EDDYLAB GMBH - Sensors with performance

With an extended measuring range up to 45mm, the new eddy current sensor series completes the product portfolio of eddylab GmbH and at the same time combines all advantages of a non-contact eddy current measuring principle: With wear-free distance and displacement measurement, eddy current sensors are characterized by highest precision and dynamics. The new T14/T20/T40 series can withstand extreme temperatures in a range of -40...+150 °C without any problems and is insensitive to external influences such as dirt and dust. The new sensors with measuring ranges between 14 mm and 45 mm are also extremely compact and robust. This makes them ideal for use in difficult industrial environments or vibration measurements with larger amplitudes. Together with the TX electronics from eddylab GmbH and the eddy current software eddyMOTION, measurement data can be analyzed, visualized, and documented.

The CM-Sensors are specially designed for demanding applications: They withstand high pressures up to 100 bars (and more) at temperatures up to 190 °C. At conventional sensors with a similar size the probe head must be kept free from surrounding conductive objects, in order to avoid pre-attenuation of the measuring system. In contrast, the socket for the CM-sensor does not require additional notches or holes.This feature arises from the utilization of zirconium oxide as housing material and ferritic components with a focusing effect. The CM-sensor is typically applied to monitor the orbit of a turbocharger’s shaft.Its ball bearings have a squeeze film damper to reduce the rotor vibration. In order to optimize the entire system the CM-sensors detect the exact position of the turbine- and compressor wheel under real operating conditions.

■ 1 and 2 channel drivers ■ Sensor protection class IP68 ■ Driver protection class IP40 or IP68 ■ Analog output ■ Low current consumption ■ High dynamics ■ High electromagnectic immunity

■ Measuring on turbo vanes and shafts ■ TTL output for speed measurement ■ Analogue monitor output for gap control ■ High resolution ■ High dynamics ■ Low current consumption ■ High noise immunity

eddyMOTION is a Windows-based analysis and configuration tool for eddy current probes. In combination with the TX electronics from eddylab GmbH, the software tool combines several performance features: The functional areas oscilloscope, FFT analysis, data logger and waterfall diagram, enables the visualization and documentation of mechanical movements. eddyMOTION also suites the on-site linearization of eddy current sensors in a traceable manner, without external assistance. In addition to the TX electronics and an eddylab eddy current sensor, a reference probe is required for this purpose: Together with the eddy current sensor, this probe measures the distance to the same material, with the reference probe serving to check the sensor.

The SM series offers ultimate reliability and precision in a small size, and is designed for industrial and lab use. With a measuring range from 2 up to 200 mm and various configuration options (mechanics, protection class, temperature range, linearity) the SM series ensures to have a suitable measuring system for every application. ■ High precision and linearity ■ Various configuration options ■ Push-rod guided and unguided, spring loaded ■ Stainless steel housing ■ Linearity up to 0,10 % ■ Measuring range 2...200 mm

The SL series offers ultimate reliability and precision in a small size, and is designed for industrial and lab use. The sensors can also be used under water because of their high protection class and the stainless steel housing. ■ Measurement ranges 10...600 mm ■ Housing ø20 mm ■ Linearity up to ±0,10 % of full scale ■ Protection class IP67, optional IP68 ■ Sensor working temperature up to 200 °C ■ External, or cable electronics with cable break detection ■ Customized versions available ■ Predestined for use in harsh industrial enviroments

Based on the SL series, the SLT probes are also characterized by an ultra robust construction and a fully stainless steel housing which makes them suitable for harsh environments. The combination of a hardchrome plated shaft with 6 mm in diameter and precision bearings guarantees highest resistance to lateral forces on the push rod. There are three different functional variants available to meet the demands of most measuring tasks: ■ Spring loaded mechanism: The push rod is fully extended by an internal spring. ■ Pneumatic version 1: The push rod extends by applying pressurized air. An internal spring retracts the push rod after releasing the pressure. ■ Pneumatic version 2: The push rod retracts by applying pressurized air. An internal spring extends the push rod after releasing the pressure. Each sensor requires a carrier frequency measuring amplifier to operate, which evaluates and transforms the sensors signal to a standardised analog output signal of 0...10 V or 4...

The SLX series is derived from the SL series and has been especially for use in applications in the pharmaceutical, medical and food industries. To reduce machine downtimes, CIP and SIP ("cleaning in place", "sterilization in place") cleaning and sterilization processes are state of the art today. For this purpose, the machine interior is cleaned thermally and/or chemically with high temperature, pressure and aggressive media. The devices of the SLX series are perfectly equipped for use in this area and guarantee maximum reliability and service life thanks to their extremely robust design, a completely sealed stainless steel housing and high media and temperature resistance. KeyFeatures ■ Measuring ranges 10...300 mm ■ Linearity up to ±0.10 % of measuring range ■ High protection class IP68/IP69K ■ Operating temperature sensor up to 200 °C ■ High resistance to aggressive media ■ Customized designs

he greatest challenge in the use of inductive displacement transducers is the optimization of linearity. Usual linearity deviations are around 0.30 % of the measuring range of the sensors. Values that are significantly below this can hardly be realized. With the help of the LVDT digital controller from eddylab, to which either one or two sensors can be connected, the linearity deviation of inductive displacement transducers can be almost completely eliminated. KeyFeatures ■ Improves linearity up to 0.01%. ■ High resolution (16 bit) ■ High dynamic range ■ Digital output CAN, USB interface ■ Analog output ■ High noise immunity