Mistake-Proofing Resource Center


Sirens are audible alarms and normally are used to convey an emergency situation. The emergency can be safety or process related (such as a line shutdown). Sirens are activated by the output from a relay, PLC, or process control system.


  • To warn of an unsafe condition.
  • To notify of a deviation of a critical process parameter from its set point.
  • To summon help to an area.


  • People associate sirens with an emergency.
  • Can be located remotely from the process.
  • Models are available for indoors and outdoors applications.
  • Can sound up to 130 db.