I need some kind of alarm that can tell me when the power is cut. ?

Question

My girlfriend has an ice cream truck, she has to park in her driveway and at night there is an extension cord that runs from the freezers to the outlet on the house. Well some kids think it's funny to unplug it costing her money with ruined product. Is there any type of device that could be attached to either end of the cord (before the outlet or freezer) that would go off if power is cut? Seems really simple but doubt there is huge demand for something like this.

Answer 1

You may be surprised at what is available! here is one devise!

http://www.amazon.com/CSH-Incorporated-F...

You can search for power failure alarms, or freezer alarms!

Here is another!

http://www.talkaboutsleep.biz/?action=it...