New 1840 and 2450 Helmets Offer Enhanced Features and New Graphic Options. Lincoln Electric has updated its VIKING™ auto-darkening helmet line with two new series of helmets – the 1840 series featuring a 1.8 in. viewing area height in a compact DINS-sized lens cartridge and the 2450 series featuring a 2.4 in. viewing area height in a U.S. standard 4.5 in. x 5.25 in. sized lens cartridge.
The 1840 features externally-controlled continuously variable 9 -13 shade control for quick changes without helmet removal. The 2450 series features a protected internal continuously variable 9 -13 shade control. Variable sensitivity and variable delay allows the user to adjust the time required to bring the helmet from a darkened view back to the light state. Both helmets also include an integrated grind control, which fixes the lens shade at 3.5 in. to allow the user to wear the helmet as a grinding shield.
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