Lasers (Classes 3B & 4)

Version: 1.0

Updated: 1 December 2024

Document Summary

This Safe Work Procedure outlines safety measures for handling lasers classified as Classes 3B and 4. Only accredited Laser Operators who have completed a Laser Safety course are permitted to use these lasers, and a qualified Laser Safety Officer must be appointed where they are operated. Manufacturer instructions must always be followed.

Class 3B lasers can cause direct eye injury but pose no skin hazard from diffuse reflections. Protective eyewear and a key switch with a safety interlock are mandatory. Class 4 lasers are more hazardous, capable of causing severe eye and skin injuries, igniting combustible materials, and posing fire risks. These lasers require stringent control, including preventing unauthorized access, wearing BS EN207-certified laser safety glasses, and using long-sleeved clothing and trousers for skin protection. Warning signs must be displayed in all areas where these lasers are used to ensure safety.

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