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Oregon State University

Warning Signs and Labels

 All Class 2, 3 and 4 laser equipment must be labeled indicating hazard classification, output power/energy, and lasing material or wavelength with words and symbols as indicated below:

  • Class 2 laser equipment: CAUTION, Laser Radiation (or laser symbol), Do Not Stare Into Beam

caution class 2

  • Class 3R laser equipment, below MPE: Danger, Laser Radiation (or laser symbol), Do Not Stare into Beam or View Directly with Optical Instruments

caution class 3

  • Class 3R laser equipment, above MPE: DANGER, Laser Radiation (or laser symbol), Avoid Direct Eye Exposure

danger class 3R

  • Class 3B laser equipment: DANGER, Laser Radiation (or laser symbol), Avoid Direct Exposure to Beam

danger class 3

  • Class 4 laser equipment: DANGER, Laser Radiation (or laser symbol), Avoid Eye or Skin Exposure to Direct or Scattered Radiation

danger class 4

 

Labels and warning signs should be displayed conspicuously in areas where they would best serve to warn individuals of potential safety hazards.  Normally, signs are posted at entryways to laser controlled areas and labels are affixed to the laser in a conspicuous location.

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