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About Reverse Alarm

As a member of the Bignall group of companies Reverse Alarm benefits from proven world class design, manufacturing and quality resources.

Continual investment and innovation allows us to offer a comprehensive support service to all our customers.

Please contact us, we will be delighted to help.

ra90b reverse alarm

ra90b reverse alarm


  • 12/24v dual voltage
  • Adverse polarity protected
  • Output at 1 metre 12v: 90db; 24v: 95db +/- 2 db
  • Spike protected
  • Speaker 8 ohm 2 w 66 mm Mylar cone weatherproof.
  • Frequency 1100Hz
  • Current consumption:
    0.25A at 12v
    0.5 A at 24v
  • 12v and 24v Digital voice applications 0.25A

RA90B alarms are guaranteed against mechanical and electrical faults for two years. No quibble exchange policy.

ReverseAlarm units are manufactured in the Uk and carry the CE Mark