Omni Directional 120 dB at 100 ft. | The Cyclone 120 was the loudest Omni-Directional siren in the world until it was upgraded and became the Cyclone 125. 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. | The Cyclone 125 is the loudest Omni-Directional siren in the world, producing 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. |
| 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 19 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. Number of drivers range from 4 to 32 (single-tone) and 8 to 16 (dual-tone). |
| Alertronic 5000 | Electronic | none | none | 1983–1984 | Rotating 125 dB at 100 ft. | Very short lived siren, replaced by the AL-6000R. Currently no known images or video exist. |
| 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. Came in 4 drivers (Single-tone only). |
| Alertronic AL-6000R | Electronic | none | none | 1984–1995 | Rotating dB rating depends on how many drivers. | Replacement for the 5000. Came in 8 drivers (Single-tone) or 16 drivers (Dual-tone). This siren was also part of the Performance Plus lineup in the later years of ACA. |
| 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. |
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| 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. |
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