オータマ List of Products and Services

●Current Sensor Current clamp cores (clamp meters) measure by clamping around power lines, and some high-sensitivity models use permalloy. Additionally, gap cores, which have a portion of round or square iron cores cut out, detect magnetic fields by inserting Hall elements into the cut section. Permalloy, which can detect even slight magnetic fields, plays an important role in controlling the batteries of hybrid and electric vehicles. ●CT (Current Transformer) Core Current transformers are devices that adjust current values, effectively reducing large currents on the primary side to manageable levels on the secondary side. One example is the ZCT (Zero Sequence Current Transformer) used in leakage breakers in distribution panels, where the highly sensitive permalloy reliably detects even minor electrical leaks. ●EI Core This is a core shaped literally like an "E" or "I." Permalloy cores have a higher permeability compared to other magnetic materials and are used in small power transformers and current transformers. *For inquiries or consultations regarding our products, please use the contact form on our website. 【Contact Us】https://www.ohtama.co.jp/contact.html

• Public Testing/Laboratory

●High Performance By using materials developed with proprietary technology and conducting everything in-house from simulation, manufacturing, magnetic annealing, to performance measurement, we achieve high performance. Upon delivery, we will provide a report from the performance evaluation conducted. ●Three Types of Lineup We offer three products with different performance characteristics. By selecting according to your needs, you can eliminate the time required for specification consideration. For specifications, please refer to the materials available for download on our company website. The materials also include data from measurements of the product's magnetic shielding performance. ●Plastic Breadboard A plastic breadboard with 289 M4 screw holes has been installed inside the magnetic shielding box. You can start using it immediately after purchase by installing coils and sensors. *For inquiries and consultations regarding our products, please use the material download page or the contact form on our company website. 【Contact Us】https://www.ohtama.co.jp/contact.html 【Download Materials】https://www.ohtama.co.jp/download.html

• Insulation Tester
• Other metal materials
• Contract manufacturing

We often receive questions from customers about the characteristics, properties, and effects of Permalloy. This kit has been prepared for those individuals. By actually seeing and touching Permalloy, you will be able to understand what kind of metal it is. <Kit Contents> - Permalloy (PC) thickness t0.1, size 450x450mm, 2 sheets - Permalloy (PC) thickness t0.2, size 320x320mm, 2 sheets - Permalloy (PC) thickness t0.8, size 320x320mm, 2 sheets - Double-sided tape, 1 roll *If you would like to download materials, you can do so from our company website. For inquiries or consultations regarding the products, please use the material download page or the contact form on our company website. [Material Download] https://www.ohtama.co.jp/download.html [Contact] https://www.ohtama.co.jp/contact.html

• Electron beam lithography equipment
• Semiconductor inspection/test equipment
• Other inspection equipment and devices

▼Features of Magnetic Shield Rooms and Magnetic Shield Cases▼ ●Magnetic Shield Room A magnetic shield room is constructed by attaching magnetic shield materials to the walls and ceiling of a building. This method primarily involves on-site work and is used for relatively large rooms. It is also possible to create new wall surfaces by erecting partitions in areas where there are no building walls. ●Magnetic Shield Case This is a smaller box-shaped shield compared to a room. It is mainly used for measuring devices that utilize electron beams, such as electron microscopes, and is installed to completely cover the device, protecting it from external magnetic fields. It is self-supporting with an aluminum or stainless steel frame, and a permalloy magnetic shield is constructed. The position and size of doors and openings can be designed according to your requirements. *For inquiries or consultations regarding our products, please use the contact form on our website.* 【Contact Us】https://www.ohtama.co.jp/contact.html

• Public Testing/Laboratory

▼Features of Magnetic Annealing and Heat Treatment▼ Permalloy's magnetic properties improve dramatically only after heat treatment. At Ohtama, we have a wealth of heat treatment patterns prepared based on years of experience, tailored to the material and quantity, allowing us to maximize the characteristics of different manufacturers and materials. *For inquiries or consultations regarding magnetic annealing and heat treatment, please use the contact form on our website. We also have materials available. 【Contact Us】https://www.ohtama.co.jp/contact.html 【Download Materials】https://www.ohtama.co.jp/download.html

• transformer
• Semiconductor inspection/test equipment
• Sensors

▼Features of Magnetic Shielding Material Permalloy▼ ●High Permeability ・Permalloy PC (Nickel content 78-80%) Permalloy PC (Fe-Ni alloy) has a very high permeability and is often used to protect beams in electronic optical products from environmental magnetic fields. ・Permalloy PB (Nickel content 45%) Permalloy PB (Fe-Ni alloy) has high saturation and is mainly used in products with relatively strong magnetic fields, such as cores. ●Excellent Workability Like other metals, it can be processed in almost all ways, including laser cutting, bending, welding, press forming, deep drawing, and rolling. We also provide consistent heat treatment to enhance magnetic properties, allowing us to deliver products tailored to your requirements. ●Wide Variety of Plates We offer plate thicknesses starting from 0.1 mm. We cut and heat treat to your desired size before selling. *For inquiries or consultations regarding our products, please use the contact form on our website. 【Contact Us】https://www.ohtama.co.jp/contact.html

• Press Dies

▼Features of Active Magnetic Shielding (Magnetic Field Canceller)▼ - Quick on-site installation - Does not compromise the operability of electron beam devices - Low cost - Excellent aesthetics - Customizable size (it is also possible to implement the cancellation coils into the device frame) *For inquiries or consultations regarding the product, please use the contact form on our website. We also have materials available. 【Contact Us】https://www.ohtama.co.jp/contact.html 【Download Materials】https://www.ohtama.co.jp/download.html

• Electron beam lithography equipment

Ohtama Co., Ltd., which handles magnetic shielding and magnetic components, manufactures products primarily made from iron-nickel alloy (Permalloy). In sheet metal processing, we can perform welding, spot welding, laser processing, and wire processing, just like with other metals. We accommodate everything from prototypes to mass production. Additionally, we also carry out press processing and drawing processing. 【Processing Technologies】 ■ Sheet Metal Processing ■ Press Processing ■ Drawing Processing ■ Machined Products ■ Various Pipes ■ Shield Cases *For inquiries and consultations regarding the processing of Permalloy, please use the contact form on our website. 【Contact Us】https://www.ohtama.co.jp/contact.html

• alloy
• Other metal materials

Permalloy is a nickel-iron alloy that contains 35-80% nickel (Ni) and is supplied in various forms such as sheets and rods, similar to many other metals. Its appearance is not significantly different from stainless steel or iron, but it possesses special properties that strongly attract magnetism. Due to its low coercivity and high permeability, it has a high magnetic shielding effect and a strong magnetic collecting action. It also exhibits a large output (magnetization) in response to fine input (magnetic field), and it increases the resistance (the ratio of voltage to current) in alternating current. As a result, it is applied in magnetic shielding rooms, magnetic shielding cases, magnetic shielding boxes, magnetic sensors, and various inductors (coils with windings on a core). It is effective in a relatively low frequency range, from extremely low frequencies below 1 Hz to commercial frequencies up to 200 Hz. 【Effects】 ■ High magnetic shielding effect and strong magnetic collecting action ■ Large output (magnetization) in response to fine input (magnetic field) ■ Increases resistance (the ratio of voltage to current) in alternating current *For inquiries or consultations regarding Permalloy, please use the contact form on our company website. 【Contact】https://www.ohtama.co.jp/contact.html

• alloy
• Other metal materials