Supplied Air Shield and Welding Helmet Replacement Variable Shade Lens Kit Allegro 9904-36. This variable shade lens kit was made for all types of welding processes such as TIG and TIG pulsing. This lens kit featurs both optical as well as magnetic arc detection system to ensure that the filter will not open if the sensors become blocked. It is solar powered with dual sensors. Active viewing 1.6" x 3.8"
Replacement Variable Shade 9-12 Auto Darkening Lens Kit (for use with 9904-WB Deluxe Supplied Air Shield and Welding Helmet) Blue Shield
Made for all welding processes including TIG and TIG pulsing. Lens features both optical and magnetic arc detection system, ensuring the filter will not open (turn from dark to light) even if the sensors become blocked. Designed with the capability to detect light and magnetic waves that occur during welding. Optomagnetic sensors can be adjusted from 0 to 6 feet in range. It is solar powered with dual sensors. Kit includes auto-darkening welding filter and mounting frame.
The active viewing area: 1.6" x 3.8" (4.06 cm x 9.65 cm)