Since its establishment in 1964, Ohtama Co., Ltd. has been recognized in the industry as a maker specialized in magnetic shielding with Permalloy
Magnetic shielding /
Magnetic shield room/
Magnetic field canceller
Magnetic field environment measurement service
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Shield parts for electron beam units used for telecommunication equipment, broadcasting equipment and semiconductor, and electron microscopes and medical appliances
This is an active magnetic field shield system utilizing a highly sensitive sensor and a Helmholtz coil.
We are ready to make various proposals for shielding external magnetic fields, or for preventing generated magnetic fields from leaking out.
We conduct, by request, on-site measurement at a place where an electron beam unit is installed. We can also conduct low frequency magnetic field measurement of various kinds.
We conduct, by request, magnetic annealing of Permalloy and pure iron in a hydrogen atmosphere or in a vacuum.