Slope-Meter "No. 2 NS" is used to determine "percent of grade" and is calibrated to read from .00 to .12 (0-12%).  The "No. 2NS" aids the operator and speeds work on motor graders, asphalt pavers, wheel ditches, tunneling machines, and other equipment where exacting specifications are required.  The "No. 2NS" is installed at the factory by leading equipment manufacturers. 
Manual and Brochures
Download the Slope Meter Brochure
Download the Slope Meter Instruction Sheet
Download the Slope Meter Slope Conversion Tables