Linear Holzer sensor can be divided into open loop and closed loop. Closed loop Holzer sensor, also known as zero flux Holzer sensor. Linear Holzer sensor is mainly used for AC and DC current and voltage measurement. .

The output voltage is linear with the applied magnetic field strength, as shown in figure. It shows that there is a good linearity in the magnetic induction intensity range of B2 ~ B1.

Holzer sensor can measure the current and voltage of arbitrary waveform, such as: DC, AC, pulse waveform, etc., and even the measurement of the transient peak. The waveform of the primary side current is faithfully reacted by the side current. And ordinary transformer is unable to compare with it, it is generally only applicable to the measurement of 50Hz sine wave;