Custom reluctor ring, suggestions on where to get one

Thank you for the info about the single edge sensing. The result is similar to what I use for electronic advance ignition where I use a single long tab, and slot, and both edges rise and fall for each cylinder. The max advance and base timing is defined by those. I differ by using an optical vane sensing, for the timing reference.

Hall gear tooth sensors employ an internal AC coupled reference circuit. It is similar to automatic gain control AGC on a radio. Del 67Dart273 will know what I am talking about. It self tunes the threshold so the sensor works over a large temperature range, aging and target variations. It might be why there are pairs of tabs and slots, to double the frequency for more stable signal when cranking. The self tuning improves the sensor position accuracy.

Here is typical information for the application of Hall sensor targets https://www.google.com/url?sa=t&sou...-nL1H4eS8kDH2hdXg&sig2=iBww6maGyqy8FU3FZjOysQ