Eddy current sensor is an inductive transducer, which is used in linear displacement and vibration measurement. Measuring range 50mm, probe diameter 60mm, selectable output signal 0～5V/10V voltage, 4～20mA current or RS485, maximum working current 45mA, non-contact type measurement, small size, easy use, reliable manufacturer, reasonable price.

Applications: By measuring the relative position of the measured metal object and the probe end, eddy current displacement sensor senses and processes it into corresponding electrical signal output. Eddy current displacement transducer adopts non-contact measurement, which can work reliably for a long time, has high sensitivity, strong anti-interference ability, fast response speed, and is not affected by media such as oil and water. Eddy current displacement sensors are widely used in long-term real-time monitoring of shaft displacement, shaft vibration, shaft speed and other specifications of large rotating machinery, and are extended to satellite launch, material identification, weighing measurement, metal plate thickness measurement, material deformation and other application fields.

Specification

Eddy Current Action Principle Diagram (Unit: mm)

 Eddy Current Displacement Sensor Probe Structure & Dimension Diagram (Unit: mm)

Note: The shell of the eddy current displacement sensor probe is used to connect and fix the probe head, and is used as a clamping structure when installing the probe. In order to adapt to different applications and mounting occasions, the probe shell has different types and different threads and size specifications.

Eddy Current Displacement Sensor Proximitor Shell Dimension Diagram (Unit: mm)

The proximitor is the signal processing center of the entire eddy current sensor system. On the one hand, the proximitor provides high-frequency AC excitation current for the probe coil to make the probe work. On the other hand, through a special circuit, the proximitor senses the change in the gap between the probe head and the metal conductor. After being processed by the proximitor, a voltage or current output signal that changes with the linear change of the gap is generated.

Tips: Influence of external magnetic field on eddy current displacement sensor.

Eddy current displacement sensor is an inductive sensor. Since its main action principle is the eddy current effect, the influence of external magnetic fields should be fully considered in engineering applications. A strong external magnetic field will affect the performance of eddy current displacement sensor.

For the external static magnetic field, since the intensity of the static magnetic field is constant, the direction and the eddy current magnetic field may show various conditions. Once direction of the external static magnetic field is determined, its interference to the eddy current magnetic field is also certain. Therefore, in actual engineering applications, sensitivity of the eddy current displacement sensor can be measured through field tests. Eliminate the influence of static magnetic field through subsequent circuits or software algorithms.

For external alternating magnetic fields, such as large exciters, large motors that are frequently started, starters, etc., the direction and intensity of magnetic field may not be a certain value. Therefore, the amount generated keeps the eddy current displacement sensor away from the range of the alternating magnetic field, or adopts magnetic field shielding measures to minimize the impact.