Market Application Guide

Hazardous Location/Intrinsically Safe

Class I Div II Groups A, B, C, & D


Hazardous location applications include those where vapors or dust may be present and require electronic devices that are certified to be intrinsically safe (i.e. will not emit a spark).  Mallory Sonalert has a line of audible alarms uL and cUL approved for use in Class I, Division II, Groups A, B, C, & D hazardous location applications.


  • Petroleum refining facilities
  • Dip tanks (plating, cleaning, etc)
  • Dry cleaning plants
  • Organic coating manufacturing
  • Spray finishing areas
  • Petroleum dispensing areas
  • Solvent extraction plants
  • Inhalation anesthetics locations
  • Utility gas plants and operations
  • Aircraft hangars
  • Fuel servicing areas
  • Plants using pyroxylin

Alarms to Use for These Applications

Any SCH series Mallory alarm (54 models available).  Some popular models include SCH628R, SCH307NR, SCH648R, SCH110R, & SCH250R.

Accessories to Consider

ACC01 (Metal “L” Bracket), SCVC (Volume Shutter)

SCH Series
cUL & UL Approved
NEMA 4X Approved

Call 317-612-1000 or contact us for more details