2 
•  Only operate these ADFs at temperatures between 23°F (–5°C) and 131°F (+55°C).  If used outside of this 
range, the filter may not perform as designed and may result in permanent eye injury and vision loss. 
 
 
 
 
 
 
 
GENERAL SAFETY INFORMATION 
 
This product contains no components made from natural rubber latex. 
Intended Use 
The 3M™ Welding Shield Assemblies WS Series are designed to help protect the wearer’s eyes from harmful 
radiation including visible light, ultra-violet radiation (UV) and infrared radiation (IR) resulting from certain  
arc-welding processes when used in accordance with these User Instructions.   Two sensors on the front of the 
ADF WS Series react independently at the moment the welding arc is struck and cause the filter to darken.  The 
ADF switches back to the light shade (shade 4) as soon as the welding arc has stopped. Two lithium batteries are 
used as the power source. The ADF will switch off automatically approximately 60 minutes after the last arc is 
detected.  Protection from ultra-violet radiation (UV) and infrared radiation (IR) is continuous, whether the ADF is 
in the light or the dark state.  In the event of battery or electronic failure, the welder remains protected against UV 
and IR radiation according to the darkest shade (shade 12).   
 
3M™ ADFs allows the welder to view their work clearly and safely during set-up, during the weld and after 
without interruption and without the burden or delay of manually lifting the shield or filter.  3M ADFs allow 
manual arc welding to be performed more quickly and accurately in comparison to traditional passive welding 
filter plates.  
 
Important Use Limitations: 
•  These products do not provide any protection from respiratory hazards that may result from welding processes 
or from other sources. 3M™ Welding Shields WS Series may be worn in conjunction with certain respirator 
models. For more information about respiratory protection for welders, contact 3M Technical Service at  
1-800-243-4630. In Canada, call Technical Service at 1-800-267-4414.  
•  The ADF WS-020/37156 is not suitable for gas welding (e.g., oxyacetylene), low-amperage TIG welding 
(below 20 amps), laser welding, or welding processes that require shade 13 or higher filters.  Use of this 
product for these applications may result in permanent eye injury and vision loss. 
•  Only operate the ADF at temperatures between 23°F (–5°C) and 131°F (+55°C).  If used outside of this range, 
the filter may not perform as designed and may result in permanent eye injury and vision loss.