The sender is magnetically driven with variable resistance, with two plotted lead wires and weather proof cable-end connectors. This 2-wire TwinSite sender employs a laser trimmed, advanced matrix resistance element. Thick film resistance element provides continuous and more reliable signals with less noise. Plastic case is sealed hermetically by ultrasonic heating to melt and fuse the case into one solid piece. This keeps weather out, ensures "no-fog" readability, and greatly extending mechanical life. Case withstands vibration and shock that would render comparable metal designs useless. Case is far more resistant to corrosion than any metal cased version. The plastic lens (and the rest of the case) is a special UV stabilized material.
