European Standards
According to EN 169, the following shade levels are recommended:
Shade level chart
Current in amperes
Depending on the perception of the welder, it is possible to use the next higher or lower shade number.
The transmission of the welder filter is shown below:
The marking on the welder filter indicates:
Please note: All BOC auto-darkening helmets are made to EN 379 and 175 standards
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