- May 17, 2010
- Micro-Epsilon GmbH & Co. KG
May 17, 2010 - A unique range of displacement measurement sensors has been developed, which combines the robustness and proven measurement performance of eddy current sensor technology with the latest printed coil and permanent magnet technology. Micro-Epsilon’s mainSENSORs family of Magneto-inductive displacement sensors not only benefit from having an extremely compact design relative to their measuring range, but also offer OEMs an attractive price-performance ratio for mid-to-high volume applications. At the core of this sensor technology is Micro-Epsilon’s proven eddy current sensor technology, which provides the sensor with robustness, high speed and high resolution measurements. However, it is how Micro-Epsilon has applied and combined this proven technology to the sensor that provides users with several technical advantages. As well providing a simplified displacement measurement technique, the sensor also offers extremely high basic sensitivity and excellent temperature stability (low thermal drift). In contrast to the widely used Hall Effect measuring principle, mainSENSOR uses Micro-Epsilon’s unique, patented measuring method, which is based on a linear relationship between the position of the permanent magnet and the output signal. Due to its in-house mechanical and electronics manufacturing capabilities, Micro-Epsilon has been able to produce the complete sensor without having to rely on any external sub-component suppliers. The underlying functioning principle of the sensor is based on a coil, which is supplied with alternating current, resulting in a primary magnetic field. According to the Maxwell formula, this magnetic field induces eddy currents in the electrically conductive material arranged opposite the coil. In the field of the eddy current sensor is a special film, which attenuates the eddy current sensor depending on the strength of the magnetic field. Using this method, a linear relationship between the distance to the magnet and the output signal can be established. As printed coils can be used inside the sensor, manufacturing does not rely on any semiconductor processes. The first standard industrial sensor in the mainSENSORs family is the MDS-40 M30, which has a 40mm measuring range and an M30 cylindrical, barrel-type stainless steel housing. The alternative to this is the OEM version, the MDS-40MK, a miniature flat rectangular PCB version with a plastic housing and a 40mm measuring range. The signal output provides 4-20mA or 2-10V DC.