AVR 20: Alarm Flasher and Sounder

This sounder/flashers operates at 24VDC. The sounder can be permanently disabled so that unit acts as a flasher only. These units are designed for internal use. These are available in Red or Amber.

IS-A105N: Intrinsically Safe Alarm Sounder

The IS-A105N is a high output, 105dB alarm sounder. Approvals include ATEX, IECEx and GOST-R for Zone 0 applications and FM approval for Class I Division 1 and Class I Zone 0 applications.

The IS-A105N is suitable for all intrinsically safe signalling applications including fire, security and process control.

IS-L101L : Intrinsically Safe LED Beacon

The IS-L101L unit is an intrinsically safe field mounting beacon which provides a bright
flashing warning signal.


The unit can be used independently or combined with an IS-A105N 49 alarm sounder. Combination
units can utilise a common zener barrier or galvanic isolator and may be coupled together or
mounted seperately. With the IS-A105N the alarm accept function can be utilised. By closing a pair of
external contacts (i.e push switch) the operator may silence the alarm for set periods between 5
seconds and 2 hours. If after the preset time the alarm condition still exists the sounder will activate
again.