Electro-mechanical systems include all of the following components EXCEPT:

The correct answer identifies closed circuit video as the component that is not an electro-mechanical system. Electro-mechanical systems typically involve a combination of electrical circuits and mechanical components to perform a function, such as detecting motion or breakage.

Glass break sensors, motion detectors, and audio sensors all operate through the integration of mechanical and electrical concepts. For instance, motion detectors use technology that can detect movement, often involving mechanical parts that sense physical changes, along with electrical signaling to alert to those changes. Similarly, glass break sensors rely on mechanical vibration and sound to activate an electrical response.

In contrast, closed circuit video systems primarily involve electronic components, such as cameras and recording devices, which capture and transmit visual information. While these systems may incorporate some mechanical elements (like camera tilt or pan functions), they are fundamentally based on electrical technology focused on video capture and transmission rather than on the interplay between mechanical movement and electronic control that characterizes electro-mechanical systems. Hence, closed circuit video stands apart from the other listed components as not being classified as an electro-mechanical system.