2D Milling Control
Get smoother results
Sonic averaging system
- Select a reference: elevated string line, surface string, poured curbs or existing surfaces
- Easy to attach and position over selection
- Rugged cast housing
- Bright-grade indication LEDs
Improve your averages

This time-tested system delivers ultimate reliability. 2D milling provides smooth results for elevation and slope control by using a sonic averaging system.
Pick a reference
2D milling uses a sonic averaging system (SAS), consisting of multiple sonic trackers in combination with any physical reference. It tracks any existing surface, poured curbs or string line. The average of the sonic trackers is pushed into the control system for smooth results.