Came up with these window vibration alerts that go off very loudly (101dB) with a bit of movement and don't cost very much. Good to use if you think someone might jiggle a door handle to try entry. Works for my kitchen sliding door, maybe also the bedroom bay window. Follow up with the .410 (see below).
Buy them here.
Got a bunch of these for the manse, for the kids and a couple for the neighbors. Power's from a pair of AAA batteries. I tapped on the door window after install and it went into loud alarm mode. It WILL wake you up! Follow up with the .410!