Introduction: Defrost Detector

Picture of Defrost Detector

When your freezer derails, it may take a while to notice it. Sometimes too. To avoid food intoxitations, here's a tip. Hack your freezer!

Step 1: Components and Tools Needed:

Picture of Components and Tools Needed:


- cutter


- 2 plastics bottles

- food coloring

- water

Step 2: Construction

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If you have two identical bottles, cut into 2 parts.

Otherwise, cut the top of the bottle and the neck. You now have a stand for your bottle.

Step 3:

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Put a few centimeters of water in the bottle, and a few drops of food coloring.

Put the bottle in the freezer. When the bottle is frozen, return it.

Step 4: Finish

Picture of Finish

If the water is in the back of the bottle, you have a problem !


angelopoulosk (author)2016-06-02

What does this actually detect?

About This Instructable




Bio: Dad, Maker, biker, trekker, I like sciences, technology, martial art and wild.
More by thefrenchmaker:Explosive Intrusion Alarm. the MacGyver Trap.Survival blanket shade shelterElectromagnetic  Hammer
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