Sensitivity can be adjusted to suit the task
January 1st 2004

Two new auto-darkening welding filters from Hrnell offer increased flexibility for welders who use a variety of amperages and welding methods. A newly developed electronics unit enables adjustment of the filters sensitivity (the switching of the lens from light to dark) and delay (switching back to the light shade after welding stops). The welding filters optical density the degree of light that penetrates the filter can be adjusted too. All three adjustments are made by pressing individual control buttons, allowing for a wide range of setting combinations that precisely match a specific users preference for any given welding application. The new filters are compatible with all existing Speedglas 9000 welding helmets and replace the 9000V, 9000X and 9000Xi filters. The companys 9000XF, 9000F and Utility will continue to be offered, but only the variable shade 9002V and 9002X filters will have the new sensitivity and delay features. The new speedglas 9002V and 9002X have four user-selectable levels of sensor sensitivity, allowing the welder to adjust to changing work requirements. For example, when closely surrounded by other welders, the user might want to lower the sensitivity to keep the filter in the light state prior to him striking an arc. On the other hand, if the user is working by himself using very low-amp tig, he might want to increase the sensitivity of the filter. The sensitivity control excels in applications where the arc is partially obscured by pipes, tubes or the welders hands.