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Micro-Epsilon has introduced its Embedded Coil Technology (ECT), which is intended for use with eddy current and capacitive displacement sensors for aerospace and other sectors.

These new manufacturing methods enable a variety of custom sensors to be produced that are not only capable of operating in higher temperatures but that also benefit from low thermal expansion (thermal drift) and compact conditioning electronics.

The new ECT overcomes the previous limitations of using eddy current sensors, according to the company.

Thanks to its ultra-compact design and by using new inorganic materials in its construction, the new EddyNCDT ECT sensors provide almost unlimited scope in terms of the external design and geometrical shape of the sensor.

This means that the sensors can be adapted to suit virtually any application requirements.

EddyNCDT ECT sensors offer extreme mechanical robustness, resulting in longer service intervals and higher temperature stability.

In addition, the complete circuit electronics can now be integrated into the sensor itself, providing an even more compact measurement solution for original equipment manufacturers (OEMs) and machine builders.

The sensors are also suitable for harsh operating environments, including high vibration, impact shocks and operating temperatures as high as 350C.

Sensors have been produced with extremely low thermal drift and with temperature errors of less than 20ppm/K.

Chris Jones, managing director at Micro-Epsilon, said: ’ECT has enabled us to produce custom-specific designs for OEMs.

’ECT eddy current sensors are already being used in a variety of applications, including the alignment of mirror segments on giant reflector telescopes; for use in ultra-high vacuums or clean rooms in semiconductor manufacturing; and for measuring the grinding gap on refiners used in paper mills.

’We are also developing specific solutions for the aerospace and defence sector.

’We were able to develop extremely compact electrical circuits, which allowed us to manufacture the sensor with integrated electronics in the sensor head.

’We are therefore able to produce a single- or multiple-sensor channel arrangement in one sensor body,’ he added.

Micro-Epsilon has also designed capacitive displacement sensors that make use of ECT.

The CapaNCDT ECT sensors are manufactured using a new type of production process.

Similar to the eddy current ECT method, by embedding the electronic components in a stable carrier material, better temperature stability can be achieved compared with conventional capacitive displacement sensors.

CapaNCDT ECT sensors can withstand operating temperatures as high as 200C, as well as very low temperatures down to -269C.

Similar to EddyNCDT ECT sensors, the capacitive versions are extremely compact.

Micro-Epsilon’s CapaNCDT CSH-FL, for example, has an installation height of just 4mm.


With over 45 years experience and more than 15,000 customers worldwide, Micro-Epsilon understands the need for accurate, robust, intelligent sensors and measurement systems.

With over 45 years experience and more than 15,000 customers worldwide, Micro-Epsilon understands the need for accurate, robust, intelligent sensors and measurement systems.

If you are measuring any type of displacement / position, temperature, speed or colour parameters, Micro-Epsilon sensors and systems provide market-leading performance, together with the fastest measuring rates, highest operating temperature ranges and smart interface capabilities. From simple, low cost sensors to high volume, customer-specific OEM solutions, Micro-Epsilon will have athe correct measurement solution for your application.

Using both contact and non-contact measurement techniques, Micro-Epsilon boasts one of the largest ranges of displacement sensors including 1D, 2D & 3D laser optical, confocal chromatic, eddy current, capacitive, inductive, draw-wire and time-of-flight technologies. Measuring ranges are from nanometers to kilometers!

For temperature measurement, there is a comprehensive range of non-contact infrared temperature sensors and thermal imaging cameras capable of measuring up to that include intelligent software packages to support configuration, analysis and management during the application. LED analysers, fibre optic sensors and Colour recognition sensors measure true colour using L*A*B and CIE.

Micro-Epsilon sensors are used throughout almost all industries: from automotive to aerospace, motorsport to metal production, semiconductor to subsea. Whether it’s an R&D, test, inspection, OEM or a process control application, Micro Epsilon measurement engineers can provide the right measurement solution.

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