July 14, 2010 - Micro-Epsilon’s Embedded Coil Technology (ECT) enables the previous limitations of using eddy current sensors to be overcome. Due to its ultra-compact design and by using new inorganic materials in its construction, eddyNCDT ECT sensors provide almost unlimited scope in terms of the external design and geometrical shape of the sensor. This means 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 OEMs and machine builders.
The sensors are also suitable for harsh operating environments, including high vibration, impact shocks and high operating temperatures as high as 350 deg C. Sensors have been produced with extremely low thermal drift and with temperature errors of less than 20ppm/K (parts per million per degree Kelvin). As well as eddy current sensors, 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 an extremely stable carrier material, significantly better temperature stability can be achieved compared to conventional capacitive displacement sensors.
CapaNCDT ECT sensors can withstand operating temperatures as high as 200 deg C, as well as very low temperatures down to –269 deg C. 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.
