Glass break sensors are a type of intrusion detection device that use acoustic technology to detect the sound of breaking glass. These sensors are designed to detect the unique sound signature that is created when glass breaks, and can be used to monitor windows or glass doors in a wide range of applications, including homes, businesses, and other types of properties. When a glass break sensor detects the sound of breaking glass, it sends a signal to a control panel, which then triggers an alarm or other notification.