QuadGrade Sonic Tracker

A brief introduction to the QuadGrade Sonic Tracker. The Sonic Tracker is a very versatile and economic solution for tasks that require constant cross fall on undulating terrain, such as curb & gutter, side walks, driveways etc.
It is a plug and play solution that uses the same coiled cables as the QuadGrade laser receivers. It can trace a string line, concrete form work, or grade match an existing surface.
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