We are considering approaches for developing nonintrusive sensors that are relatively easy to install. These sensors offer several potential advantages. They can be installed at a central location and used to monitor the aggregate behavior of a collection of devices, reducing installation costs. Signal processing techniques can be used to disaggregate the behavior of individual devices influencing the aggregate stream. Data from these nonintrusive sensors is inherently collated. This talk will review three different examples of nonintrusive sensors: the Electronic Stethoscope, WaterWolf, and VAMPIRE. These three sensor systems permit nonintrusive monitoring of electric power consumption, water or fluid consumption, and electromechanical system performance including vibration monitoring, respectively. This talk will examine approaches for deploying and coordinating the operation of these sensors to secure data, minimize the need for communication bandwidth, and ensure the presentation of actionable information for enhancing system operation.