Nihon Denji Sokki Co., Ltd. (NDK)

What Nihon Denji Sokki Co., Ltd. (NDK) does

Nihon Denji Sokki Co., Ltd. (NDK) is a Japanese specialized manufacturer of magnetic application equipment and non-destructive testing systems, headquartered in Tachikawa, Tokyo, with operations tracing to 1953. The company produces a complete product lineup spanning five core technology families: magnetizing equipment (capacitor, multi-pole, DC orientation methods), demagnetizing equipment (AC, inversion, inverter), magnetic measuring instruments (tesla/gauss meters, flux meters, BH curve tracers), non-destructive testing equipment (magnetic particle testing, penetrant testing, eddy current testing, and ultrasonic testing), and ultrasonic thickness gauges for metals, glass, and resins. The underlying technology relies on electromagnetic principles, including proprietary Hall element sensors with temperature coefficients of -0.05%/°C or below and search coil sensors capable of measuring pulse magnetic fields up to 9.999T. The ultrasonic flaw detector (FAUT) supports up to 64 channels with TCP/IP LAN communication for factory automation integration.

Revenue is generated through one-time sales of specialized industrial equipment and aftermarket services including consumables (fluorescent magnetic powder, electrodes, UV lamps), maintenance, calibration, and repair. The company operates an enterprise field sales model with direct sales teams in Japan, wholly-owned subsidiaries in Shanghai (two entities handling magnetization and NDT respectively) and Bangkok (NDK ASIA covering Southeast Asia, South Asia, and West Asia), and a 2024 channel partner agreement with Germany's ELSOMA GmbH. Customer segments span manufacturing and industrial quality control (primary), EV motor manufacturing, and maintenance/inspection services across steel, automotive, aerospace, and railway end-markets. The company is privately held with no disclosed funding rounds, parent company, or external investment.

Name

Nihon Denji Sokki Co., Ltd. (NDK)

Legal name

日本電磁測器株式会社 NIHON DENJI SOKKI CO.,LTD.

Website

https://j-ndk.co.jp

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

Nihon Denji Sokki Co., Ltd. (NDK) is a Japanese manufacturer founded in 1953 specializing in magnetic application equipment (magnetizers, demagnetizers) and non-destructive testing systems (magnetic particle, ultrasonic, eddy current, penetrant). It serves enterprise customers in steel, automotive, aerospace, EV motor, and industrial inspection markets through direct sales in Japan plus subsidiaries in China and Thailand.

Ownership category

akta.pro rank

Product category

Industrial Non-Destructive Testing Equipment

NAICS

Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Other Measuring and Controlling Device Manufacturing (334519)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Electronic & Other Electrical Equipment (No Computer Equip) (3600)

akta.pro primary industry

NDT/NDE Inspection Equipment (Ultrasonic, eddy current, radiography, thermography) (IMAGAFAI)

akta.pro secondary industry

Non-Destructive Testing (NDT) & Advanced Inspection (Phased Array, TOFD, Guided Wave) (EUAEAKAF)

Keywords

• Magnetic application equipment
• Non-destructive testing
• Magnetization equipment
• Ultrasonic thickness gauges
• Magnetic measurement instruments

Headquarters

HQ city

Tachikawa, Tokyo

HQ country

Japan

HQ region

Asia

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Technology or R&D, Personnel, Marketing or Sales, Infrastructure

Revenue model

1. Magnetic Application Equipment Sales: Sale of specialized equipment including magnetizers, demagnetizers, non-destructive testing equipment, magnetic measuring instruments, and ultrasonic thickness gauges. Products range from portable handheld devices to large-scale automated systems.
2. Aftermarket Services: Consumables (fluorescent magnetic powder, black lights, electrodes), maintenance, calibration, and repair services for installed equipment base.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

NDK is a specialized manufacturer of magnetic application equipment and non-destructive testing systems. The company designs, manufactures, and sells magnetizers, demagnetizers, magnetic measuring instruments (tesla/gauss meters, flux meters, pulse current meters, BH curve tracers), non-destructive testing equipment (magnetic particle, penetrant, eddy current, ultrasonic), and ultrasonic thickness gauges. Products range from portable handheld devices to large-scale automated factory systems, serving steel, automotive, aerospace, railway, and general manufacturing industries across Japan, China, Southeast Asia, South Asia, Germany, and India.

Product overview

Nihon Denji Sokki Co., Ltd. (NDK) is a specialized manufacturer of magnetic application equipment and non-destructive testing systems. The product portfolio centers on five core technology families: (1) Magnetizing equipment (着磁器) for imparting magnetization using capacitor, multi-pole, and DC orientation methods; (2) Demagnetizing equipment (脱磁装置) for removing magnetization using AC, inversion, and inverter methods; (3) Magnetic measuring instruments including tesla/gauss meters (GV-400B, GV-400, TGX-1000), flux meters, pulse current meters, and BH curve tracers; (4) Non-destructive testing equipment encompassing magnetic particle testing (MT), penetrant testing (PT), eddy current testing (ET), and ultrasonic testing (FAUT); and (5) Ultrasonic thickness gauges (UDM series) for metals, glass, and resins. Supporting products include magnetic field press equipment, UV black lights, fluorescent magnetic powders, and accessories. NDK also maintains overseas operations in Shanghai and Bangkok. The company positions itself as a pioneer in magnetic application technology.

Differentiator

Problem solved

Functional benefit

Products and services

• Tesla Meter / Gauss Meter (GV-400B) Handheld tesla meter with Bluetooth communication for measuring DC and AC magnetic field intensity. Features color LCD display, automatic probe calibration, and continuous 6-hour battery life. Targets industrial quality control and magnetic field measurement applications.
• Tesla Meter / Gauss Meter (GV-400) Handheld tesla meter for measuring DC and AC (RMS) magnetic field intensity. Supports horizontal and vertical probes with automatic calibration. Used in industrial magnetic field measurement applications.
• Tesla Meter (TGX-1000) Wide-range, high-performance tesla meter with USB communication standard. Measures DC and AC (RMS/PEAK) from 0.01mT, with built-in peak hold and comparator functions. Designed for precision magnetic measurement in industrial and laboratory settings.
• Pulse Current Meter (GP-300) Pulse magnetic field measurement meter using search coil sensors. Reads pulse magnetic fields during magnetization up to 9.999T and supports oscilloscope waveform observation. Used for pulse magnetization processes in industrial applications.
• Analyzer (UHS-1DS, UHS-3DS) High-speed magnetic measurement analyzers for comprehensive magnetic field analysis. Used in laboratory and industrial magnetic property testing applications.
• Flux Meter (NFX-1000A) Instrument for measuring magnetic flux using fluxmeter technology. Used in laboratory and industrial magnetic flux measurement applications.
• Pulse Current Meter (PM-200A) Pulse current measurement device for testing pulse magnetic field characteristics. Used in industrial and laboratory settings for magnetic field characterization.
• Magnetic Characteristic Measurement System (BH Curve Tracer) Systems for measuring magnetic hysteresis and characteristics, including DC type 6700BH, Pulse type PBH-1000, Superconducting coil type SBH-1000, and VSM type VSM-1000. Used in magnetic materials research and quality control.
• Magnetizer / Magnetizing Equipment Equipment for imparting magnetization to magnetic materials, including capacitor type, ultra-multi-pole magnetizing devices, magnetizing systems, magnetizing yokes/coils, and DC orientation devices. Used in manufacturing processes requiring magnetic component magnetization.
• Demagnetizer / Demagnetizing Equipment Equipment for removing magnetization, including AC type through-type (air-core), plane type (iron-core), AC/DC inversion type, inverter type, and DC inversion type demagnetizers. Used in industrial demagnetization processes.
• Magnetic Particle Inspection Equipment (MT) Non-destructive testing equipment using magnetic particle methods, including magnetization power supply units, magnetic particle flaw detectors (portable, automatic image processing with AI, bench type), black lights, fluorescent magnetic powder, and accessories. Used for surface and near-surface defect detection in metallic components.
• Penetrant Testing Equipment (PT) Non-destructive testing equipment using liquid penetrant inspection methods for detecting surface flaws in non-porous materials. Used in quality control and inspection applications.
• Eddy Current Testing Equipment (ET) Non-destructive testing equipment using electromagnetic induction to detect surface and near-surface flaws, measure conductivity, permeability, coating thickness, and dimensions. Used in aerospace, automotive, and industrial inspection.
• Ultrasonic Flaw Detector (FAUT) Factory automation ultrasonic flaw detector with 8-channel standard configuration expandable to 64 channels. Features MAX 400V transmission voltage, 110dB gain with 0.1dB pitch, PLC control, and TCP/IP LAN communication. Designed for industrial integration in production lines.
• Ultrasonic Thickness Gauge (UDM Series) Precision ultrasonic thickness gauges for measuring material thickness. Models include UDM-550V/550DL (general metals), UDM-750/750DL (precision), UDM-580 (corrosion measurement), UDM-1300 (cast iron), UDM-960 (ultra-precision glass), and UDM-1100 (resin/FPR/rubber). Used in quality control, corrosion monitoring, and material inspection.
• Hollow Shaft Ultrasonic Thickness Measurement System Automated ultrasonic thickness measurement system designed specifically for hollow shafts, enabling inline inspection capabilities. Used in automotive and industrial manufacturing for shaft inspection.
• Magnetic Field Press Equipment Press equipment utilizing magnetic fields for industrial assembly and processing applications, including RIP automatic equipment. Used in manufacturing processes requiring magnetic field-assisted pressing.
• Black Light (UV Lamps) UV light sources for magnetic particle and penetrant inspection, including portable type MB 3.0 Selena, BB 2.0 Helios, headlight type UVG5 2.0, stationary type ZERO-500/5, mounted type MIZ-500L, ring type NU series, and portable/pen type UVG2. Used as accessories for NDT inspection processes.
• Fluorescent Magnetic Powder FM series fluorescent magnetic powders and magnetic powder dispersants for magnetic particle inspection, including the Mag Pack no-preparation-required product. Consumable used in magnetic particle inspection processes.

Quantifiable outcome

• Multi-channel ultrasonic flaw detector supporting up to 64 channels for large-scale inspection applications

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Four partnerships are on record, tiered minor and core.

• ELSOMA GmbH (Germany)minorChannel Partner/ Reseller/ Distributor · 21 May 2024German distribution partnership established in May 2024. ELSOMA GmbH serves as NDK's channel partner for German market, distributing NDK's magnetic application equipment and non-destructive testing products.
• 上海瑞穂磁気有限公司 (Shanghai Rihui Magnetic Co., Ltd.)coreStrategic or Co-development PartnerWholly-owned subsidiary in Shanghai, China handling magnetizers, magnetization yokes, and magnetic field measuring instruments. Conducts local design, manufacturing, and maintenance. Supports China domestic market with RMB settlement and Japanese-speaking staff.
• 上海笠原電装有限公司 (Shanghai Kigihara Electric Co., Ltd.)coreStrategic or Co-development PartnerWholly-owned subsidiary in Shanghai, China handling non-destructive testing equipment (magnetic particle flaw detectors) and magnetic field press equipment. Conducts local design, manufacturing, and maintenance. Control components imported from Japan.
• NDK ASIA CO., LTD.coreStrategic or Co-development PartnerWholly-owned subsidiary in Bangkok, Thailand covering Southeast Asia, South Asia, and West Asia regions. Offers same products as Japan headquarters. THB settlement available with Japanese and local Thai staff.

Scale indicators1 record

Recent moves8 records

Expansion highlights6 records

Market position

Competitive moat4 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/nihon-denji-sokki-co-ltd-ndk

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Nihon Denji Sokki Co., Ltd. (NDK)