The measurement of electric current is not always stable, especially when the measured signal requires further electronic conditioning such as printed circuit board (PCB). The current signal must be satisfied to detect the signal into a micro-computer in which sensors transfer current signal into a proportional voltage. The basic sensor requirement includes galvanic isolation and operated a high bandwidth; it is usually define the bandwidth from DC up to at least 100 kHz. Recently, the Internet of things (IoT) is one of the attention trends in the industry. It deploys solutions that harness multiple technologies from smart sensors, for example, magnetic sensor, and digital data processing to communications, all with the goal of enhancing everyday life. Current transformer sensor is most of popular device for current detection. This paper presents a magnetic current sensor with amorphous material to use to detect the power system in high current signal detection which are also has appliance implemented in Internet of Things.