Hornady Lock-n-Load Primer Alarm

This is modeled after the Hornady Lock-N-Load® Control Panel Primer Level Sensor. It slips over the primer tube and the clamping shaft collar from McMaster will activate a microswitch when the primers drop to a certain level.

The hole at the top is meant to help guide the tube when you add more primers so you don't need to take this off when you run out.

Microswitch that I found on Digikey with 40gf: https://www.digikey.com/product-detail/en/omron-electronics-inc-emc-div/SS-5GL111-3/Z50