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ROHMANN Eddy Current Test Instruments and Systems
Since 1977 we have been developing, producing and distributing eddy current testing devices and systems, which are now used worldwide in crack, heat treatment, material confusion and grinding burn testing. Testing solutions for every requirement and every demand. Made in Germany.


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Aerospace Symposium


ELOTEST\M6 – Multiplex of 256 sensors max., for example with the latest array technology and with an external Mini-Mux integrated in the sensor. C-Scan display for array probes and rotor applications.


The ELOTEST\M6 is dustproof and to a limited extent waterproof. It has the corresponding IP protection class so that it can be temporarily immersed in water to a maximum depth of 1 meter for a maximum of 30 mins.


By using a dual probe, the ELO\WHEEL 800 makes it possible to inspect aircraft wheel rims for the detection of cracks on the surface and also defects inside the material at the same time.


The large surface double test probe (HF/LF) with integrated compensation unit enables smooth gliding over the rim surface. Bead seat and the rim flange are automatically recognized and passed over with the aid of approach switches.


The robot-controlled, automated eddy current testing system ELO\SCAN is primarily designed for testing rotationally symmetrical engine parts. Thanks to its universal design, the system can also be used to test other complex component geometries.


The precise sensor guidance of the enables testing along the surface in hard-to-reach places using application-specific sensor holders. In addition to rotating scanning with a punctual sensor, the inspection of bores can be integrated into the test sequence.


The FLEXITEST enables flexible and precise 3-axis eddy current testing for cracks and grinding burn. This system is a fast, transparent and reproducible quality control system for individual parts and small series testing.


Precision chuck for clamping the test object – clamp object either manually or automatically as desired, to increase your process reliability and to offer yourself the possibility to test fully automatically, with integration in robotic cells.


ELOTEST\PL650 RC in an air-conditioned control cabinet, display and operation via a 21“ touch display. Hard- and software for the operation and the support are integrated by means of a remote access. System: n-dect; Test Instrument: Rohmann GmbH

Product videos

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Do you have any questions?

Frequently asked questions

What is eddy current testing?

Eddy current testing can be used to check objects made of electrically conductive materials for integrity, composition and tempering condition or also for geometric dimensions. Eddy current testing is based on the physics of electromagnetic fields.

How is eddy current generated?

A current-carrying electrical conductor is surrounded by a circular magnetic field (vortex field). If the straight conductor wire is now wound into a circular conductor loop, the vortex-like field lines overlap in such a way that they form a magnetic dipole (with a north/south pole structure).

What does penetration depth mean?

In principle, eddy current testing can be classified as a surface testing method. Depending on the method, the induced eddy currents are concentrated on a more or less thin layer close to the surface. The strongest eddy currents flow directly at the surface. Therefore, the maximum test sensitivity can be achieved there.

What are probes?

The art of probes development consists in the realisation of a sensor construction that brings the required magnetic field (and thus the eddy current field) to the ‚test location‘ in the workpiece with the required test frequency, in the optimum alignment and required strength, while always minimising undesirable effects as far as possible.

Which probes are used?

Basically, there are two main groups of probes: flow sensors and tactile probes. In the case of through-flow probes, a distinction is made between: External pass-through sensor, which encloses the test object and is guided through it (e.g. rod testing with comprehensive test coils) and internal pass-through sensor, which is enclosed by the test object, i.e. the sensor is guided through the test object (e.g. in internal pipe testing). Pass-through sensors always detect a complete circumferential section of the test object, outside or inside.

What test frequency is needed?

When selecting the test frequency for eddy current testing, consider the specific requirements of the application and the sensor to be used. The recommended frequency range for the sensor should be taken from the manufacturer’s sensor data sheet.

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