Næxon

Classic 2×4 welding lens dimensions. Modern auto-darkening technology. Built for pancake and pipeliner welding hoods.

The Næxon 2×4 R-Series R682 Fixed Shade Auto-Darkening Welding Lens brings modern auto-darkening performance to the classic hood styles trusted by pipeline welders, pipe welders, and industrial craftsmen.

Designed for compatibility with most 2×4 pancake and pipeliner-style welding hoods, the R682 combines enhanced arc and puddle visibility, true-color viewing technology, dual arc sensors, adjustable sensitivity and delay controls, solar-assisted power, replaceable batteries, and a low-battery indicator in a compact lens platform.

Choose your viewing preference from Gold, Blue, or HD, then select your preferred fixed welding shade:

Shade 9 • Shade 10 • Shade 11 • Shade 12

Each lens also includes two clear polycarbonate protective lenses.

The Classic 2×4 Lens, Rebuilt for Modern Welding

There’s a reason the 2×4 lens format remains popular among pipeline and field welders.

It’s simple.

Compact.

Proven.

And it works with hood designs that welders have trusted for generations.

The Næxon R-Series keeps that familiar format while bringing modern auto-darkening technology behind it.

Strike an arc and the lens automatically transitions into its designated welding shade. Break the arc and the lens returns to its light state.

You keep the hood down and your attention on the weld.

Gold, Blue & HD Lens Options

Every welder sees the puddle differently.

That’s why the Næxon R-Series is available in three viewing options: Gold, Blue, and HD.

GOLD

The Gold R-Series provides a distinctive viewing experience for welders who prefer the visual characteristics of a gold-style lens.

It combines the classic feel associated with gold welding lenses with the convenience and performance of modern auto-darkening technology.

BLUE

The Blue R-Series is designed for welders who prefer a cooler-toned viewing experience when watching the arc and puddle.

It gives the R-Series its own distinctive visual character while maintaining the same focus on clarity, arc recognition, and welding performance.

HD

The HD R-Series focuses on enhanced clarity and natural visual definition of the weld area.

It’s designed for welders who want to see the base material, joint, arc, and puddle with as much useful visual information as possible while welding.

Gold. Blue. HD.

Different viewing preferences.

Same R-Series philosophy.

Fixed Shades 9, 10, 11 & 12

The Næxon R682 is available in four fixed welding shade options:

Shade 9
Shade 10
Shade 11
Shade 12

This allows welders to select the lens shade appropriate for their application and personal viewing preference, subject to the shade requirements for the welding process and amperage being used.

For welders who already know the shade they like, the fixed-shade design keeps the experience straightforward.

Pick your lens.

Pick your shade.

Burn rod.

Enhanced Arc & Puddle Visibility

A welding lens is only as good as what you can see through it.

The R-Series lens technology is designed to reduce excessive color saturation and visual distortion, providing a clearer view of the:

Base material. Joint. Arc. Puddle.

The expanded color and hue visibility in both light and dark states is intended to provide a more natural view compared with traditional heavily saturated welding lenses.

When you’re watching the edge of the puddle and controlling penetration, clarity isn’t a luxury.

It’s part of the work.

True-Color Viewing Technology

Traditional welding lenses can heavily tint the entire welding environment, making it difficult to distinguish details around the arc.

The Næxon R-Series uses advanced liquid-crystal lens technology designed to broaden the range of colors and hues visible through the lens.

That means more visual information from the weld area and less unnecessary color saturation.

The goal is simple:

See the weld—not just the light.

Auto-Darkening Performance

The R682 automatically responds when an arc is detected, eliminating the need to manually flip between clear and dark viewing states during normal operation.

The system uses two arc sensors to provide consistent detection and switching performance.

For pipe welders constantly changing position around a joint, reliable switching matters.

Top.

Side.

Bottom.

Next joint.

The lens is built to follow the work.

Adjustable Sensitivity Control

Different welding environments create different amounts of light.

The R-Series includes sensitivity adjustment, allowing the response of the auto-darkening system to be tailored to the application and working environment.

This can help optimize arc detection depending on the process and surrounding conditions.

Adjustable Delay Control

The R-Series also provides delay control, allowing the welder to customize how the lens transitions after the arc stops.

Different welding applications and working conditions may benefit from different switching behavior.

Instead of forcing every welder into one factory setting, the R-Series gives you control over the response.

Solar-Assisted Power

The Næxon R682 uses solar-assisted technology to help extend battery life by utilizing available light during operation.

The solar system works alongside the lens’s battery power to support long-term use.

For welders burning rod throughout long shifts, every bit of battery efficiency matters.

Replaceable Battery System

When the battery eventually reaches the end of its service life, the entire lens shouldn’t automatically become disposable.

The R-Series incorporates replaceable batteries, helping extend the usable life of the lens cartridge.

A built-in low-battery indicator also provides convenient battery-status awareness so you can address a weak battery before the next important weld.

Dual Arc Sensors

Two arc sensors help provide reliable detection of the welding arc and consistent lens switching.

This is especially valuable in real-world welding positions where the relationship between the lens and arc changes throughout the weld.

The R-Series is designed for the reality of field welding—not just a perfect test position.

Built for Pancake & Pipeliner Hoods

The R682 uses the classic 2×4 lens format and is designed for compatibility with most pipeline and pancake-style welding helmets that accept the corresponding lens size.

That makes the R-Series particularly attractive for pipeline and field welders who want modern auto-darkening performance without abandoning the hood style they already prefer.

Old-school hood. Modern lens.

Includes Two Clear Protective Lenses

Every Næxon R682 includes:

1 × Næxon R-Series R682 Auto-Darkening Welding Lens

2 × Clear Polycarbonate Protective Lenses

The clear protective lenses help protect the auto-darkening cartridge from welding spatter, sparks, debris, and everyday jobsite damage.

Replace protective lenses when they become heavily scratched, damaged, or contaminated enough to interfere with visibility.

Key Features

• Classic 2×4 welding lens format
• R-Series R682 auto-darkening technology
• Available in Gold, Blue, and HD viewing options
• Available in fixed Shades 9, 10, 11, and 12
• Enhanced arc and puddle visibility
• Advanced liquid-crystal lens technology
• Designed to broaden visible colors and hues
• Reduced color saturation for a more natural view
• Designed to minimize blurriness and distortion
• Sensitivity adjustment
• Delay adjustment
• Dual arc sensors
• Solar-assisted power system
• Replaceable batteries
• Low-battery indicator
• Designed to reduce visual fatigue during extended welding sessions
• Compatible with most appropriate pancake and pipeliner-style welding hoods
• Includes two clear polycarbonate protective lenses

Product Specifications

Product: R-Series Fixed Shade Auto-Darkening Welding Lens
Model: R682
Brand: Næxon
Lens Format: 2×4
Lens Options: Gold / Blue / HD
Available Fixed Shades: 9 / 10 / 11 / 12
Arc Sensors: 2
Sensitivity Control: Yes
Delay Control: Yes
Solar Assisted: Yes
Battery: Replaceable
Low-Battery Indicator: Yes
Protective Lenses Included: 2 clear polycarbonate lenses
Compatibility: Most appropriate pancake and pipeliner-style welding hoods accepting this lens format
Primary Application: Welding

Built for Pipe & Pipeline Welders

The R-Series makes particular sense for welders who prefer traditional pipeline hood configurations but want the convenience of auto-darkening technology.

Whether you’re:

• Welding transmission pipeline
• Running pipe in a refinery
• Working a plant shutdown
• Fabricating pipe in the shop
• Welding industrial process piping
• Working structural steel
• Performing field repairs
• Burning rod throughout long shifts

…the objective remains the same:

See the puddle clearly and stay focused on the weld.

Næxon Expert Guide: Why Fixed Shade?

Not every welder wants to adjust their shade every time they put their hood on.

Experienced welders often develop a preferred shade based on the processes, amperages, environments, and welding conditions they encounter most often.

That’s where a fixed-shade auto-darkening lens makes sense.

You retain the convenience of automatic light-to-dark switching while using the dark-state shade you’ve selected.

The R682 gives you four choices:

9. 10. 11. 12.

Choose the shade appropriate for the work and required eye protection.

Then concentrate on welding.

Why Auto-Darkening in a Pancake Hood?

Pancake and pipeliner-style hoods remain popular because of their compact design, simplicity, and suitability for field welding.

Traditional fixed lenses have worked in these hoods for decades.

Auto-darkening adds another layer of convenience.

You can position yourself with the hood down and see the work area before striking the arc. Once the arc starts, the lens automatically transitions to its welding state.

For welders working around pipe where positioning can already be difficult, eliminating unnecessary hood movement can make the workflow more natural.

Clearer Vision During Long Welding Sessions

A welder can spend hours looking through a lens.

Clarity matters.

The R-Series is designed to minimize excessive color saturation, blurriness, and distortion while improving visibility of the base material, arc, and weld puddle.

That enhanced visibility is designed to reduce unnecessary visual strain during extended welding sessions.

Because after ten or twelve hours of welding, small improvements in visibility can matter.

Care & Maintenance

Keep the lens and clear protective covers clean and inspect them before each use.

Replace protective lenses when excessive scratches, spatter, cracks, or contamination interfere with visibility.

Inspect the auto-darkening lens for physical damage before welding.

Check battery condition and pay attention to the low-battery indicator.

Before welding, verify that the lens darkens correctly and that the selected fixed shade provides the protection required for the welding process, amperage, and applicable safety requirements.

Never weld with an auto-darkening lens that is damaged or not operating correctly.

Frequently Asked Questions

What size is the Næxon R682?
It uses the classic 2×4 welding lens format designed for compatible pancake and pipeliner-style welding hoods.

What colors are available?
The R-Series is available in Gold, Blue, and HD viewing options.

What shades are available?
The R682 is available in fixed Shades 9, 10, 11, and 12.

Is this an auto-darkening lens?
Yes. The R682 automatically transitions into its designated welding shade when the sensors detect the welding arc.

Does it have sensitivity adjustment?
Yes. Sensitivity control allows the response of the lens to be adjusted for different welding conditions.

Does it have delay adjustment?
Yes. Delay control allows the switching behavior after the arc stops to be customized.

How many arc sensors does it have?
The R682 uses two arc sensors for consistent arc detection and switching.

Is it solar powered?
It uses solar-assisted technology to help extend battery life.

Can the batteries be replaced?
Yes. The battery system is replaceable, helping extend the overall usable life of the lens.

Does it have a low-battery warning?
Yes. A low-battery indicator provides battery-status awareness.

Does it include protective lenses?
Yes. Two clear polycarbonate protective lenses are included.

Will it fit a pancake hood?
It is designed for compatibility with most appropriate pancake and pipeliner-style hoods that accept the corresponding 2×4 lens format. Always verify the dimensions and compatibility of your specific hood before installation.

Safety Information

Always select a welding shade appropriate for the welding process, amperage, and applicable workplace safety requirements.

Inspect the auto-darkening function before every use and never weld if the lens fails to darken correctly.

Welding lenses are only one component of a complete welding PPE system. Use an appropriate welding hood or helmet, safety glasses, protective clothing, gloves, footwear, and any additional PPE required for the task.

Replace damaged lenses and protective covers before use.

Old-School Hood. Modern Vision.

Pipeline welders have been looking through 2×4 lenses for generations.

The shape doesn’t need reinventing.

What’s behind it does.

The Næxon R-Series R682 takes the classic 2×4 format and brings modern auto-darkening technology, enhanced color visibility, dual arc sensors, sensitivity and delay control, solar-assisted power, replaceable batteries, and three distinctive viewing options into one compact welding lens.

Gold. Blue. HD.

Shade 9. 10. 11. 12.

Pick the view.

Pick the shade.

Drop the hood.

Watch the puddle.

NÆXON — BUILT FOR THE HARDEST WORKERS ON EARTH.