Lincoln Electric’s VIKING™ auto-darkening helmet line has been updated with two new series of helmets. The 1840 series features a 1.8in viewing area height in a compact DINS-sized lens cartridge and the 2450 series features a 2.4in viewing area height in a U.S. standard 4.5in x 5.25in sized lens cartridge. The 1840 offers externally controlled, continuously variable 9 -13 shade control for swift changes without helmet removal. The 2450 series includes a protected, internal, continuously variable 9 -13 shade control. Thanks to variable sensitivity and variable delay, users can adjust the time needed to bring the helmet from a darkened view back to the light state. Integrated grind control, available on both helmets, fixes the lens shade at 3.5in, allowing the user to wear the helmet as a grinding shield. The 1840 series cartridge offers a TIG amp rating of five amps and incorporates two arc sensors for switching from light to dark. The 2450 series cartridge contains TIG amp ratings of three amps DC and five amps AC; it also features four arc sensors.