Tue 17 May 2011
Anti-Magnetic Iron Faraday Cage
Posted by The Breitling Source under Omega , Watch Movements[5] Comments
I stumbled upon some photos I took of a iron faraday cage from an Omega Seamaster Chronodiver 300m, so I decided to make a short post. Sometimes you might notice that watches have an Anti-Magnetic rating or spec shown on the case back of the watch, and might wonder what that means. Well, since automatic movements are susceptible to magnetic fields which can affect the accuracy of their movement, it is handy for them to have some magnetic protection, especially in this day and age.
That Anti-Magnetic Iron cage or shield is called a Faraday Cage, named after the English Scientist, Michael Faraday. The cage surrounds the movement of the watch and protects it from certain levels of magnetic fields. Some watches that have soft iron Faraday Cages inside: IWC Ingenieur, Omega Seamaster 300m, Rolex Milgauss.
Here is a shot of the Omega 1164 Movement underneath the Iron Cage:
May 19th, 2011 at 2:06 pm
Great photos, thanks for sharing. I knew the watch had some protection against magnetism but I guess I never thought about how it actually achieved it.
July 17th, 2011 at 1:26 pm
i’ve noticed that you dont have a trace of grand seiko or credor watches, those should not be ignored because i have found that their finish, fit and overall quality is of a higher standard than rolexes, breitlings and omegas. They also have a higher accuracy rate than chronometers. I speak from experience although i never had an omega before, i still think it would beat the crap out of an omega
July 17th, 2011 at 2:33 pm
Nope, and I don’t have a trace of many other brands either. Its not because I don’t want them, but that the opportunity has never presented itself. However, thank you for your opinion – they certainly are very nice watches that I one day hope to acquire.
January 23rd, 2012 at 8:48 pm
It’s not a Faraday Cage. Faraday Cage is designed to block varying Electrical Field, and it’s simply a cage/box made of good conducting material such as copper. On the other hand, the shield used in watches are made of high magnetic permeability material (same material as transformer core) in order to draw magnetic field to it self.
January 23rd, 2012 at 9:55 pm
Interesting. Thank you for the mini science lesson!