An inclinometer is a device used to measure the angle of slope or tilt of an object relative to the horizontal plane. It is commonly used in various fields such as civil engineering, geology, and construction to assess the stability of structures, monitor landslides, or evaluate the alignment of equipment. Inclinometers can be mechanical or electronic, with electronic versions often providing digital readings for greater accuracy. They are essential tools for ensuring safety and proper functioning in projects involving slopes, foundations, and other structures where angle measurement is critical.