Hi everyone! I joined this forum because I could not find a good answer to this online.

Does some kind of alarm exist that will, say, beep if the sliding glass door of my snake's vivarium is left open for a certain length of time? All I could find were beepers for doors, but I think those may be too large or not "line up" correctly on a sliding vivarium door, even the ones made for sliding house doors. You would think these would exist for people who keep hots or something (I don't fyi but I'm trying to guard against absentminded me or my family). Any ideas? Even something that would automatically close the door would be good, but I can't imagine anything like this for a sliding glass door.