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BExH120/BExDH120 ‘Hootronic’ Alarm Horn 1-22-070

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The flameproof BExH120 ‘Hootronic’ Siren is suitable for Zone 1 & 2 applications. The BExH120D authentically reproduces the traditional sounds of electro-mechanical devices whilst providing a significantly higher level of performance and reliability. The BExDH120
variant is also suitable for Zone 21 & 22.

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‘Hootronic’ Alarm Horn


The E2S Hootronic series of products faithfully reproduce the sounds made by legacy electro-mechanical signalling devices but in a modern, reliable and cost effective way. With output levels of up to 117.5dB(A) at 1 metre the BExH120 surpasses legacy electro-mechanical devices in performance and effectiveness, it is also continuously rated, requires zero maintenance and the signal quality will not degrade with age.


Datasheet Datasheet.pdf
Ex d Gas installation IS2491-P-C__BExH120D_Gas_.pdf
Ex d & Ex tD Gas & Dust installation IS2490-P-A__BExDH120D_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
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 Maritime register 19.00195.278.pdf
Declaration of Conformity DC-001_Issue_H_BExS__BExL.pdf
2D drawing (PDF) SK0114_Issue_B.pdf
2D drawing (DWG) SK0114_Issue_B.dwg
Hi-res product image 1 (TIFF) 1-22-070_BExH120D.tif
Lo-res product image 1 (JPG) 1-22-070_BExH120D.jpg


  • Very large termination area.
  • Ratchet adjustable stainless steel ‘U’ bracket.
  • Sound level ouputs up to 117.5dB(A) at 1 metre with

    a choice of 5 alarm sounds combining the signalling power of
    mutliple electro-mechanical products in one unit:

    1.Industrial Hooter

    2.High Frequency Mechanical Siren

    3.Medium Frequency Mechanical Siren

    4.Electro Mechanical Buzzer

    5.Mechanical Bell


Nominal output: 117.5dB(A) @ 1m +/- 3dB – Tone 4 [108.5dB(A) @ 10ft/3m]
No. of tones: 5
No. of stages: 3
Volume control: Yes
Effective range: 200m/656ft @ 1KHz
Voltages DC: 24vdc
Voltages AC: 115vac; 230vac
Stage switching: Negative
Ingress protection: IP66/67
Enclosure matl: Marine grade copper free
LM6 Aluminium
Enclosure finish: Chromate & powder coated – anti-corrosion
Colour: RAL3000 Red or RAL7038 Grey
(others available on request)
BExH120 flare: High impact UL94 V0 & 5VA FR ABS
BExDH120 flare: Anti-Static High impact ABS (Black)
Cable entries: Dual M20 ISO
(one stopping plug included)
Terminals: 0.5 – 2.5mm² (20-14 AWG)
Enclosure volume: <2 litres
Line monitoring: Blocking diode included
EOL Min. 500 Ohm 2w, or 3k3 Ohm 0.5w resistor
or diode (DC versions) can be fitted
Weight: DC: 3.20kg/7.04Ibs AC: 3.40kg/7.48Ibs
*SPL data +/-3dB(A). Measured at optimum voltage.

Current Consumption

Voltage: Max. I/P Volts: Current:
24V dc 30V dc 400mA
115V ac 50/60Hz 126.5V ac 130mA
230V ac 50/60Hz 253V ac 65mA

Part Codes

Part Code: Classification:
Grey Housing
& horn
II 2G Ex d IIB T4 Ta. -50 to +70°C
II 2G Ex d IIC T4 Ta. -50 to +55°C
Red Housing
& Horn
II 2G Ex d IIB T4 Ta. -50 to +70°C
II 2G Ex d IIC T4 Ta. -50 to +55°C
Grey Housing
& Black Horn
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
Red Housing
& Black Horn
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
** = Voltage reference:
Options: 24DC, 115AC, 230AC


  • ATEX certificate: KEMA 99ATEX6312,

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

    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 61241-0 : 2004 (Ed1), IEC 61241-1 : 2004 (Ed1)
  • Safety-integrity suitability: SIL1
  • Inmetro certificate: 10-IEx-0009
  • GOST-R certificate: POCC GB.JB05.B03365


The products from the BEx range are available as multiple unit assemblies with and without junction boxes. See the BExP data sheet for further info.

Tone Table

Stage 1 WAV file Frequency Description. Stg 2 Stg 3
T 1 /system/1/assets/files/000/000/411/411/491442314/original/TF046.WAV Industrial Hooter T 3 T 5
T 2 /system/1/assets/files/000/000/414/414/146644246/original/TF047.WAV High Frequency Mechanical Siren T 1 T 5
T 3 /system/1/assets/files/000/000/416/416/0c52c2259/original/TF048.WAV Medium Frequency Mechanical Siren T 1 T 5
T 4 /system/1/assets/files/000/000/413/413/c47bf00c7/original/TF049.WAV Electro Mechanical Buzzer T 2 T 5
T 5 /system/1/assets/files/000/000/423/423/854c33e83/original/TF050.WAV Mechanical Bell T 1 T 2
Country specific or custom tone configurations and alarm frequencies are available upon request.

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