A current sensor relay switch is a device that is used to detect the presence of an electric current. It is a type of relay switch that is used to control the flow of electricity. The current sensor relay switch is designed to detect the presence of a current in a circuit and then open or close the circuit accordingly. This type of switch is often used in industrial applications, such as motor control, where it is necessary to detect the presence of a current in order to control the flow of electricity. The current sensor relay switch is also used in home automation systems, where it is used to detect the presence of a current in order to control the flow of electricity to different appliances. The current sensor relay switch is a very useful device that can be used to detect the presence of a current in a circuit and then open or close the circuit accordingly.