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Auto-darkening Welding Helmets

Auto-darkening Welding Helmets

If you ask a welder what is the best tool for them? Every welder replies to the auto-darkening welding helmets. Expert welders say that auto-darkening welding helmets are a true blessing for them. It is true because they don’t need to flip the lens or adjust the helmet during their projects.


Many beginner welders want to know the active components of auto-darkening welding helmets. So here we came up with the complete guide for you.

Let’s dive into details.

How do auto-darkening helmets work?

Auto-darkening welding helmets have advanced technology with auto-darkening filtered lenses. When you start using the auto-darkening welding helmet, it has the shade three filters. It is a protection shade that works like sunglasses in daylight. However, auto-darkening welding helmets have different light sensors near the lens. These sensors help to identify the correct shading for the filter.

The sensors automatically activate when you strike the arc. It will filter the light and switch the lens shade.

Components of auto-darkening welding helmets

Now you know how auto-darkening welding helmets work. Keep in mind that it has fantastic components to make its working possible.

So here we are going to discuss its fantastic and essential components that help you understand its working more effectively.

The UV/IR filter

Auto-darkening welding helmets have a UV layer that protects the welders from ultraviolet rays. These filters help the welders even when the lenses are not active. In addition, it has six metallic layers, of which five layers are of silver, and the sixth layer has aluminium oxide. The metallic filters aim to filter out the IR radiations that protect the welder from heat damage.

However, these filters work in the combination of metallic and polarization filters. So it will perfectly protect the welder from UltraViolet rays. Its glass layer also works as a filter to prevent UV radiation. Keep in mind that UV radiations have the greater penetration power. So it might pass through the glass layer. But the metallic and polarization layers work best to filter the ultraviolet rays and provide optimal coverage to welders.

Polarization filter

Auto-darkening welding helmets have three polarization filters. These polarization filter layers come after every layer of the UV and IR filters. So all size layers of UV and IR filters work in combination with the three layers of polarization filters.

However, these three layers help the welders to protect themselves from the visible light of the welding arc. Keep in mind that arc light is bright and intense that can damage the welder skin.

Liquid crystals cell

Auto-darkening welding helmets also have two liquid crystal cell layers between the polarizing filters. So when you stimulate the electricity, these two layers bend the light with the right power.

Arc sensors + light sensors

Arc and light sensors combine to determine the light intensity. When it detects the light intensity, then it set the lens according to it. It has various light and arc sensors to put the lens at the right frequency.

It will filter the extra light that is suitable for the welder’s health. However, the arc sensors deal with intensely bright lights.


So, whenever you start the welding, ensure you have one of this helmets nearby. A wide variety of Auto-darkening helmets can be purchased online¬†And they don’t cost a fortune this days. Check them out!


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