Dual-Sensor-CW2

BOM

a 6x3mm magnet at bottom for ercf https://www.amazon.com/gp/product/B07KZQGWNN
a 6x2mm magnet at top for runout https://www.amazon.com/gp/product/B07KJ9H31P
M3 DIN125 McMaster-Carr 91455A330 https://www.mcmaster.com/91455A330/
A3144E hall effects https://www.amazon.com/Gikfun-AH3144E-Magnetic-Detector-Arduino/dp/B07QS6PN3B

Demo
https://www.facebook.com/groups/556127615824168/posts/630408015062794/?comment_id=630504615053134&notif_id=1660309821195423&notif_t=group_comment&ref=notif