Why is my fridge not a Faraday cage ?

[georgesattali]

I thought it would be a perfect Faraday cage 'cause it's all metallic, but then I put a temperature sensor (XT300) inside the fridge... and surprise it works, the sensor (actually both of my 2 xt300) is perfectly recognised and read by the rflink (15 meters away).
Does someone have an explanation ?

[jannl]

Faraday cage also depends on the frequency of the signal. Look at a microwave. The holes in the metal shield in the windoa let you see inside, but keeps the radiowaves inside.

[georgesattali]

Hi,
I have done some more researches on my side. I am not sure about cage and frequency, I think it is not related.
But about holes, I believe you are right.
Beside, on the french wikipedia, I just read that "not every fridge are Faraday cage" (for me because of holes in the metal casing).
Thanks for your quick anwer Jannl.

[LouiS22]

For me, it's a good thing that a fridge is not a Faraday cage. I just put a Fibaro door/window sensor inside it with a Dallas sensor. Two in one: I have the temperature inside, also I can check if the door is open or closed (in the past had some issues with this ).

[manwe]

I have the Fibaro "Eye" in my fridge. In my living room I feel kind of watched by this thing.

In the fridge it reminds me to don't go to the fridge to often and besides I can get the temperature graph of the fridge.

Z-Wave Range from inside the fridge is not too good but it is enough to connect to the next routing switch a couple of meters away