Ultra strong neodymium magnet in a SimplePack Plus case with double-sided permanent tape for hall probe
https://simplehw.eu/shop/ultra-strong-neodymium-magnet-in-a-simplepack-plus-case-with-double-sided-permanent-tape-for-hall-probe-93
https://simplehw.eu/web/image/product.template/93/image_1920?unique=881d3ca
For reed switch/dry contact. Can be fixed with industrial double sided tape
