Sounder 103 dB(A)

These sounders are used in workplaces where dangerous, explosive
atmospheres are to be expected

  • free selection of 49 different tones UKOOA/PFEER conformant
  • high sound pressure level of 105 dB(A), can be reduced by up to 15 dB(A) via a potentiometer
  • up to 2 tones can be selected externally in order to signal different alarms
  • works on DC voltages between 10 and 28 V DC, rated voltage 24 V DC
  • an input protector prevents damage due to incorrect connection without a zener barrier or galvanic isolation
  • can also be used outdoors thanks to housing made of self-extinguishing ABS and IP 66 protection system
  • categories 1G, 2G and 3G (Zones 0, 1 and 2)

Here you can find suitable zener barriers.

protection system

operating between +60 / –40 °C

Technical data

Electrical dataIS-A105N
Rated voltage24 V DC
Operating range10–28 V
Nominal current consumption25 mA (typical for connection to 24 V DC via 28 V / 300 Ω zener barrier)

Power must be connected via a zener barrier (max. 28 V DC, 93 mA DC, 0.66 W) or a galvanic isolator, specified by the system certificate.


Description Language Type Size Download

Product Sheet

  • English
pdf 2.3 MB Download


  • English
pdf 340 KB Download

Ordering details

Ordering detailsIS-A105-N
Rated voltage24 V DC
Article number32033800000

To make the order process easy for you and to ensure a secure delivery, please see the information on the final article numbers.

Article numbers for products with other voltages and options on request.

Product Benefits

  1. 1

    Intrinsically safe audible signalling

    105 dB(A) sounder for hazardous areas, with volume control and selectable tone stages.

  2. 2

    Zones 0, 1 and 2

    Certified for use in Ex zones 0, 1 and 2 when used with a certified zener barrier or galvanic isolator.

  3. 3

    Audible notification

    Choice of 49 unique alarm tones with three stages of tone control for distinctive signalling of specific events. Audible signals are synchronised across multiple units connected in series. Volume control adjusts output level to fit the signalling space required.

  4. 4

    IP 66 enclosure rating

    Suitable for use in all weather conditions due to the provided protection against driving rain, snow, ice, and dust. Withstands hose-directed spray during wash-down requirements.