ETG-200

Large-Scale Electromagnetic Ultrasonic High-Temperature Corrosion Detector

Product Overview

The ETG-200 Electromagnetic Ultrasonic High-Temperature Corrosion Detector is a non-contact thickness measurement instrument that requires no acoustic couplant, enabling precise thickness assessments of metals or magnetically conductive materials.

Electromagnetic Acoustic Transducer (EMAT), a new technology emerging in the field of non-destructive testing, uses electromagnetic coupling to both generate and detect ultrasonic waves. Compared to conventional ultrasonic testing techniques, EMAT offers advantages such as high precision, no need for couplant, non-contact operation, suitability for high-temperature inspections, and ease of exciting various ultrasonic waveforms. As a result, electromagnetic acoustics is increasingly gaining attention and recognition in industrial applications.

	ETG-200 Measurable Objects
304 stainless steel, 10mm thickness, 3mm lift
	45# Steel, 10mm thickness, 7mm lift height
12Cr1MoV steel, 3.8mm thickness, 10mm lift height

EMAT electromagnetic ultrasonic technology consists of a permanent magnet and a conductor carrying alternating current. As AC energy flows through the non-contact coil, it generates an alternating magnetic field, which induces eddy currents on the surface of the base material. Charged particles moving within this magnetic field experience the Lorentz force, causing them to repeatedly change direction along the surface of the object being inspected. This Lorentz force induces controlled micro-particle displacement vibrations in the eddy current region, ultimately generating ultrasonic waves at the material's surface. The rebounded ultrasonic energy is then directly detected by the non-contact coil—via mechanisms such as magnetostriction—and converted into measurable detection signals.

Integrated infrared temperature measurement function	Bolt Elongation Measurement	High-Temperature Steel Plate Thickness Measurement Experiment (approximately 800°C)

• Designed for precise measurement of base material thickness, with a selection of multi-probe models.
• The EMAT electromagnetic ultrasonic probe is suitable for various thickness measurement applications, requiring no coupling agent and enabling non-contact measurements.
• By inputting the known speed of sound for a specific material along with real-time temperature, the most accurate value is obtained through computational compensation.
• By displaying waveforms through the device, defects can be indirectly identified.
• Equipped with a built-in infrared temperature sensor for automatic temperature compensation.

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