Benefit:

1. Avoid the temperature drift.
   
2. Auto z_offset Calibrate From the data bellow we can see that the temperature drift will only change the z_offset, rise or low the bed mesh, but does not change the bed mesh with this BDsensor. that means the bed mesh is the same even with different temperature.
   

3. Repeatability: +/-0.005mm

Nozzle Collision Sensing with eddy BDsensor (pandapi3d.com)