Abstract: Provided herein are a two-directional inclination sensor for sensing an inclination of a structure and a method for manufacturing the same. The two-directional inclination sensor includes a main body of a monolithic piece configured to be installed in the structure for sensing the inclination. The main body includes a first section, a second section, a first resilient device connected between the first section and the second section and susceptible of bending along a first direction, a third section including a single-piece weight, and a second resilient device connected between the second section and the third section and susceptible of bending along a second direction. The main body is formed by a machining process to remove parts of a monolithic blank.