Introducing the Belltronic range of digital alternative to electro-mechanical bells

BExH120 'Belltronic' Explosion Proof Bell

  • Marine grade, corrosion proof, LM6 aluminium enclosure.
  • Ingress protection IP66/67
  • Stainless steel fixings
  • Dual M20 cable entries - adaptors available.
  • Stopping plug included.
  • Reverse polarity diode fitted.
  • Digitally stored mechanical bell sound.
  • Continuously rated.
  • Maintenance free.
  • Very large termination area.
  • Ratchet adjustable stainless steel ‘U’ bracket.


  • IECEx KEM 10.0003X
    IEC 60079-0 : 2011
    IEC 60079-1 : 2007-4
    IEC 60079-31 : 2013

    EN 60079-0 : 2012 + A11
    EN 60079-1 : 2007
    EN 60079-31 : 2014

  • TR-CU Ex EAC certificate: RU C-GB.AA71.B.00109

  • Safety-integrity suitability: SIL1

  • Inmetro certificate: 10-IEx-0009

BExH120 'Belltronic' Explosion Proof Bell
Ex-eac-logo Eac-logo Iecex-approval Atex-approval Ce-approval Inmetro-approval

BExH120 'Belltronic' Explosion Proof Bell

The flameproof BExH120 Belltronic Signalling Bell is suitable for Zone 1, 2, 21 & 22 applications. Approved to IECEx, ATEX, Ex EAC and INMETRO standards. . The BExH120 authentically reproduces the traditional sound of a electro-mechanical bell whilst providing a significantly higher level of performance and reliability.

The digitally stored bell recording is output via a class D amplifier achieving sound levels exceeding the performance of a mechanical bell whilst offering a continuously rated signal. The radial horn design not only physically emulates the traditional bell it also replicates the distribution of the audible signal.


Nominal output: 106dB(A) @ 1m +/- 3dB [97dB(A) @ 10ft/3m]
Volume control: Yes
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 finish - anti-corrosion.
Colour: RAL3000 Red
Grey RAL7038
Special - available on request
BExH120 horn: High impact UL94 V0 & 5VA FR ABS
Cable entries: Dual M20 ISO (one stopping plug inc)
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
Relative humidity: 95% - Additional tropicalisation is recommended for applications where both high relative humidity and high ambient temperatures exist
Weight : DC: 3.20kg/7.04Ibs AC: 3.40kg/7.48Ibs

Current Consumption

Voltage: Current:
24V dc 400mA
115V ac 50/60Hz 130mA
230V ac 50/60Hz 65mA

Part Codes

Version: Part code:
Product type: BExH120 Explosion proof Belltronic
Type: DR Ex d, Radial omni-directional horn
Voltage: DC024
24V dc
115V ac
240V ac
Cable Entry Type:[e]

2 x M20x1.5mm
2 x 1/2" NPT - adaptors
2 x 3/4" NPT - adaptors
2 x M25x1.5mm - adaptors
1 x 1/2" NPT - adaptor
1 x 3/4" NPT - adaptor
1 x M25x1.5mm - adaptor
M20 stopping plugs for unused entries supplied
plug material: [m]
Nickel Plated
Stainless Steel
Bracket material: [s] 1
A2 304 Stainless Steel
A4 316 Stainless Steel
A2 304 St/St with Equip. Tag
A4 316 St/St with Equip. Tag (304)
Product version: [v] A1 Default - IECEx, ATEX, Ex EAC & INMETRO
Enclosure colour: [x] R
Red RAL3000
Grey RAL7038
Special - contact E2S


  • 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 tb IIIC T100°C Db Ta -50°C to +55°C
  • II 2D Ex tb IIIC T115°C Db Ta -50°C to +70°C

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.