No Liquid Fill
Direct Drive eliminates the need for liquid fill, a primary culprit to the premature failure of C-Tube gauges.
Perma-Cal® gauges have enhanced durability and greater longevity than liquid-filled gauges without the mess or problems of liquid fill. Our gauges do not suffer from any of the problems liquid fill is designed to solve. Because of Direct Drive design, there are no gears, linkages or other internal mechanical components requiring lubrication. Especially in applications experiencing consistent vibration, liquid-filled gauges can begin to leak causing premature failure.
Perma-Cal® gauges are internally dampened with a small application of ultra-high viscosity silicone fluid that eliminates pointer flutter. Our gauges provide greater longevity than liquid-filled gauges without the leaking or discoloring problems of liquid fill.