Magnetic particle flaw detector EM-100

pinless

The AC electromagnetic yoke EM-100 is specifically engineered for magnetic particle inspection (MPI), effective at detecting surface and subsurface defects such as cracks, hairlines, tears in base materials, and incomplete fusion of welded joints. Suitable for inspecting test objects constructed from ferromagnetic materials with a relative magnetic permeability of at least 40. The EM-100 yoke finds its utility across a diverse range of industries including aviation, automotive, railway, oil and gas, power generation, and beyond. - Application areas: Welds, Machines and mechanisms parts, Cast components, Building metal structures, Pipelines, Rolled metal sheets, Castings Operational advantages: - Robust dust and moisture-proof casing ensures reliable performance in field inspection environments. - Secure connector for the power cable enhances ease of operation and equipment transportation. - Adjustable articulated arm facilitates efficient operation on components of varying configurations and orientations. - Capable of magnetizing the entire product or specific sections for testing a wide array of objects and welds. Benefits: - Ideal for non-destructive testing of ferromagnetic test objects in both field conditions and shop or laboratory settings. - Compatible with stationary magnetic particle test benches. - Features a large ergonomic trigger for easy operation even while wearing gloves. - Adjustable pole span ranging from 24 mm to 263 mm offers flexibility in inspection setups. Exploitation: Magnetic particle inspection serves as a prevalent non-destructive testing method, requiring the application of a special magnetic powder to the surface under examination. Upon magnetization of the control zone, the highest concentration of magnetic field lines is observed directly above any defects present. Magnetized powder particles accumulate at defect sites, forming discernible patterns whose localization, orientation, and extent aid in identifying surface and subsurface defects. The indicator lines are subject to visual interpretation, enabling the determination of defect localization, orientation, and extent. The resulting pattern can be cross-referenced with reference samples to enhance the efficacy of magnetic particle inspection. Technical specifications: - Average pole span: 142 mm - Max pole span: 263 mm - Min pole span: 24 mm - Pole cross section F: 26 х 25 mm - Waveform: AC - Operating current: 2.5 A - Lifting force: 10 kg - Power parameter: 230 V, 50 Hz - Duty cycle: 50 % - Detachable power cable: 3 m - Dimensions: 231 х 260 х 61 mm - Weight: 3.9 kg - Operating temperature range: -20 … +40 °С Delivery set: - Portable yoke unit - Power cable - Equipment certificate - User manual - Convenient carrying bag for easy transportation and storage FAQ - What is Magnetic Particle Inspection (MPI)? Magnetic Particle Inspection (MPI) is a widely used nondestructive testing technique designed to detect surface and near-surface discontinuities in ferromagnetic materials like iron, nickel, cobalt, and their alloys. This method works by introducing a magnetic field into the object being tested. If there are any cracks or flaws, they disrupt the magnetic field, causing magnetic flux leakage. To visualize these imperfections, small ferrous particles (either dry powder or suspended in a liquid) are applied to the object's surface. These particles gather at the areas of flux leakage, forming visible indications that mark the location of the defects. MPI can use two different magnetization methods: direct and indirect. In direct magnetization, an electric current passes directly through the test object, creating a magnetic field within the material. Indirect magnetization uses an external magnetic source to magnetize the object without passing current through it. The type of electrical current used for magnetization also plays a crucial role. Alternating current (AC) is often used for detecting surface defects due to its shallow penetration. For subsurface flaws, full-wave direct current (FWDC) or half-wave direct current (HWDC) is preferred, as these currents penetrate deeper into the material, providing more comprehensive inspection. Types of Electrical Currents Used in MPI: - Alternating Current (AC): Best for detecting surface-level defects, AC creates a magnetic field that remains mostly on the surface of the object due to a phenomenon called the "skin effect." The current alternates polarity rapidly (50-60 cycles per second), meaning it does not penetrate deep into the material. This limits its use for subsurface detection but makes it ideal for identifying surface discontinuities. - Full-Wave Direct Current (FWDC): FWDC is used when deeper penetration is required to find subsurface discontinuities. Unlike AC, FWDC can magnetize thicker cross-sections of material, making it more suitable for larger or thicker parts where surface inspection is insufficient. - Half-Wave Direct Current (HWDC): HWDC provides a balance between surface and subsurface detection. Its pulsating current helps move the magnetic particles during inspection, increasing the likelihood of detecting surface cracks. This mobility of particles, combined with deeper penetration than AC, makes HWDC effective for both surface and shallow subsurface inspection. An AC electromagnet is most effective for detecting surface-breaking indications, while some form of DC, such as FWDC or HWDC, is better suited for identifying subsurface defects. MPI is a versatile inspection method used in industries such as aerospace, automotive, and construction, where the integrity of metal components is critical. - Key technical characteristics: - Model: EM-100 - Type: AC electromagnetic yoke for magnetic particle inspection - Average pole span: 142 mm - Max pole span: 263 mm - Min pole span: 24 mm - Pole cross section: 26 х 25 mm - Operating current: 2.5 A - Lifting force: 10 kg - Power: 230 V, 50 Hz - Duty cycle: 50% - Detachable power cable: 3 m - Dimensions: 231 х 260 х 61 mm - Weight: 3.9 kg - Operating temperature: -20 … +40 °С