Slope Meter No 2NS is used to determine "percent of grade" and is calibrated to read from .00 to .12 (0-12%). 

Slopemeter No 1. Used for all slope amd crown construction and is widely used on motor graders, bulldozers, and similar equipment.

The Slope meter Safe Curve Speed Indicator (SCSI). The safe driving speed for any curve is quickly and accurately determined with the SCSI mounted in the engineer's car.

The Steep Slope Meter (SSM) combines the features of the No. 1 and the No. 2NS and works well on bulldozers and similar equipment.