Are cheap auto darkening welding helmets safe?

Author: wenzhang1

May. 13, 2024

Things to Consider when Selecting an Auto-Darkening Welding Helmet

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From the intense heat to the flying sparks and bright UV flashes, welding safety gear and personal protective equipment (PPE) are crucial for various construction tasks involving metal joining. Your eyes, face, hands, and body are at risk of welding injuries and hazards. One of the most critical safety devices is a welding helmet. When chosen wisely, all welding helmets offer protection, but selecting an auto-darkening welding helmet instead of a passive one could provide additional benefits in certain situations.

Understanding Auto-Darkening vs. Passive Welding Helmets

The primary difference between auto-darkening and passive welding helmets lies in their complexity. Passive helmets feature a fixed dark lens, typically at shade 10, offering built-in ultraviolet (UV) and infrared (IR) protection. They can be flipped up or down with a nod to inspect the weld and reposition the torch. These helmets are lightweight, easy to use and maintain, and more affordable.

Auto-darkening welding helmets are equipped with special liquid crystal filter lenses powered by rechargeable batteries, solar power, or both. When activated, these helmets detect changes in light and adjust the auto-darkening filter (ADF) shade accordingly. Advanced sensors differentiate between various light sources, ensuring the helmet doesn't react to ambient light or fail to detect the welding arc.

The ideal helmet meets your specific job requirements. Auto-darkening helmets have revolutionized many industries by enhancing work safety and efficiency. Available in numerous options for both hobbyists and professionals, you can find the perfect set of features with the guidance of a safety expert.

Advantages of Auto-Darkening Welding Helmets

One significant advantage of auto-darkening helmets is their efficiency. Unlike passive helmets that require repositioning and adjusting, auto-darkening models eliminate the need to lift the helmet or adjust the torch position constantly. This leads to fewer bad starts, prolonged concentration, and reduced neck strain. Auto-darkening helmets are also suitable for confined spaces with limited room for movement. Some models can handle various tasks simultaneously, eliminating the need to switch gear frequently. Additionally, ADF delay settings typically have minimal issues, significantly reducing the risk of arc flashes. These helmets are excellent for beginner welders due to their user-friendliness and for professionals who can benefit from increased productivity and workflow.

Disadvantages of Auto-Darkening Welding Helmets

With added features comes a higher price. Auto-darkening helmets are generally more expensive than passive ones. Additionally, repairs and replacement parts can be costlier due to the complexities and electronics involved. Another downside is the limited shade options, with available darkness levels often capped at shade 10 during welding and shades 3 or 4 otherwise.

Tips for Choosing Your Auto-Darkening Welding Helmet

When selecting an auto-darkening helmet, consider the numerous available features. Here are some key factors to keep in mind to find the safest and most suitable helmet for you:

Lens reaction time: Ensure your helmet complies with industry standards (ANSI Z87.1 and CSA Z94.3) to protect your eyes, even when the lens isn't darkened. Reaction time influences comfort, with faster or slower times affecting eye strain and fatigue.

Fixed vs. variable shade lenses: Some auto-darkening helmets automatically darken to shade 10, appropriate for some jobs. For diverse welding tasks, consider helmets offering shades 8 to 13 for better adaptability.

Adjustable delay and sensitivity controls: These allow you to set the brightness level that triggers the lens darkening, useful in environments with coworkers or low-amperage tasks. You can also adjust how long the lens remains dark after the arc ends.

Viewing size and number of sensors: Viewing size is a matter of preference. Larger viewing areas offer better peripheral vision and easier positioning but may result in a heavier helmet. Smaller areas provide a focused view. More sensors enhance coverage, especially when you're out of position or blocking a sensor (four sensors are optimal for most jobs).

Power source and control panel positioning: A combination of solar and battery power can extend battery life. Some helmets feature external control panels for easy adjustments without removing the helmet; however, they can be more prone to damage.

Trying out different helmets is the best way to determine the ideal fit for your job and comfort. Start with a shade that may be too dark and gradually move to a lighter one to find a balance between visibility and protection.

No matter your helmet choice, always complement it with additional protective gear. A helmet alone won't protect your entire body from welding hazards. Ensure the outer cover lens remains clear of slag and splatter for optimal visibility.

Welding PPE from PK Safety

With decades in the safety industry, PK Safety's experts personally vet all welding safety equipment and PPE we offer. We only recommend gear we trust to protect ourselves. Protect your eyes with darkening welding helmets to ensure you can perform your tasks safely. Explore our website for valuable information, including blog posts and product descriptions, or contact our Safety Experts online or at 800.829.9580.

SHOP AUTO-DARKENING WELDING HELMETS

Will Using Auto-Darkening Welding Helmets Damage Your Eyes?

This should really be a comment, as I have only partial information and am neither able to conclusively strengthen or refute the claim. However, I can provide some insight into the debate.

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Let's start with the part of the claim that needs specification:

Eventually needs glasses

While it's true that most people eventually need glasses, welding-related eye damage can sometimes be mitigated by wearing glasses in specific scenarios:

a) Arc eye (photo-keratitis) is damage to the cornea, usually reversible but very painful, healing within a few days. Scarring can occur from severe burns, potentially leading to incorrect cornea curvature, which may be corrected by glasses.

b) Cataracts: Long-term UV exposure can cause cataracts, leading to irreversible damage. Cataract surgery often replaces the eye lens with a plastic lens. Before modern lenses, thick glasses were required post-surgery.

c) Visible light (VIS) can cause irreversible retinal damage (thermal or photo damage). Glasses won't help here.

Now for the main claim:

Auto-darkening welding helmets are dangerous

Potential dangers of auto-darkening helmets versus conventional helmets include:

  • Not all harmful radiation is filtered.
  • Reaction time: Automatic helmets have a reaction time of 0.1 ms, significantly faster than natural reflexes but still might expose the eyes briefly. However, the UV filter is always at class 13 protection.

A pubmed search didn't yield useful material. However, the EU's EN379 standard regulates automatic welding filters.

Two definite risks with automatic filters are:

  • Using an incorrect filter class for the welding application, as recommended by German occupational safety (classes 4-15).
  • Battery check is mandatory before starting work; low batteries will disable the LCD function.

Personal experience (limited hobby welding and conventional helmet use):

  • It's easier to flash your eyes with a conventional mask by accidental viewing through a low filter area or delayed nodding. Unfortunately, no safety studies were found, leaving this as anecdotal.
  • I've experienced more flashes from others welding rather than my own accidents, with the latter being more dangerous due to proximity.

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