Mallory’s extra loud bracket alarms are available in bracket or wall-mount packages. These alarms emit over 105 dB @ 1 Meter and come in a variety of shapes and sizes. Sound types include continuous tone, slow pulse tone, warble tone, and siren tone.
The following model numbers are sealed and are suitable for use in environments where they may be exposed to liquids or moisture:
- PS-520Q, PS-521Q, PS-522Q
- PS-531Q
- PS-550Q, PS-551Q, PS-552Q
- PS-593SCQ
Extra Loud Bracket Alarm Applications
- Security
- Vehicle Alarms
- Anti-Theft Devices
- Noisy Environments
- Applications where the person is 20 to 50 feet away from the alarm

- Over 100 dB @ 1 Meter
- Variety of Shapes & Sizes
- Bracket & Wall Mount Packages
- Bare Wires or Connector
- dB Distance = 1 Meter
- For Security Applications or Noisy Environments
Image | Model # | LED Color | Sound Type | Freq (Hz) | Volt Rating | Typical dB | Size | hf:att:pa_led-color | hf:att:pa_sound-type | hf:att:pa_frequency-hz | hf:att:pa_voltage-rating | hf:att:pa_typical_db_max_voltage | hf:att:pa_size | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
PS-520Q | Continuous | 3000 | 5 to 15 DC | 105 | 40 x 45 x 58 mm | continuous | 3000 | 5-to-15-dc | 105 | 40-x-45-x-58-mm | |||||
PS-521Q | Slow Pulse | 3000 | 5 to 15 DC | 105 | 40 x 45 x 58 mm | slow-pulse | 3000 | 5-to-15-dc | 105 | 40-x-45-x-58-mm | |||||
PS-522Q | Slow Warble | 2.5K-3.5K | 5 to 15 DC | 105 | 40 x 45 x 58 mm | slow-warble | 2-5k-3-5k | 5-to-15-dc | 105 | 40-x-45-x-58-mm | |||||
PS-523AQ | Fast Siren | 1.5K-4K | 5 to 15 DC | 105 | 40 x 45 x 58 mm | fast-siren | 1-5k-4k | 5-to-15-dc | 105 | 40-x-45-x-58-mm | |||||
PS-531Q | Slow Pulse | 2800 | 5 to 15 DC | 105 | 85 x 42 mm | slow-pulse | 2800 | 5-to-15-dc | 105 | 85-x-42-mm | |||||
PS-550DG-24AQ | Green | Continuous | 2800 | 6 to 28 DC | 105 | 54 x 41 mm | green | continuous | 2800 | 6-to-28-dc | 105 | 54-x-41-mm | |||
PS-550DG-AQ | Green | Continuous | 2800 | 5 to 15 DC | 105 | 54 x 41 mm | green | continuous | 2800 | 5-to-15-dc | 105 | 54-x-41-mm | |||
PS-551D-220VQ | Slow Pulse | 2900 | 90 to 250 Vac/dc | 105 | 54 x 41 mm | slow-pulse | 2900 | 90-to-250-vac-dc | 105 | 54-x-41-mm | |||||
PS-551DBQ | Blue | Slow Pulse | 2800 | 5 to 15 DC | 105 | 54 x 41 mm | blue | slow-pulse | 2800 | 5-to-15-dc | 105 | 54-x-41-mm | |||
PS-551DGQ | Green | Slow Pulse | 2800 | 5 to 15 DC | 105 | 54 x 41 mm | green | slow-pulse | 2800 | 5-to-15-dc | 105 | 54-x-41-mm | |||
PS-551DRQ | Red | Slow Pulse | 2800 | 5 to 15 DC | 105 | 54 x 41 mm | red | slow-pulse | 2800 | 5-to-15-dc | 105 | 54-x-41-mm | |||
PS-551DYQ | Yellow | Slow Pulse | 2800 | 5 to 15 DC | 105 | 54 x 41 mm | yellow | slow-pulse | 2800 | 5-to-15-dc | 105 | 54-x-41-mm | |||
PS-551Q | Slow Pulse | 2800 | 5 to 15 DC | 105 | 54 x 41 mm | slow-pulse | 2800 | 5-to-15-dc | 105 | 54-x-41-mm | |||||
PS-552Q | Slow Warble | 2.2K-2.9K | 5 to 15 DC | 105 | 54 x 41 mm | slow-warble | 2-2k-2-9k | 5-to-15-dc | 105 | 54-x-41-mm | |||||
PS-554DY-24AQ | Yellow | Fast Pulse | 2800 | 16 to 28 DC | 105 | 54 x 41 mm | yellow | fast-pulse | 2800 | 16-to-28-dc | 105 | 54-x-41-mm | |||
PS-554DY-AQ | Yellow | Fast Pulse | 2800 | 5 to 15 DC | 105 | 54 x 41 mm | yellow | fast-pulse | 2800 | 5-to-15-dc | 105 | 54-x-41-mm | |||
PS-554F-12V-VRQ | Fast Pulse | 2800 | 5 to 15 DC | 100 | 54 x 41 mm | fast-pulse | 2800 | 5-to-15-dc | 100 | 54-x-41-mm | |||||
PS-593SCQ | Fast Siren | 1.5K-3.5K | 5 to 15 DC | 105 | 55 x 53 mm | fast-siren | 1-5k-3-5k | 5-to-15-dc | 105 | 55-x-53-mm | |||||
PS-723BQ | Fast Siren | 2.5K-4.5K | 5 to 15 DC | 105 | 39 x 47 x 23 mm | fast-siren | 2-5k-4-5k | 5-to-15-dc | 105 | 39-x-47-x-23-mm | |||||
PS-733EWDBQ | Blue | Fast Siren | 2.5K-4.5K | 5 to 15 DC | 90 | 32 x 46 x 18 mm | blue | fast-siren | 2-5k-4-5k | 5-to-15-dc | 90 | 32-x-46-x-18-mm | |||
PS-733EWDGQ | Green | Fast Siren | 2.5K-4.5K | 5 to 15 DC | 90 | 32 x 46 x 18 mm | green | fast-siren | 2-5k-4-5k | 5-to-15-dc | 90 | 32-x-46-x-18-mm | |||
PS-733EWDRQ | Red | Fast Siren | 2.5K-4.5K | 5 to 15 DC | 90 | 32 x 46 x 18 mm | red | fast-siren | 2-5k-4-5k | 5-to-15-dc | 90 | 32-x-46-x-18-mm | |||
PS-733EWDYQ | Yellow | Fast Siren | 2.5K-4.5K | 5 to 15 DC | 90 | 32 x 46 x 18 mm | yellow | fast-siren | 2-5k-4-5k | 5-to-15-dc | 90 | 32-x-46-x-18-mm | |||
PS-733PRQ | Red | Fast Siren | 2.5K-4.5K | 5 to 15 DC | 90 | 32 x 46 x 16 mm | red | fast-siren | 2-5k-4-5k | 5-to-15-dc | 90 | 32-x-46-x-16-mm | |||
PS-733PYQ | Yellow | Fast Siren | 2.5K-4.5K | 5 to 15 DC | 90 | 32 x 46 x 16 mm | yellow | fast-siren | 2-5k-4-5k | 5-to-15-dc | 90 | 32-x-46-x-16-mm | |||
PS-733WDB-SQ | Blue | Fast Siren | 2.5K-4.5K | 5 to 15 DC | 90 | 32 x 46 x 16 mm | blue | fast-siren | 2-5k-4-5k | 5-to-15-dc | 90 | 32-x-46-x-16-mm | |||
PS-733WDG-SQ | Green | Fast Siren | 2.5K-4.5K | 5 to 15 DC | 90 | 32 x 46 x 16 mm | green | fast-siren | 2-5k-4-5k | 5-to-15-dc | 90 | 32-x-46-x-16-mm | |||
PS-733WDR-SQ | Red | Fast Siren | 2.5K-4.5K | 5 to 15 DC | 90 | 32 x 46 x 16 mm | red | fast-siren | 2-5k-4-5k | 5-to-15-dc | 90 | 32-x-46-x-16-mm | |||
PS-733WDY-SQ | Yellow | Fast Siren | 2.5K-4.5K | 5 to 15 DC | 90 | 32 x 46 x 16 mm | yellow | fast-siren | 2-5k-4-5k | 5-to-15-dc | 90 | 32-x-46-x-16-mm | |||
PS-983Q | Fast Siren | 1.2K-1.9K | 5 to 15 DC | 105 | 51 x 35 mm | fast-siren | 1-2k-1-9k | 5-to-15-dc | 105 | 51-x-35-mm |