How to remove an inductor after getting signal from it?
Learn to use Google Translator and write a more competent questions with all the measurable details and tolerances. (specifications)

I have taken the liberty to make assumptions on your shading pole magnetic door latch and conversion to a low current positive logic level detector to 3.3V

The current is shown with an arbitrary source current (50R) at 20Vpp which is amplified 60x for 52kHz and then detected with no loss of power to &quot;1&quot; when the signal is detected.


Simulation on browser
Normally we do not do free design work, and just for fun. Here is mine.  (if you like send me a door latch. 8)
Circuit design.