SON4L Alarm Sounder & LED Beacon

  • Automatic synchronisation on multi-sounder system.
  • Continuously rated.
  • Stainless steel fixings.
  • Unit can be mounted using external lugs (on AC versions) or internal BESA compatible fixing positions.
  • Duplicate cable terminations (in & out for daisy-chain installations).
  • Tropicalisation available on request.
  • Available with custom tone configurations and frequencies.


  • VdS approved: EN54-3 (CPD 89/106/EEC).

  • GOST-R approved. Cert: POCC GB-JB05-H00144.

SON4L Alarm Sounder & LED Beacon
Eac-logo Vds-approval Ce-approval Gost-approval

SON4L Alarm Sounder & LED Beacon

The SON4L is a compact, high output, 100dB(A) alarm sounder with integral L.E.D. array beacon. The robust fire retardant housing ensures the SON4L is suitable for all general signalling applications including fire, security and process control.


Maximum output: 100dB(A) @ 1 metre [91dB(A) @ 10ft/3m]
Nominal output: 99dB(A) @ 1m +/- 3dB - Tone 1 [90dB(A) @ 10ft/3m]
No. of tones: 10 (UKOOA / PFEER compliant)
No. of stages: 3
Volume control: On board potentiometer
Effective range: 30m/99ft @ 1KHz
Stage switching: Negative
Light source: 5 x high intensity L.E.D. array
Flash rate: 2 Hz
Peak/Effective Intensity cd: 3cd* - measured ref. to I.E.S.
Lens / L.E.D.: Amber & Red
Voltages DC: 12V dc; 24V dc; 48V dc
Reverse polarity diode protection on DC units.
Voltages AC: 24V ac; 115V ac; 230V ac
Ingress protection: IP66
Housing material: High impact UL94 V0 & 5VA FR ABS
Colour: Red (RAL3000), grey (RAL7038) & white.
Lens material: PC
Cable entries: 4 x M20 clearance gland knockouts in side & back
Terminals: 0.5 to 1.5mm² cables.
Operating temp: -25 to +55°C [-13° to +131°F]
Storage temp: -40 to +70°C [-40° to +158°F]
Relative humidity: 90% at 20°C [68°F]
Weight: DC: 0.30kg/066Ibs AC:0.40kg/0.88Ibs
*SPL data +/-3dB(A). Measured at optimum voltage.
*Candela measurements representative of performance with amber lens at optimum voltage.

Part Codes

Version: Part code:
12V dc SON4LDC12[x]/[y]
24V dc SON4LDC24[x]/[y]
48V dc SON4LDC48[x]/[y]
24V ac SON4LAC24[x]/[y]
115V ac SON4LAC115[x]/[y]
230V ac SON4LAC230[x]/[y]
[x] = Housing colour: G: Grey R: Red W: White
[y] = Lens colour: A: Amber, R: Red


Version: Voltage: Current:
12V dc +/-25% 50mA
24V dc +/-25% 50mA
48V dc +/-25% 40mA
24V ac 50/60Hz +/-10% 60mA
115V ac 50/60Hz +/-10% 25mA
230V ac 50/60Hz +/-10% 20mA

Tone Table

Stage 1 WAV file Frequency Description. Stg 2 Stg 3
T 1 /system/1/assets/files/000/000/419/419/e353c86c4/original/TF002.WAV 800/1000Hz @ 0.25 sec Alternating T 8 T 5
T 2 /system/1/assets/files/000/000/417/417/abf396de0/original/TF003.WAV 500/1200Hz @ 0.3Hz 0.5 sec Slow Whoop T 1 T 8
T 3 /system/1/assets/files/000/000/386/386/ceb4e488c/original/TF009.WAV 1200/500Hz @ 1Hz - DIN / PFEER P.T.A.P. T 1 T 8
T 4 /system/1/assets/files/000/000/382/382/2c2978b6a/original/TF017.WAV 544Hz (100mS)/440Hz (400mS) - NF S 32-001 554Hz T 2
T 5 /system/1/assets/files/000/000/405/405/214ccf82a/original/TF037.WAV 1000Hz Continuous - PFEER Toxic Gas T 1 T 6
T 6 /system/1/assets/files/000/000/395/395/631e82dc8/original/TF026.WAV Bell T 1 T 8
T 7 /system/1/assets/files/000/000/392/392/68d5d1294/original/TF029.WAV 800/1000Hz @ 7Hz Sweeping T 5 T 1
T 8 /system/1/assets/files/000/000/398/398/7c1bf5e00/original/TF025.WAV 2400/2900Hz @ 50Hz Sweeping T 5 T 1
T 9 /system/1/assets/files/000/000/402/402/9168c8c48/original/TF035.WAV 420Hz @ 0.625 sec Australian Alert T 10 T 5
T 10 /system/1/assets/files/000/000/400/400/aba6c8a51/original/TF036.WAV 500-1200Hz 3.75sec /0.25sec. Australian Evac. T 6 T 5
Country specific or custom tone configurations and alarm frequencies are available upon request.