Technical Perspective: Omega Museum Opens New Exhibit Showcasing Antimagnetic Tech (With An Aqua Terra That Survived An Insanely Powerful Magnetic Field)
Antimagnetic watch display, Omega Museum, Bienne.
Magnetism is obviously an enormous issue in watchmaking. Super ground-breaking magnetic fields like those made in labs considering magnetism are less an issue than the magnetic fields found in regular day to day existence, for example, those delivered by perpetual incredible magnets utilized in customer items. Despite the fact that Nivarox-type balance springs are not close to as helpless against magnetism as plain steel, they can nonetheless be influenced; even concise openness to a solid field can gravely disable exactness. Less perceptible is the impact of magnetic fields over the long haul – you probably won’t see it promptly, however after some time, openness to magnetism can adversely influence the capacity of a Nivarox-type balance spring to compensate appropriately for temperature variations.
Traditionally, the best approach to manage magnetic fields was to put the development in an internal case made of alleged “delicate iron.” For this situation, “delicate” signifies delicate magnetically – that is, a material that will lead a magnetic field, however not become magnetized itself; such materials are for the most part nickel-iron composites, and are additionally called “mu-metals,” the Greek letter mu (μ) being the image for magnetic permeability.
In January 2013, Omega declared the Aqua Terra >15,000 Gauss , which is equipped for withstanding a 15,000 gauss magnetic field (that is MRI machine-level stuff; your normal fridge magnet is around 50 gauss). Additionally, 15,000 gauss is identical to 1.5 tesla, a more advantageous unit for communicating solid magnetic fields.
Omega has set another world’s record for presenting watches to magnetic fields.
Incredibly, the Seamaster Aqua Terra at the core of the display withstood a field 16 tesla, or 160,000 gauss. The test occurred at the Laboratoire National des Champs Magnetiques Intenses (LNCMI) in Grenoble, France, a lab which has some expertise in examination into very incredible magnetic fields. Hardware at LNCMI can produce supported fields of up to 35 tesla, and at the lab’s Toulouse office, millisecond-length fields of up to 250 tesla have been created (albeit this obliterates the field generator loop). For reference, the magnets used to limit the molecule light emissions Large Hadron Collider work at about 8.3 tesla – in excess of multiple times as ground-breaking as the Earth’s magnetic field.
A watch with a silicon balance spring is now essentially more impervious to magnetism than one with a standard equilibrium spring, however Omega accomplishes this degree of antimagnetism through the use of non-ferromagnetic materials all through the development, including the turns – which is the reason the Aqua Terra not just pursued fine openness to a particularly solid field, yet during openness as well.
As a side note, if a magnetic field gets sufficient it will have obvious impacts even on materials not as a rule considered as defenseless to magnetism. Diamagnetism is one such impact; the term alludes to a circumstance where a solid magnetic field, applied to a specific material, will produce a restricting magnetic field in that material. This implies that a few substances are really repulsed by magnetic fields, as opposed to pulled in. Bismuth and antimony are both repulsed by magnetic fields, and in the event that you have sufficient juice you can do things like suspend frogs, as was done in an examination lab in 2000, at the Nijmegen High Field Magnet Laboratory.
The frog was safe, albeit without a doubt a little disoriented.
For an exceptionally inside and out glance at magnetism in watchmaking, look around then we purchased a 4,500 gauss neodymium magnet and stuck an Omega Aqua Terra and a Milgauss on it.