I got this powder alarm from
Freshly Minted Georgian!
This thing is great. It works on some type of drone sensor. First you measure the empty distance on a powder measure, then full. After that let it go and when you need powder it will alarm. Really cool piece of reloading gear and it is available in other colors to match different brands of powder measures. The first picture is my full powder measure, and the second is after loading 200 rounds of 9mm. Any questions or if you want to buy one, please pm
Freshly Minted Georgian!
. He is a great guy!