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BExS120/BExDS120 Alarm Horn Sounders 123dB(A) 1-22-050

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The flameproof BExS120 alarm sounders are suitable for Zone 1 & Zone 2 applications
and the BExDS120 sounders also for Zone 21 & 22.

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Alarm Horn Sounders 123dB(A)


Sound level ouputs are up to 123dB(A) at 1 metre with a choice of 32 alarm tones and 3 remotely selectable stages.
The BEx range features enclosures manufactured from corrosion proof, marine grade copper free LM6 aluminium which is phosphated and powder coated.

The re-entrant flare horns are high impact, fire retardant ABS. All models have two M20 cable entries, large termination areas
containing in & out terminals (Ex de version only) and an ingress protection of IP66/67 (Ex d) and IP66 (Ex de).

For fire applications the BExS120D 24V dc siren is CPD EN89/106/EEC compliant (EN54-3 tested).


Datasheet Datasheet.pdf
Ex d Gas installation IS2421-P-F__BExS120_110D_Gas_Multilingual_.pdf
Ex d & Ex tD Gas & Dust installation IS2451-P-E__BExDS120_110D_Gas-Dust_Multilingual_.pdf
Ex de Gas installation IS2422-P-F__BExS120_110E_Gas_Multilingual_.pdf
Ex de & Ex tD Gas & Dust installation IS2452-P-E__BExDS120_110E_Gas-Dust_.pdf
IECEx certificate IECEx_KEM_10.0003X_Issue_2_BExS.pdf
IECEx certificate IECEx_KEM_10.0003_Issue_1.pdf
ATEX certificate DEKRA_99ATEX6312_Issue_4_BExS.pdf
ATEX certificate KEMA_99ATEX6312_Issue_3.pdf
VdS certificate VdS_G206011_BExS110D__BExS120D.pdf
EC Certificate of Conformity 0708-CPD-20225_BExS110D__BExS120D.pdf
INMETRO certificate 10-IEx-0009_Rev_1_BExS.pdf
Russian Ex certificate EAC_EU_C-GB.AA71.B.00273_20.pdf
RTN permit RTN_permit_PPC_00-29227.pdf
Russian Fire certificate Russian_Fire_Certificate_-GB.25..01082.PDF
Russian Maritime register 19.00195.278.pdf
Hong Kong Fire Dept. cert. HK_FSD_BEx.pdf
Declaration of Conformity DC-001_Issue_H_BExS__BExL.pdf
Declaration of Conformity DC-068_Issue_B_BExS_Ex_de.pdf
Declaration of Performance DP_-_0786-CPD-20225-Issue_A_BExS110D__BExS120D.pdf
2D drawing (PDF) SK0114_Issue_B.pdf
2D drawing (PDF) SK0115_Issue_B.pdf
2D drawing (DWG) SK0114_Issue_B.dwg
2D drawing (DWG) SK0115_Issue_B.dwg
Hi-res product image 1 (TIFF) 1-22-050_BExS120D.tif
Lo-res product image 1 (JPG) 1-22-050_BExS120D.jpg


  • Automatic synchronisation on multi-sounder system.
  • Very large termination area.
  • Ratchet adjustable stainless steel ‘U’ bracket.
  • IN & OUT terminals (Ex de version only).
  • ‘Programmable’ version available:

    - 45 alarm tones

    - 4 remotely selectable stages

    - Any tone can be assigned to any stage

    - User configurable continuous frequency tone


Maximum output: 123dB(A) @ 1 metre [114dB(A) @ 10ft/3m]
Nominal output: 117dB(A) @ 1m +/- 3dB – Tone 2 [108dB(A) @ 10ft/3m]
No. of tones: 32 (UKOOA / PFEER compliant)
No. of stages: 3
Volume control: Max. 117dB(A);
Min. 108dB(A) – Tone 2
Effective range: 200m/656ft @ 1KHz
Voltages DC: 12vdc; 24vdc; 48vdc
Voltages AC: 115vac; 230vac

Stage switching:|Negative or positive|
|Ingress protection:|S120D : IP66/67 S120E : IP66|
|Housing material:|Marine grade copper free
LM6 Aluminium|
|Housing finish:|Phosphated & powder coated finish – anti-corrosion.|
|Colour:|RAL3000 Red
(others available on request)|
|BExS120 flare:|High impact UL94 V0 & 5VA FR ABS (Red)|
|BExDS120 flare:|Anti-Static High impact ABS (Black)|
|Cable entries:|Dual M20 ISO (one stopping plug inc)|
|Terminals:|0.5 to 2.5mm² cables.|
|Line monitoring:|Min. 500 Ohm 2w, or 3k3 Ohm
0.5w res. or diode within
Exd enclosure (dc versions).|
|Weight:|DC: 3.20kg/7.04Ibs AC: 3.40kg/7.48Ibs|
|\2.*SPL data +/-3dB(A). Measured at optimum voltage.|

Current Consumption

Version: Voltage: Current:
12V dc +/-25% 850mA
24V dc +/-25% 800mA
48V dc +/-25% 420mA
115V ac 50/60Hz +10/-10% 180mA
230V ac 50/60Hz +10/-10% 90mA

Part Codes

Part Code: Classification:
II 2G Ex d IIB T4 Ta. -50° to +70°C
II 2G Ex d IIC T4 Ta. -50° to +55°C
1ExdIICT4 Ta. -50° to +55°C
II 2G Ex de IIB T4 Ta. -50° to +70°C
II 2G Ex de IIC T4 Ta. -50° to +55°C
2ExdeIICT4 Ta. -50° to +55°C
II 2G Ex d IIB T4 Ta. -50° to +70°C
II 2G Ex d IIC T4 Ta. -50° to +55°C
II 2D Ex tD A21 IP67 T115
based on a max. Ta. of 70°C
1ExdIICT4 Ta. -50° to +55°C T100°C
DIP A21 TaT4
II 2G Ex de IIB T4 Ta. -50° to +70°C
II 2G Ex de IIC T4 Ta. -50° to +55°C
II 2D Ex tD A21 IP66 T115
based on a max. Ta. of 70°C
2ExdeIICT4 Ta. -50° to +55°C T100°C
DIP A21 Ta T4
** = Voltage reference:
Options: 12DC, 24DC, 48DC, 115AC, 230AC
Add ‘-P’ to part number for Programmable version


  • ATEX certificate: KEMA 99ATEX6312,

    EN 60079-0 : 2006, EN 60079-1 : 2007,

    EN 60079-7 : 2003, EN 61241-0 : 2006,

    EN 61241-1 : 2004
  • IECEx certificate: IECEx KEM 10.0003,

    IEC 60079-0 : 2004 (Ed4), IEC 60079-1 : 2007 (Ed6),

    IEC 60079-7 : 2001 (Ed3), IEC 61241-0 : 2004 (Ed1),

    IEC 61241-1 : 2004 (Ed1)
  • GOST-R certificate: POCC GB.JB05.B03365
  • VdS certificate: G206011
  • CPD certificate: 0786-CPD-20225
  • Safety-integrity suitability: SIL1
  • Inmetro certificate: 10-IEx-0009

Tone Table

Stage 1 WAV file Frequency Description. Stg 2 Stg 3
T 1 /system/1/assets/files/000/000/405/405/214ccf82a/original/TF037.WAV Continuous 1000Hz Toxic Gas Alarm T 31 T 11
T 2 /system/1/assets/files/000/000/419/419/e353c86c4/original/TF002.WAV Alternating 800/1000Hz at 0.25s intervals T 17 T 5
T 3 /system/1/assets/files/000/000/417/417/abf396de0/original/TF003.WAV Slow Whoop 500/1200Hz at 0.3Hz with 0.5s gap repeated T 2 T 5
T 4 /system/1/assets/files/000/000/420/420/50f9ee7a7/original/TF004.WAV Sweeping 800/1000 at 1Hz T 6 T 5
T 5 /system/1/assets/files/000/000/421/421/b578af8a9/original/TF005.WAV Continuous at 2400Hz T 3 T 27
T 6 /system/1/assets/files/000/000/422/422/42b72dd93/original/TF006.WAV Sweeping 2400/2900Hz at 7Hz T 7 T 5
T 7 /system/1/assets/files/000/000/373/373/a686b0abe/original/TF007.WAV Sweeping 2400/2900Hz at 1Hz T 10 T 5
T 8 /system/1/assets/files/000/000/376/376/00cd26f9e/original/TF008.WAV Siren 500/1200/500Hz at 0.3Hz T 2 T 5
T 9 /system/1/assets/files/000/000/386/386/ceb4e488c/original/TF009.WAV Sawtooth 1200/500Hz at 1Hz T 15 T 2
T 10 /system/1/assets/files/000/000/374/374/021ee6540/original/TF010.WAV Alternating 2400/2900Hz at 2Hz T 7 T 5
T 11 /system/1/assets/files/000/000/377/377/ac5498db0/original/TF011.WAV Intermittent 1000Hz at 0.5Hz General alarm T 31 T 1
T 12 /system/1/assets/files/000/000/375/375/771bd7a3e/original/TF012.WAV Alternating 800/1000Hz at 0.875Hz T 4 T 5
T 13 /system/1/assets/files/000/000/378/378/6380218ec/original/TF013.WAV Intermittent 2400Hz at 1Hz T 15 T 5
T 14 /system/1/assets/files/000/000/379/379/51c1bb5a9/original/TF014.WAV Intermittent 800Hz 0.25s on 1s off T 4 T 5
T 15 /system/1/assets/files/000/000/380/380/06feaa7b3/original/TF015.WAV Continuous at 800Hz T 2 T 5
T 16 /system/1/assets/files/000/000/381/381/93f51c79a/original/TF016.WAV Intermittent 660Hz 150mS on, 150mS off T 18 T 5
T 17 /system/1/assets/files/000/000/382/382/2c2978b6a/original/TF017.WAV Alternating 544Hz (100mS)/440Hz(400mS) T 2 T 27
T 18 /system/1/assets/files/000/000/397/397/d6d84d0c3/original/TF018.WAV Intermittent 660Hz 1.8s on, 1.8s off T 2 T 5
T 19 /system/1/assets/files/000/000/383/383/11797b764/original/TF019.WAV 1400Hz to 1600Hz sweep up over 1s -1600Hz to 1400Hz sweep down over 0.5s T 2 T 5
T 20 /system/1/assets/files/000/000/384/384/5c30f9f4d/original/TF020.WAV Continuous 660Hz T 2 T 5
T 21 /system/1/assets/files/000/000/385/385/a85a0a356/original/TF021.WAV Alternating 554/440Hz at 1Hz T 2 T 5
T 22 /system/1/assets/files/000/000/387/387/d33e565a9/original/TF022.WAV Intermittent 554Hz at 0.875Hz T 2 T 5
T 23 /system/1/assets/files/000/000/388/388/b4cf9203e/original/TF023.WAV 800Hz pulsing at 2Hz T 6 T 5
T 24 /system/1/assets/files/000/000/389/389/68683d240/original/TF024.WAV Sweeping 800/1000Hz at 50Hz T 29 T 5
T 25 /system/1/assets/files/000/000/398/398/7c1bf5e00/original/TF025.WAV Sweeping 2400/2900Hz at 50Hz T 29 T 5
T 26 /system/1/assets/files/000/000/395/395/631e82dc8/original/TF026.WAV Simulated bell sound T 2 T 1
T 27 /system/1/assets/files/000/000/390/390/10abe0caa/original/TF027.WAV Continuous 554Hz T 26 T 5
T 28 /system/1/assets/files/000/000/391/391/5f7a58b54/original/TF028.WAV Continuous 440Hz T 2 T 5
T 29 /system/1/assets/files/000/000/392/392/68d5d1294/original/TF029.WAV Sweeping 800/1000Hz at 7Hz T 7 T 5
T 30 /system/1/assets/files/000/000/402/402/9168c8c48/original/TF035.WAV 420Hz repeating 0.625s on, 0.625s off Australian alert signal T 32 T 5
T 31 /system/1/assets/files/000/000/386/386/ceb4e488c/original/TF009.WAV 1200/500Hz at 1 Hz Prepare to Abandon Platform T 11 T 1
T 32 /system/1/assets/files/000/000/400/400/aba6c8a51/original/TF036.WAV Sweeping 500/1200Hz 3.75s on, 0.25s off 15Hz T 26 T 1
Country specific or custom tone configurations and alarm frequencies are available upon request.

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