Terrarium Door Alarms?

[wnateg]

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.

How DIY capable are you? I doubt anything exists specifically for terrariums in that regard, but the concepts are fairly simple, I think.

For the alarm, you need a magnetic switch, like this: https://www.amazon.com/dp/B07F314V3Z..._tCdSFbWQMZPE8. One for the door, one for the side, connected to an alarm.

That self closing door would be much more complex, but definitely doable. You just need a motor on a track. But you dont want to crush your snake in a motorized door. Plus if you're forgetting to close the sliding door, I think you have bigger problems.