Range: -26 to +26 angular degrees. Engraved and hand painted numerals and hashmarks are extremely durable. Special damping fluid works down to -40 degrees F/-40 degrees C. High-visibility Saturn Yellow tube assembly. 3M brand Very High Bond adhesive foam tape on back for easy mounting. Since 1971, Lev-o-gage has been the industry leader in durable, useful inclinometers and industrial levels. Lev-o-gage helps to improve operator safety by providing valuable information to heavy equipment operators in a variety of industries. These tilt gauges can be used on construction equipment, trucks, cranes, tractors, military vehicles, hospital beds, and everything in-between. So, what is an inclinometer? Inclinometers go by many names: Tilt gauge, angle indicator, tilt indicator, level, level indicator, level gauge, angle gauge, tilt meter, gradiometer, grade indicator, percent slope meter, ball bank indicator, or clinometer and heel gauge (two common terms in the Marine or sailing industry). They all do one important thing: Measure and display incline, usually in angular degrees, percent slope, or grade, which is typically shown as grade-to-1. SUN inclinometers are useful in many industrial settings including Agriculture, Aviation, Boring, Construction, Drilling, Engineering, Government, Medicine, Military, Mining, Roads and Transportation, and even Space Exploration.