ShadeTronic® technology is the foundation of the OPTREL e684 mask’s advanced eye protection. It operates over a wide range of shade levels from 5 to 13, intelligently and smoothly adjusting to the current intensity of the light emitted by the welding arc. For the professional welder, this means eliminating the need to manually change the settings, which not only makes the work safer by allowing continuous focus on the weld pool, but also significantly increases efficiency. The ShadeTronic® system uses an additional, high-precision brightness sensor that constantly monitors the environment and responds instantly to any fluctuations in arc light intensity. Despite this advanced automation, the e684 mask also offers the option to switch to manual mode, where the welder can independently adjust the shade level in two dedicated ranges: from 5 to 9 and from 9 to 13. This option provides full control over eye protection, allowing the mask to be tailored to the specific requirements of the welding task, type of material or preferred technique. For less experienced users, automatic shade adjustment is a huge convenience, as the mask itself takes care of the right level of eye protection in any situation, without the need to think about the right settings.

stands out in the welding market thanks to its innovative Ultra-HD lens, which guarantees exceptional optical quality. Unlike traditional masks, which often distort colors and offer an image in shades of green, the e684 is equipped with True Color View technology for realistic color reproduction. For the professional welder, this means much better color differentiation of welded materials, which is crucial when working with different metal alloys and allows a more accurate assessment of the characteristics of the weld pool. The result is higher weld quality and aesthetics. The optical quality of the mask has been confirmed with the highest class 1/1/1/1 according to the rigorous EN379 standard. This classification includes the evaluation of four key parameters: optical class (accuracy of image reproduction), light scattering (minimization of fogging), uniformity of obscuration (uniform level of protection over the entire surface of the filter) and angular dependence (clarity of vision at different angles). For less advanced users, such high optical quality simply means a very clear and sharp image of the welded area, making work easier and reducing eye fatigue.

Twilight technology, also known as FadeTronic®, is a unique feature of the OPTREL e684 mask that significantly improves welder comfort. At the end of the welding process, instead of suddenly returning to bright mode, the mask uses patented technology to gradually brighten the field of vision. For the professional welder, this means a reduction in visual fatigue, which is often caused by sudden changes in light intensity. The delay time for this smooth transition is adjustable from 0.1 to 2.0 seconds, allowing the welder to fine-tune this feature to his individual preferences and the specifics of the job. The ability to extend the brightening time can be particularly useful for spot welding or short cycles, providing a more natural and less tiring visual experience. For amateurs, the Twilight function simply means a smoother transition from darkness to brightness after welding, which is much more pleasing to the eyes and reduces the feeling of “glare” after welding.

is equipped with a dedicated grinding mode that can be easily activated with an external button. When switched to this mode, the blackout level is set to a value of 4, ensuring a clear and distinct view when performing grinding work. For the professional welder, this eliminates the need to change the mask for a separate grinding visor, which significantly saves time and increases convenience, especially in situations where welding and grinding are done alternately. Grinding mode also prevents accidental darkening of the filter, which could be a hazard when working with a grinder. For less experienced users, the grinding mode is a simple and safe solution that allows them to perform preparatory work without the need for additional eye protection.

professional welders working in environments with high concentrations of harmful substances, the OPTREL e684 mask offers full compatibility with OPTREL’s advanced PAPR (Powered Air Purifying Respirator) respiratory protection systems, such as the e3000x and swiss air PAPR. These systems provide reliable and certified respiratory protection against hazardous welding smoke, harmful aerosols and fine dust, thanks to integrated particulate filters of the highest TH3 class. For welders, this means a significant reduction in the risk of occupation-related respiratory diseases. OPTREL’s PAPR systems provide a constant supply of clean, filtered air under the mask, which further increases comfort, especially during prolonged welding sessions. For amateurs who occasionally perform welding work, the ability to connect a PAPR system can provide additional health protection when working in less ventilated areas.

offers a wide range of advanced settings that allow the professional welder to optimally adjust it to individual needs and preferences. Adjusting the sensitivity of the welding arc sensors allows the mask’s response to be fine-tuned for different welding methods (MIG/MAG, TIG, MMA) and different ambient lighting conditions. In addition, it is possible to adjust the angle of arc detection (60° or 120°), which is particularly useful in environments where multiple welders are working, minimizing the risk of unwanted dimming of the mask by arcs from neighboring stations. The mask also features a special Overhead Welding Feature, which is designed for comfort and safety when working in this specific position. For less experienced users, these personalization options may seem advanced, but they give you the opportunity to customize the mask and experiment with different settings to find the most comfortable and effective ones.