inclinometer
instrument used to measure the inclination of a surface relative to local gravity
astrolabe
astronomical instrument in the form of a disc or sphere with wires, cutouts or perforations that allows a user to calculate astronomical positions precisely
Topographic Abney Level
surveying instrument
geologic compass
compass that measures azimuth and inclination in one operation
level
any instrument designed to indicate whether a surface is horizontal (level) or vertical (plumb)