The source is Class 4
Marking lasers are powerful enough to injure eyes and skin and to ignite materials. The bare source is classified Class 4, the highest hazard class.
The system can be Class 1
When the beam path is fully enclosed and interlocked so no hazardous radiation can escape during normal use, the complete system is Class 1 — safe without eyewear.
On a production line
Coders on open conveyors are guarded with shields around the marking zone, sized for the product, with interlocks on access panels. A risk assessment defines what is needed.
Do not forget fume
Laser marking creates particulates and gases. Extraction at source with appropriate filtration is part of a safe installation.
