Best 2×4 Auto Darkening Welding Lens

Welders view their work from the lens attached to a welding hood. What if the lens becomes dark and you couldn’t see what you are doing? Remember, your eyes are not replaceable, but the lenses are. 

Don’t you think it is better to be safe before anything happens? There is no better option than using the best 2×4 auto-darkening welding lens to be safe. 

An auto-darkening welding lens allows switching from regular view to protective view quickly. It automatically responds to produced light from welding. Then, it adjusts to the required shade within a nanosecond. 

In the protective vision, it protects your eyes from flash, arc, sparks, etc. The lens darkens whenever it spots an arc or optical radiation from sparks. When there is no arc present, the lens remains lighter and works as a normal sunglasses type filter. 

This, in turn, will allow you to see things without having to remove your helmet. Anyway, why 2×4? Because it fits most welding helmets, including pipeliner helmets, pancakes helmets, etc. So then, what is the best 2×4 auto dark lens with a really clear view? 

Preview
LINCOLN ELECTRIC 2x4 C-Series Auto-Darkening Welding Lens Variable Shade 8-13 KP3775-1
ArcOne S240-10 Horizontal Single Auto-Darkening Filter for Welding, 2 x 4", Shade 10
Welding Lens, 2 x 4 in, 10, Auto-Darkening
Lincoln Viking Electric 2X4 C-Series Auto-Darkening Welding Lens Shade 10 KP3778-1
ArcOne T240-10 Tradesman Horizontal Auto-Darkening Filter for Welding Helmets, 2 x 4.25 x 0.2"
Tefuawe Auto Darkening Welding Lens, True Color Blue Technology, Shade 10, 2x4.25 with 2pcs Replacement Outside Cover Lens for Pipeliner Welding Hood
Name
LINCOLN ELECTRIC 2×4 C-Series
ArcOne S240-10 Horizontal Single
Miller Electric 2 x 4 in
Lincoln Viking Electric 2X4 C-Series
ArcOne T240-10 Tradesman Horizontal
Tefuawe Auto Darkening Welding Lens
Lens Size
2×4.25 inches
2x 4.25 inches
2x 4.25 inches
2x 4.25 inches
2x 4.25 inches
2x 4.25 inches
Lens Thickness
0.32 inches
0.2 inches
0.5 inches
0.2 inches
0.2 inches
0.2 inches
Shade range
8-13 (variable)
up to 10
up to 10
fixed 10
shade 10.5
shade 10
Viewing area
3.63 x 1.38 inches
5.25 sq. inches
3.7 x 1.37 inches
-
5.25 inches
3.7 x 1.37 inches
Power supply
Solar cell W/2 CR batteries
Solar-powered
Solar-powered
Solar-powered
Solar-powered
1 Lithium Metal batteries
Weight
3.52 ounces
2.39 ounces
3.2 ounces
3.2 ounces
2.39 ounces
3.2 ounces
Warranty
Two years
Three years
Two years
Two years
Three years
-
Preview
LINCOLN ELECTRIC 2x4 C-Series Auto-Darkening Welding Lens Variable Shade 8-13 KP3775-1
Name
LINCOLN ELECTRIC 2×4 C-Series
Lens Size
2×4.25 inches
Lens Thickness
0.32 inches
Shade range
8-13 (variable)
Viewing area
3.63 x 1.38 inches
Power supply
Solar cell W/2 CR batteries
Weight
3.52 ounces
Warranty
Two years
Check Price
Preview
ArcOne S240-10 Horizontal Single Auto-Darkening Filter for Welding, 2 x 4", Shade 10
Name
ArcOne S240-10 Horizontal Single
Lens Size
2x 4.25 inches
Lens Thickness
0.2 inches
Shade range
up to 10
Viewing area
5.25 sq. inches
Power supply
Solar-powered
Weight
2.39 ounces
Warranty
Three years
Check Price
Preview
Welding Lens, 2 x 4 in, 10, Auto-Darkening
Name
Miller Electric 2 x 4 in
Lens Size
2x 4.25 inches
Lens Thickness
0.5 inches
Shade range
up to 10
Viewing area
3.7 x 1.37 inches
Power supply
Solar-powered
Weight
3.2 ounces
Warranty
Two years
Check Price
Preview
Lincoln Viking Electric 2X4 C-Series Auto-Darkening Welding Lens Shade 10 KP3778-1
Name
Lincoln Viking Electric 2X4 C-Series
Lens Size
2x 4.25 inches
Lens Thickness
0.2 inches
Shade range
fixed 10
Viewing area
-
Power supply
Solar-powered
Weight
3.2 ounces
Warranty
Two years
Check Price
Preview
ArcOne T240-10 Tradesman Horizontal Auto-Darkening Filter for Welding Helmets, 2 x 4.25 x 0.2"
Name
ArcOne T240-10 Tradesman Horizontal
Lens Size
2x 4.25 inches
Lens Thickness
0.2 inches
Shade range
shade 10.5
Viewing area
5.25 inches
Power supply
Solar-powered
Weight
2.39 ounces
Warranty
Three years
Check Price
Preview
Tefuawe Auto Darkening Welding Lens, True Color Blue Technology, Shade 10, 2x4.25 with 2pcs Replacement Outside Cover Lens for Pipeliner Welding Hood
Name
Tefuawe Auto Darkening Welding Lens
Lens Size
2x 4.25 inches
Lens Thickness
0.2 inches
Shade range
shade 10
Viewing area
3.7 x 1.37 inches
Power supply
1 Lithium Metal batteries
Weight
3.2 ounces
Warranty
-
Check Price

Auto Darkening Lens vs. Passive Welding Lens

The auto-darkening lens gets dark as soon as it detects light and turns clear when there is no light. A passive lens, on the other hand, is made of colored glass (mostly green), and it doesn’t color at all. 

Undoubtedly, the auto-darkening lens is more convenient to use. You don’t need to take off your helmet to see what you are doing. However, a passive lens forces you to do just that. 

A passive lens is usually optically clearer, and it gives you better vision while torching. It is much cheaper than an auto-darkening lens. so that you can replace it easily. If you often do soldering, a passive lens is just fine for you. 

Some people work with various styles on a variety of materials. Even those people who enjoy messing around working on different materials with different techniques benefit from an auto-darkening lens. 

Different Elements of Auto-Darkening Welding Lens

Different Elements of Auto-Darkening Welding Lens

The auto-darkening lens uses advanced auto-darkening technology. It consists of different elements that work together to give you the best view from welding. Let’s explain each element briefly.

  • The UV/IR Interference Filter

The UV/IR filter comprises a thin glass substrate with a lot of metallic layers. These metallic layers consist of 5 silver layers and six aluminum-oxide layers. Also, it absorbs 99.99% of the IR radiation within the shade range of the auto-darkening lens. Whether the lens is activated or not, the UV/IR filter removes a high radiation level. 

  • Polarization Filters

A polarization filter is used in conjunction to darken the visible light. As you can see, the two polarizes at the right are organized in the same orientation. When you see through these polarizers, they’ll only darken the light a little. 

Conversely, the polarizer close to the UV filter is arranged at 90o compared to others. When looking through it, they are at their darkest. Depending on which way you move, they will get lighter or darken.

  • LC (Liquid Crystal) Cell

LC Cells can turn the light. When the cells are lying flat, they can twist the light by 90o. If these are stimulated by electricity, you can control the light to the point where it doesn’t refract. 

Best 2×4 Auto Dark Lens Reviews: Our Top Picks

The welding lens is crucial protective equipment for any welding job. You can do all the welding and metal works by yourself when you have the best welding lens. Here we assembled a list of the best 2×4 auto-darkening welding lens. 

These auto-darkening lenses are designed to suit the amount of light you get. When you work in a bright condition, these lenses will control the brightness to help you see through. 

LINCOLN ELECTRIC 2×4 C-Series Auto-Darkening Welding Lens

LINCOLN ELECTRIC 2x4 C-Series Auto-Darkening Welding Lens

Lincoln Electric 2×4 C-series is an auto-darkening lens having a shade darker than 10. Designed with world-renowned 4C lens technology, it offers a crystal clear view of the arc and puddle. 

The 4C technology removes imperfections and color saturation for a clearer view. It has an exclusive LC cell that extends the color range and types. So, you can see any color in both light and dark states. 

Moreover, the lens allows changing shades ranging from 8-13 based on amperage changes. There is changeable sensitivity for better lens performance based on application. You can also use shade three light state for inspection work in welding. 

LINCOLN ELECTRIC 2x4 C-Series Auto-Darkening Welding Lens Variable Shade 8-13 KP3775-1

Specification:

  • Model: Lincoln Electric C-series
  • Lens Size: 2×4.25 inches
  • Lens thickness: 0.32 inches
  • Shade range: 8-13 (variable)
  • Viewing Area: 3.63 x 1.38 inches
  • Power supply: Solar cell With 2 CR batteries
  • Weight: 3.52 ounces
  • Warranty: 2 years
Sale
LINCOLN ELECTRIC 2x4 C-Series Auto-Darkening Welding Lens Variable Shade 8-13 KP3775-1
  • World renowned lens technology provides crystal clear view of the arc and puddle
  • The exclusive Liquid crystal lens broadens the color RANGE & hues which can be seen in both light and dark States
  • Eliminates Color saturation for a true Color view
  • Reduces eye strain for all day comfort
  • High quality and consistent performance which minimizes blurriness and distortion

Pros

  • Crystal clear view
  • Variable shade range
  • Extended color range and hues
  • Sensitivity control adjustments
  • Eliminates color saturation
  • Reduced eye strain
  • Lightweight yet durable

Cons

  • It needs additional batteries
  • Somewhat thicker

Final Verdict

Lincoln Electric C-series is genuinely remarkable in performance. It offers a crystal clear view of your welding site. You can see both the arc and puddle without straining your eyes. 

ArcOne S240-10 Horizontal Single Auto-Darkening lens

ArcOne S240-10 Horizontal Single Auto-Darkening lens

The massive amount of clear definition is the main attraction of the ArcOne S240-10 auto-darkening lens. It looks so clear through the lens that you would think like wearing nothing. Thus, you can weld any materials with complete accuracy.

This auto-darkening lens is resistant to dust and water. So no weather element will hinder your work. Besides, it goes from the dark state to the light condition in just 0.5 milliseconds. The lens uses two sensors that operate individually. 

These sensors decide when and to what degree the change is needed. Last, of all, you will have a wide and clear view of your working space. 

Specification:

  • Model: ArcOne S240-10
  • Lens size: 2x 4.25 inches
  • Lens thickness: 0.2 inches
  • Shade range: up to 10
  • Viewing Area: 5.25 sq. inches
  • Switching speed: 0.5 milliseconds
  • Power supply: Solar powered
  • Weight: 2.39 ounces
  • Warranty: 3 years
ArcOne S240-10 Horizontal Single Auto-Darkening Filter for Welding, 2 x 4", Shade 10
  • Two independent sensors, High Definition clear view technology
  • 5.25 square inches of active viewing area
  • Switching speed of 0.5 milliseconds
  • Water and dust resistant
  • Dark to light state delay of 0.2 seconds

Pros

  • It includes ten economical shades
  • High definition, clear view
  • Extra-large viewing area
  • Two independent sensors for optimum eye protection
  • Dust and water-resistant
  • Excellent clarity offer accurate welding
  • Lightweight

Cons

  • The lens may easily get scratched
  • Snug fit

Final Verdict

Overall, ArcOne S240-10 is economical, durable, and excellent for protecting your eyesight. It is suitable for 50-300 amps of MIG, TIG, and Stick application.

Miller Electric 2 x 4 in Auto-Darkening Welding Lens

Miller Electric 2 x 4 in Auto-Darkening Welding Lens

Miller Electric- it’s a reliable name in the field of welding. Like their other products, the Miller Electric 2×4 auto-darkening lens also comes with excellent quality and performance. It features enhanced clarity to make your weld view better and clear.

Neck and eye strain are the major complaints that come from the welder. Thankfully, this lens offers a wide and clear view. Thus, it reduces the suffering of eye and neck strain. There are two independent sensors in the lens.

These sensors darken the lens to the fullest extent when needed. It takes less time for the transaction between light and darkening. Also, it includes built-in auto on/off circuitry. So you can weld continuously without needing to make any changes. 

Specification:

  • Model: Miller Electric 2×4
  • Lens size: 2x 4.25 inches
  • Lens thickness: 0.5 inches
  • Shade range: up to 10
  • Viewing Area: 3.7 x 1.37 inches
  • Switching speed: 1/3 – 600 sec.
  • Power supply: Solar powered
  • Weight: 3.2 ounces
  • Warranty: 2 years
Welding Lens, 2 x 4 in, 10, Auto-Darkening
  • Plate size: 2" x 4"
  • Characteristics: Shade 10
  • Standards: ANSI/CSA

Pros

  • Enhanced clarity
  • The large viewing area for a better view
  • Three light state shade included
  • Two independent arc sensors
  • Auto on/off for safety
  • Affordable

Cons

  • Not suitable for industrial use

Final Verdict

Miller Electric is an excellent replacement for your auto-darkening lens and fits most welding helmet models. We have done a miller 2×4 auto darkening lens review and found it best for light welding jobs. 

Lincoln Viking Electric 2X4 C-Series Auto-Darkening Welding Lens

Lincoln Viking Electric 2X4 C-Series Auto-Darkening Welding Lens

Lincoln Viking is designed with modern SuperVisibility World-renowned 4C lens technology. It gives you a crystal clear view of base materials, arc, and puddle. The lens reduces eye strain so that you can weld the whole day with great comfort. 

However, it’s a liquid crystal lens that extends the color range, which you can see in light and dark states. The lens eliminates color saturation for the original color view. When wearing the Lincoln Viking lens, there is no space for blurriness and distortion. 

The lens is compatible with most pancake-style and pipeline helmets. Its fixed shade ten dark state makes it usable for low to medium amperage welding jobs. Also, there is a shade 3light state for inspection and setup.

Specification:

  • Model: Lincoln Viking Electric 2×4 C-series
  • Lens size: 2x 4.25 inches
  • Lens thickness: 0.2 inches
  • Shade range: fixed 10
  • Power supply: Solar powered
  • Weight: 3.2 ounces
  • Warranty: 2 years
Lincoln Viking Electric 2X4 C-Series Auto-Darkening Welding Lens Shade 10 KP3778-1
  • 4C Lens Technology eliminates imperfections and color saturation to create a clear view of the base material, arc & puddle while reducing eye strain.
  • Fixed shade 10 dark state for low to medium amperage welding applications
  • Shade 3 light state for setup or inspection work
  • Compatible with most helmets which accept 2" x 4. 25" cartridges
  • Hassle free 2 year

Pros

  • Crystal clear view
  • Eliminates color saturation
  • Reduce eye strain
  • Minimizes blurriness and distortion
  • Great compatibility 
  • Durable

Cons

  • Not perfect for TIG
  • Somewhat bright for a shade ten dark lens

Final Verdict

The Lincoln Viking Electric is the best fixed shade welding lens you can get. With the world-renowned technology, it offers an HD view of the arc and puddle. 

ArcOne T240-10 Tradesman Horizontal Auto-Darkening Lens

ArcOne T240-10 Tradesman Horizontal Auto-Darkening Lens

The next one is a best seller auto-darkening lens from the ArcOne brand. Also, it’s an economical filter that fits a majority of welding hoods. The lens probably has the largest viewing area of 5.25-inches. 

Therefore, it doesn’t compromise with your viewing and ensures excellent welding. Two independent sensors detect the bright lights and darken the lens accordingly. 

Here the dark state is rated at 10.5 while the light state is rated at 3. There is no need to remove your helmet as the lens quickly responds to the lights. Above all, it comes with a great hue-yellow with some green.

Specification:

  • Model: ArcOne T240-10
  • Lens size: 2x 4.25 inches
  • Lens thickness: 0.2 inches
  • Shade range: shade 10.5
  • Viewing area: 5.25 inches
  • Power supply: Solar powered
  • Weight: 2.39 ounces
  • Warranty: 3 years
ArcOne T240-10 Tradesman Horizontal Auto-Darkening Filter for Welding Helmets, 2 x 4.25 x 0.2"
  • Light state 3, Dark state 10.5
  • Two independent sensors
  • Economical, general use filter
  • Dimensions 2-Inch x 4-1/4-Inch x .2-Inch
  • Viewing Area 5.25-Inch

Pros

  • Compatible with most welding helmets
  • Better eye protection 
  • Fast and accurate response
  • Lightweight
  • Clear HD view
  • Easy to wear

Cons

  • Snug fit may be uncomfortable to wear

Final Verdict

ArcOne T240-10 can be an ideal lens for DIY welders and beginners who are just learning. The lens is accurate, fast, and consistent. You’ll get excellent color and clarity through it.

Tefuawe Auto Darkening Welding Lens

Tefuawe Auto Darkening Welding Lens

With the Tufuawe auto-darkening lens, you could clearly see what’s going on in the weld. There is no need to take off the helmet when adjusting the angle or speed of welding. Also, the lens offers more accurate results with real 1/1/1/2 optics. 

The lens offers an ultra-clear view even when you are not welding. Then, you get high definition clarity in welding to see a clearer puddle and light blue tint. The lens has higher sensitivity and faster switching time than others.

Specification:

  • Model: Tufuawe
  • Lens size: 2x 4.25 inches
  • Lens thickness: 0.2 inches
  • Shade range: shade 10
  • Viewing Area: 3.7 x 1.37 inches
  • Switching speed: 0.15ms.
  • Power supply: 1 Lithium Metal batteries
  • Weight: 3.2 ounces
Tefuawe Auto Darkening Welding Lens, True Color Blue Technology, Shade 10, 2x4.25 with 2pcs Replacement Outside Cover Lens for Pipeliner Welding Hood
  • Ultra clear view when not in welding. No need to remove your hood to check welding results.
  • High definition clarity in welding, see clearer weld puddle. Light blue tint in welding, no more dark green, decrease your eyes strain.
  • Sensitivity is bit higher and faster switching time 0.15ms. So it reacts quicker and works better in different welding applications. Note: It's normal to darken sometimes when the lens is pointed at the regular light. It won't work or keeps flickering in very low or high amps TIG.
  • Fit most 2-Inch x 4-1/4-Inch welding hood. When installing please do not press hard on the retainer to fix lens position, it could cause inner parts darken after welding a while or other damages.
  • 100% money guarantee. If there is any quality problems with our lens, please don’t hesitate to contact us to ask your money back or new replacement, we will provide you the most satisfactory reply within 24 hours.

Pros

  • Ultra-clear view and high definition
  • Higher sensitivity 
  • Faster switching time
  • Decrease eye strain
  • Accurate welding results

Cons

  • It doesn’t work in low or high amps TIG

Final Verdict

The Tufuawe auto-darkening lens works in various welding applications, including MIG, MMA, TIG, etc. It is darkening quicker and much clear than most lenses. However, it may not work in very low or high amps TIG. 

Techniweld Seer Solar Auto Welding Lens

Techniweld Seer Solar Auto Welding Lens

The next, Techniweld Seer auto-darkening lens, comes with enhanced clarity and definition. It comes with variable shade including 9, 10, 11, 12, and shade three off. However, the lens is designed with clear blue technology for incredible clarity.

You would see everything through the lens without eye strain and neck fatigue. Two independent arc sensors change the color depending on the light state. Then, the lens has built-in auto-on/off circuitry for added safety. 

Specification:

  • Model: Techniweld Seer
  • Lens size: 2x 4.25 inches
  • Lens thickness: 0.197 inches
  • Shade range: 9, 10, 11, 12 and shade three off
  • Viewing Area: 3.62 x 1.42 inches
  • Switching speed: 3/50000 sec.
  • Power supply: Solar cell and LI-ON batteries
  • Weight: 1.27 ounces
  • Warranty: 1 year
Techniweld Seer Solar Auto Welding Lens 2x4 Shades 9, 10, 11, or 12 Shade 3 Off (Shade 12) - ASPSEER2X4H12EA
  • Techniweld Solar auto welding lens 2x4 shades available 9, 10, 11, or 12 shade 3 Off
  • Clear blue technology, incredible clarity - see what you have never seen before!
  • Enhanced definition, reduced eye and neck fatigue
  • 2 independent arc sensors - auto on/off circuitry - eqc quick change - inner and outer lenses included

Pros

  • Variable shades 
  • Designed with clear blue technology
  • Incredible clarity with enhanced definition
  • Quick changing time

Cons

  • Limited one year warranty

Final Verdict

The best part of the Techniweld Seer lens is that it comes at an extremely low price. It is worth buying the lens for everyday welding jobs. 

2 EACH Shade 11 Glass GOLD 2″ x 4.25″ Welding Hood Lens

2 EACH Shade 11 Glass GOLD 2" x 4.25" Welding Hood Lens

The 2 EACH shade 11 is possibly the best gold welding lens you can get from TX supply. It fits almost all 2×4 inches welding helmets and goggles. Also, it’s a durable lens you can get at an affordable price.

The lens is excellent in terms of clarity and color. Besides, it features shade 11, which is best for arc welding. The color of the arc appears as a pale blue color through the lens. 

Specification:

  • Model: 2 EACH shade 11
  • Lens size: 2x 4.25 inches
  • Shade range: shade 11
  • Power supply: Solar cell and LI-ON batteries
  • Weight: 3.2 ounces
2 EACH Shade 11 Glass GOLD 2" x 4.25" Welding Hood Lens Helmet Filter 2 x 4-1/4 Replacement
  • 2 EACH
  • Shade 11 GLASS Gold Filter Plate
  • 2" x 4.25" (51mm x 108mm)
  • Fits all welding helmets and goggles that accept this size

Pros

  • Great value for the money
  • Enhanced view
  • Better clarity
  • Affordable price

Cons

  • Not proper blue but clear

Final Verdict

The 2 EACH shade 11 is a great option as a replacement filter in welding hoods and helmets. Since the price is too low, you can give it a try.

AmeriArc 2×4 Auto-Darkening Welding Lens

AmeriArc 2x4 Auto-Darkening Welding Lens

AmeriArc 2×4 welding lens is one of the clearest lenses available in the market. The arc and puddle visible through the lens look cool bluish tint. Do you know what makes this lens different from others?

The fact is that professional welders design the lens. If you are looking to have an HD clear view, you must get this lens. Not only it offers an extended view of work, but also the view will be crystal clear.

Moreover, the lens is solar-powered, so there is no hassle for charging. The lens comes with variable shades ranging from 5-13. 

Specification:

  • Model: AmeriArc 2×4
  • Lens size: 2x 4 inches
  • Lens thickness: 0.1 inches
  • Shade range: shade 5-13
  • Power supply: battery powered
  • Weight: 2.39 ounces
2x4 Auto-Darkening Welding Lens Variable shade 5-13
  • Variable Shade 5-13
  • Cool blue tint
  • No! orange or green tones

Pros

  • Clear HD view
  • Variable shades
  • Affordable than others
  • It fits most welding hoods and helmets
  • An excellent option for beginners

Cons

  • It tends to flash during high amps welding

Final Verdict

One of the notable points of buying the AmeriArc 2×4 welding lens is that it is quite cheap. It fits most welding helmets. Last of all, it’s an excellent lens for beginners.

ArcOne SS240 Super Singles 240 Auto-Darkening Filter

ArcOne SS240 Super Singles 240 Auto-Darkening Filter

ArcOne SS240 is specially designed for high-powered TIG welding. It is best known for outstanding clarity, sensitivity, and delay. These features are usually available in expensive lenses, but you get them without breaking the bank.

The lens features two independent sensors for added eye protection. It also ensures HD view with a clearer vision to the welder. Besides, the lens is water and dust-resistant.

However, the lens comes with a single dark state of 10.5 and a light state of 2.5. It changes from dark to light in just 0.2 sec and light to dark in 0.5 milliseconds. The lens doesn’t need any additional batteries as it is solar-powered.

Specification:

  • Model: ArcOne SS240
  • Lens size: 2x 4.25 inches
  • Lens thickness: 0.25 inches
  • Shade range: shade 10.5
  • Viewing area: 5.25 inches
  • Switching speed: 0.5 milliseconds.
  • Power supply: Solar powered
  • Weight: 2.39 ounces
  • Warranty: 3 years
ArcOne SS240 Super Singles 240 Auto-Darkening Filter 2 x 4.25 x 0.25"
  • Two independent sensors
  • 5.25 Square inches of active viewing area
  • Switching speed of 0.5 milliseconds
  • Water and dust resistant
  • Dark to light state delay of 0.1 and 2 seconds

Pros

  • Faster switching time
  • Wide and clearer view
  • Provides better eye protection
  • Durable

Cons

  • Shade 10.5 may be dark for some work

Final Verdict

The ArcOne SS240 is one of the clearest lenses due to its high definition. You’ll get to see everything clear whenever you struck an arc.

How Does Auto-Darkening Lens Work?

Earlier, we discussed different elements used in an auto-darkening lens. There you can see the two polarizing filters (close to the eye) are organized in the same alignment. 

When the ADL is switched off, the LC cells in between polarizing filters will twist the light by 90o. It means that the lens will be dark (shade 5-6) when the lens is switched off. In case of ADL failure, your eye will be protected from too bright light. 

When the lens is switched on, the LC cells between two polarizes untwist the light waves.  Then, the lens shade drops down to shade-3 before there is an arc. As soon as you hit an arc, the photosensors in the ADL activate the front LC cell. 

The sensor will detect the light and again darkens the light to the predetermined fixed-shade level. Note that if the lens doesn’t drop down to shade-3, there must be no problem with it. So you shouldn’t continue welding in that case. 

Things to Consider before Choosing the Best 2×4 Auto Darkening Welding lens

Auto-darkening lenses have become the norm and are known as a better choice than others. But what quality features should be in the best welding lens? Before you buy the best auto darkening welding lens, there are a few features to familiarize yourself with. Take a look.

Lens Size

You need a welding lens of the right size to fit your welding helmet in the first place. Note that a good-sized lens offers the best view. 2-inchx4.25-inch is the standard size welding lens you can get. It fits most welding helmets and face shields. 

Lens Shade or Color – fixed or variable?

The best welding lens color or shade is listed as a number. A shade 3or 4 may be easy to see through, but they offer less protection to the eyes. For welding purposes, it is better to choose lens shades from 10 to 13. 

While welding, you can choose the shade by considering the level of amperage. The higher the amperage level, the darker the lens will be. Most auto-darkening lenses come with a fixed shade of 10.

The best fixed shade welding lens offers the same level of protection regardless of the change in amps. If you often work fixed thickness at fixed amperage, you can opt for a fixed shade lens. 

However, having a variable shade option is best for heavy-duty industrial jobs. 

Reaction Time

Reaction time denotes the time it takes to recognize the arc and change the color. An auto-darkening lens takes times less than a microsecond to change from light to dark. A quality lens darkens within milliseconds before your eyes can sense the arc.  

You can choose a less expensive lens for light welding jobs with a reaction time rated at 1/3600. If you spend quite some time in a day, those lenses may cause eye strain and fatigue. In that case, a lens with 1/20000 of a second will keep your eyes comfortable.

Power Sources

An auto-darkening welding lens operates with various power options. Some lenses get power from replaceable lithium or AAA batteries. Then, some lenses work with solar panels. 

Lithium batteries usually offer extended battery life. But, they are more costly and quite hard to find than AAA batteries. If your working place has enough solar sources, you can opt for solar units. You need to put those lenses into direct sunlight before use. 

Lens Clarity

Lens clarity determines how well you see through the lens. Along with the viewing capacity, your vision also depends on lens clarity. As specified by the EN379 standard, the lens should have a clarity rating of 1/1/1/1. 

Comfort

The comfort you get from a lightweight lens. Wearing a heavier lens might not feel bad at the beginning, but later it will make you suffer. The heavier lens does nothing but adds weight to your helmet and makes you uncomfortable. 

Number of Sensors

An auto-darkening lens should have 2-4 arc sensors to sense lights. Having an arc sensor makes sure you do not get flashed. In welding lenses, more sensors mean safer. When you weld out of position, a two-sensor lens may fail to sense it. But, a four arc sensor lens is likely to sense any flash and darken it accordingly.

Adjustable Delay and Sensitivity Controls

Having adjustable sensitivity controls in the lens helps you choose the level of brightness. So, the lens must detect the brightness level before it darkens. It is essential to have when other welders are working nearby. 

Without adjustable sensitivity controls, their arc will tend to trigger your helmet’s response. Moreover, it is also essential to be able to adjust the delay. It allows adjusting the time the lens will stay dark after the arc stops. 

For tack welding, a shorter delay time is enough as you can reposition the welder quickly. But, a longer delay is preferable for high-amperage welding. This time is required to allow the puddle to cool.

FAQs

Why are welding lenses green?

When you look through the welding lens, you may see all green. Why does it happen? Usually, the light from a welding arc includes IR, UV rays, and visible light. As you know, UV and IR can cause damage to your eyes.

In an auto-darkening lens, there is a UV/IR filter that blocks UV/IR light. It means only visible lights pass through the welding lens where green light dominates other colors.

However, the lens blocks the blue and red ends of the light. That’s why; anything through welding lenses appears green.

What is the darkest welding lens?

When a welding arc is struck, the filter in the welding lens becomes dark. How dark the lens will be, is determined by the shades in the lens. Generally, standard shades in a lens are 8-13, where #13-shade is the darkest one.

What is the best auto darkening welding lens?

The best auto dark lens is the one that doesn't let you remove your helmet while welding. It will darken when it detects something as bright as a weld but remains lighter for grinding jobs. The market’s best lenses are Miller Electric 2x4 auto-darkening lens, Lincoln auto-darkening lens, and ArcOne T240-10.

What shade is best for stick welding?

The shade number denotes the darkness of a lens. There are several shades recommended for different types of welding. For stick welding, the shade should be 8-12 based on the amperage used.

Type of welding Amperage Lens Shade

Stick welding – mild steel 20-40amps shade 9

Stick welding – mild steel 40-80amps shade 10

Stick welding – mild steel 80-175amps shade 11

What is the lightest welding lens shade recommended for GMA MIG welding?

As a rule of thumb, use shade 10-shade 13 in a welding lens to avoid any damage to your eyes. The higher the number, the darker the lens shades. It also depends on the amperage used. The more amperage used, the darker the lens shades. The lightest shade for GMA MIG welding is shade 8.

 Final Words

So anyway, we are at the end of our guide, and it’s time to say hasta la vista. The welding lens in your helmet is a protection device that you entirely rely on. You believe it will protect your eyes from any flash burn damages. 

Luckily, the best 2×4 auto-darkening welding lens is designed with relatively new technology. It aims to make the welders’ life simpler. So, do you find your desired lens from our extended list? 

All of them are up to date and best suited for any welding job. They ensure more accurate work while reducing the amount of time spent on welding. Note that your eyes are priceless, so make sure you are well prepared.

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