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What is Current Sensor ?

A current sensor is a device that detects and converts current to an easily measured output voltage, which is proportional to the current through the measured path. Measuring a voltage in any system is a “passive” activity as it can be done easily at any point in the system without affecting the system performance. However, current measurement is “intrusive” as it demands insertion of some type of sensor which introduces a risk of affecting system performance. Current measurement is of vital importance in many power and instrumentation systems. Traditionally, current sensing was primarily for circuit protection and control. However, with the advancement in technology, current sensing has emerged as a method to monitor and enhance performance.


Eliminates ground disturbance

Load connects system ground directly

Detects the high load current caused by accidental shorts