How Do Auto-Darkening Welding Helmets Work

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The welding helmets are the best safety tools; everyone wants to produce significant results without harming themselves. Like everything changes with time, similarly, welding helmets are also transformed. Previously, there were only passive helmets.

No doubt, these old school welding helmets provide the utmost protection during welding experience but don’t fulfill the welders standard.

The manufacturers looked for the solution to this problem and invented automatic welding helmets. Comparatively, these helmets were offered more comfort and ease to the users and come up with some really unique features.

An auto-darkening welding helmet is a type of automatic welding helmet. These helmets are known as the professional welding helmets and are worth investing in.

Ever welded without a mask? It’s like sucking in smoke from the filter of your cigarettes.

Wondering how it functions? Then bear with us. In this post, we will explain in detail the working of auto-darkening helmets and their other aspects. So, let’s read on.

How Does An Auto-Darkening Welding Helmet WorkHow Does An Auto-Darkening Welding Helmet Work

The auto-darkening welding helmets are the most favorite welders’ choice because they let the welders work without interruption. These welding helmets are a gift for the welders in many ways like:

  • They are designed so that the welder won’t feel uncomfortable or stressed.
  • During welding, the auto darkening lens doesn’t flip repeatedly.
  • It’s easy to adjust the amount of light.
  • It consists of lenses that allow the welder to view the welding material without taking off their helmets compared to the old school welding helmets.

To understand how do auto-darkening welding helmets work, it is essential to know about their design and physical structure. The professional welding helmet possesses auto-darkening filter lenses made up of a unique liquid-crystal display (LCD), which resembles a television screen.

The auto darkening helmet either comes with chargeable solar batteries, rechargeable batteries, or a combination of both. Due to the presence of four sensors, most people also call it a 4 sensor welding helmet. Besides sensors, the welding helmets also has a filter lens—the lenses, when inactive is basically shade of three to four numbers.

However, soon they’re activated, the arc sensors start detecting light changes in the surrounding and switch the lens filters accordingly. In other words, the lens begins to get darken (around shade 5-6) with the start of the welding processes.

The automatic helmets has light sensors installed close to the lens that helps the helmet identify the welding arc that darkens the welding lens within seconds.

Upon lighting the arc, lens filters get activated again. The sensors limit the weld arcs automatically and stimulate the filters that control how blear the lens might go.

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Components of Auto-Darkening Welding HelmetsComponents of Auto-Darkening Welding Helmets

To better understand the working of automatic welding helmets, let’s briefly discuss their components.

The is consists of four components

The Ultraviolet Filter

It is a protective filter that protect against harmful UV rays, both when the lens is active.

Polarization Filter

Polarization filters are present after every UV layer. These filters are three in number, and all collectively safeguard the welder from the arc’s apparent light.

Two Liquid Crystal Cell

In between the three polarization filters, two liquid crystal cells also exist. The prime function of these cells is to bend the light when provided with electricity.

Arc and Light Sensors

There are various arc and light sensors in a welding helmet. Both of these sensors analyze the light intensity and make the lens dark.

The arc sensors deal with the bright light given off by the welding arc, while light sensors wipe out the extra light.

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7 Reasons Auto-Darkening Welding Helmets Is Not Working7 Reasons Auto-Darkening Welding Helmet Is Not Working

The auto-darkening welding helmet is among the most significant protective high-tech piece of equipment. As mentioned earlier, the professional welding helmet allows continuous work without readjustments.

As a result, sometimes, the welding helmet experiences problems, and they stop working. In this section, we’re going to highlight 7 reasons the auto-darkening welding helmet is not working.

Poor Visibility

Continuous welding work without any break affects visibility. No matter how good a quality you have, there might come a time when you experience poor visibility, and your helmet stops working. Clean your helmet to overcome this problem.

Eye Fatigue

Eye fatigue happens when the helmet fails to turn on the darken mode quickly. Because welders feel pressure on their eyes, they assume that their helmet isn’t working correctly, and they need a new one. However, just by decreasing the reaction time on the helmet, things get back to normal.

Low Battery

When the battery time is completed or when the battery is low, the welding helmet starts to flicker, ultimately affecting its productivity. If you experience such flickering, replace the batteries.

To know more How to Change the Battery in Welding Helmet 

Isn’t Set Properly

Sometimes welders complain that the helmet becomes loose due to which helmet stops working. There’s nothing much serious about this reason. Put the helmet off and tighten it to avoid the issue.

Broken Lens

Another alarming reason why your welding helmet stopped working is because of the broken lens. Lens damages helmet glass shields so it won’t function at all.

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Narrow Lens

When you use a narrow lens in the helmet, you face utter difficulty viewing your welds. You often try to adjust the lens, but your helmet won’t operate correctly. Thus, always use a wider lens for welding helmets.

Too Dark Weld

Since you use the auto-darkening welding helmet regularly and continuously, it’s possible that it suddenly gets too dark. Darkness caused the welding work to be challenging. However, by buying a helmet of a reliable brand and substituting the powered source, the problem can be resolved.

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6 Important Steps To Test If a Welding Helmet Is Working6 Important Steps To Test If A Welding Helmet Is Working

Well! Before using a professional welding helmets first, make sure it is working correctly. There are six steps to test if a welding helmet is working or not.

The steps are discussed as follow:

Code Check:

Make sure your welding helmet is an original one and bears a security code and the International Safety Equipment Association’s notable safety guidelines. Today, the current standard code is ANSI/ISEA Z87.1-2015. Any helmet without this code is dangerous to use.

Proper Fitting

For welding helmets to operate correctly, it is crucial that it fits you well means it shouldn’t be too loose or tight that starts impacting your vision.

If it is too tight so it might cause discomfort during work, and it is too loose, there’s a great chance of your body parts getting exposed. Wear the helmet and make necessary adjustments before using it.

Sun Test

By looking at the sun, you can test if your welding helmet is working or not. By the end of the test, you can see how your lens adjusts with the light intensity.


Visibility plays an integral role while welding helmet functions. Check if the lenses match the nature of the work and the impact the lens used can have on your eyes.

Eye Strain

When too much light passes through the lens so, it results in eye strain and is a leading cause of why your welding helmet won’t work. If you experience pain in the eyes or blurred vision, then immediately adjust the lens.

Lens Placement and Type

Do check the lens shade range. If they are within the range of 9, then it is for low amperage, and if 13 or higher, then for higher amperage. Also, make sure that the lens is placed in the correct order because it can even damage your eye.

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The Bottom Line

Towards the end, all we can say is that welding helmets are worth investing in. Welders should make an investment in the automatic welding helmets like the auto-darkening welding helmet because it works efficiently and saves you from the dangers of the welding process.

But before you use them, follow the steps mentioned above to test if it and make sure that your welding experience won’t be interrupted.