Abney Level Measures Slope Values by Arc and Grade
The Deluxe Abney Level also features a 5-1/8"L tube and 1-1/8" radius arcs graduated 0–90º in both directions with vernier readings to 10 minutes and 1:1 to 1:10 slope scales. Deluxe model adds a percent-of-grade scale from 0-100º. Includes belt-loop Cordura® case.