Whelen Engineering Company, Inc.
Back-Up Alarms

Rugged alarms featuring electronics sealed in urethane to resist tough environmental conditions.

  • Glass filled nylon housing
  • Encapsulated solid-state electronics
  • Steam cleanable; pressure washable
  • Mount horizontally or vertically

WARNING: These products may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit whelen.com/regulatory.


Voltage 12 or 24 VDC
Decibel Ratings* WBUA107: 107 dB

WBUA97: 97 dB

WBUA112: 87-112 dB

WBUA112C: 112 dB

Operational Temperature -40° F to +170° F (-40° C to +77° C)
Certifications One million cycle test

Meets O.S.H.A

Bureau of Mines Regulations

State Regulations

Warranty 12 Months

* Decibel ratings for all alarms are +/-4dB (A) @ 4′