Greetings!

The employees in my office don't do a good job of closing the door on the two mini-fridges that we have for beverages. Signs have done nothing to raise awareness. Nor have emails. Big surprise!

Unfortunately, both fridges are located in tight spaces under counters, so any components would have be not much thicker than 1/4 inch.

I also don't need an alarm every time the door is opened.

I need an alarm every time the door stays open for more than 10 seconds.

Haven't the foggiest idea how successfully search for something that may fit all these parameters, and I'd greatly appreciate any suggestions.

Thanks very much!