The current sensor converts a large AC /DC current signal into a standard signal form of 4-20mA, and provides it to a computer, a display instrument or a PLC for control. Simply put, the current transformer is a kind of equipment to detect AC current, and its function is to convert large current into small current in linear proportion for easy detection.

The current transformer has stable performance, good temperature characteristics, high cost performance and strong anti-interference ability. It can also be used in relatively harsh environment, such as the detection environment of petroleum, chemical industry, boiler and coal industry. The current sensor is not disturbed and influenced by the surrounding environment when it works. For example, when used in large electrical equipment, current transformers can withstand large vibration, so they are also suitable for intelligent monitoring systems with large current loads such as generators and motors. Therefore, it can be said that current transformer is a kind of current data transmission equipment widely used in the market at present, and it has a very high cost performance.