Impedance value of probe coil of eddy current sensor not only can reflect the distance from the sensor probe coil to conductor under test

but also the alternating current（ AC） resistance actually fluctuates due to changes in the ambient temperature

so eliminating the temperature effect of the AC resistance is the focus of practical application of the eddy current sensor. Taking the high-frequency reflective eddy current sensor as the research object

a simplified multi-transformer model is established based on its characteristics to calculate the AC resistance and the influence of what measured conductor is affected by temperature affecting the AC resistance is discusseded based on the existence of magnetic coupling relationship between the coil and the measured conductor. Simulation is verified by setting up simulation model using Maxwell eddy current field.