No, it doesn’t. It just temporally releases the pin, which is stowed and secured by a magnet normally.
If the pin is released, it is pulled out by gravity and pushed back by the bed surface when reducing the nozzle/bed distance. The upper end of the pin then triggers a fork light barrier.
This makes things quite less temperature dependent.
But that is the CR-Touch only I’m speaking about, I’ve never had a BL-Touch in my hands.
According to @LifeOfBrian (he has one running already) the cable between BDsensor and it’s electonic compartment is about 80 mm. the 1.5 m are meant between compartment and MCU.
B.t.w.: The BDsensor depends definitely on a coil, since it is an inductive sensor type. So I’m afraid it would not work very well with my pure aluminum bed with pertinax cover. Nevertheless I ordered one because of curiosity…