Cranford Controls

A121 Alarm Sounder

Product Overview

The A121 is a very high output, 126dB(A) alarm sounder. High SPL in a robust, fire retardant IP66 housing ensures the A121 is suitable for all general signaling applications including fire, security and process control.


  • Automatic synchronisation on multi-sounder system.
  • Continuously rated.
  • Stainless steel fixings.
  • Unit can be mounted using external lugs 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.
  • ‘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 126dB(A) @ 1 metre
Nominal Output 121dB(A) @ 1m +/- 3dB – Tone 2
No. of Tones 45 (UKOOA / PFEER compliant)
No. of Stages 3
Volume Control Max. 121dB(A); Min. 112dB(A) – Tone 2
Effective Range 300m @ 1KHz
Voltages DC 24V dc (10-30V dc); 48V dc (35-60V dc)
[DC units can use 24V ac for single stage applications]
Voltages AC 24V ac; 115V ac; 230V ac
Stage Switching Negative or optional positive
Ingress Protection IP66
Housing Material High Impact UL94 V0 & 5A FR ABS
Colour Red (RAL3000) & Gret (RAL7038)

*For further product details, please refer to the Product Data Sheet

Part Numbers

24 V dc A121DC24[x]
48 V dc A121DC48[x]
24 V ac A121AC24[x]
115 V ac A121AC115[x]
230 V ac A121AC230[x]