PWHL2 - Inner Cover Lens for PWH 9843 Series Helmets

Product Overview

The Techniweld PWHL2 is a specialized replacement inner lens cover engineered specifically for the PWH 9843 series of welding helmets. In the hierarchy of welding helmet components, the inner lens plays a pivotal role in preserving the integrity of the Auto-Darkening Filter (ADF). While the outer lens defends against high-heat spatter and external impact, the inner lens is the final barrier protecting the delicate liquid crystal display of the ADF from the welder's side.

Technical Construction and Optics

Manufactured from high-grade optical polycarbonate, this lens is designed to transmit light with minimal refraction or distortion. This ensures that the welder receives the true optical clarity rating of their helmet's filter. The material is selected for its balance of impact resistance and optical purity. Although protected from the harsh environment of the weld pool, the inner lens is subject to moisture from breath and sweat, as well as fine particulate matter that may circulate inside the helmet shell. The PWHL2 provides a robust shield against these contaminants, preventing them from settling directly onto the glass surface of the ADF.

Maintenance and Compatibility

Proper maintenance of the optical stack is essential for industrial safety and weld quality. A scratched or dirty inner lens can cause "haloing" around the arc or general blurriness, leading to eye strain and potential errors in torch manipulation. The PWHL2 is precision-cut to fit the retention clips of the PWH 9843 model perfectly, ensuring a seal that prevents dust bypass. It is recommended that this component be inspected daily and replaced immediately upon signs of pitting, deep scratching, or permanent fogging. This proactive maintenance step significantly extends the operational life of the electronic filter unit.