Current and Thermal Sensors KEMET has a large selection of Current Sensors and Thermal Sensors available. The current sensors are used to measure the amount of current flowing in a circuit. These sensors are based on proprietary magnetic materials and are available as low or high alternating current transformers and zero-phase transformers. KEMET's thermal sensors can be used to make or break an electrical connection when a defined threshold temperature is reached. These sensors are typically used to shut down electrical equipment in monitoring, heater controls, and automotive electric fan applications.Learn More