Door Alarm that stays on and doesn’t stop after the door is opened


I am looking for a door alarm that would stay On and keeps sounding off, even when the door is closed quickly.

Say if an intruder comes in. Opens the door. Alarm goes off. He quickly closes the door back, then alarm dies off. This is what I see in basic sensors available.

I do not have any security system and I am starting to build one. Do the ring door alarm or any other smart systems keep going off even after the door is closed?


I have a two story home and we sleep above. I would miss the alarm, if it beeps and the intruder closes the door before I realize it happened. I want a relay that stays open, until I can reset it somehow.

Let me know, if you know about such a product.


submitted by /u/shenkris
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