A processor receives measurement data from a measurement device (MD) connected to an electrical shop tool (EST). The MD can sample electrical signals of a circuit connected to a sensor, such as a current transformer, and provide measurement data based on sampled signals. The measurement data can represent use or non-use of the EST. An EST, such as a vehicle lift or wheel balancer, can comprise an electrical motor connected to the electrical circuit. An EST, such as an air compressor, can comprise an electrical pump connected to the electrical circuit. The processor can determine an actionable condition based on a single measurement value or an aggregate of measurement values and determine a notification to send to a destination regarding the actionable condition. The actionable condition can be based on a rule regarding a person's preferences and attributes. The destination can be a user account, a smartphone, or another destination.