This chapter is about other types of smart grid sensors as well as off-domain measurements. Off-domain measurements are the kind of measurements that are not primarily intended for the power sector; yet they can help with certain smart grid applications. These additional data and measurements can be used as stand-alone data, or in cross examination with the measurements that were discussed in the previous chapters. Device and asset sensors may provide electrical, mechanical, and chemical measurements. They can be used to monitor transformers, capacitor banks, line conductors, wind turbines, solar panels, and batteries. Building sensors are also discussed, such as different types of occupancy sensors, temperature and illuminance sensors, and measurements related to electric vehicles. Applications of financial data, including pricing and billing data, and data from electricity markets are explored. We also discuss the applications of images, laser images, and drones in smart grid monitoring. Other types of off-domain measurements are also briefly mentioned, such as the weather data, the data from national lightning detection network, traffic data, and data from social media.