12.5mm Eddy Current Displacement Sensor, Φ 25mm Probe

Eddy current displacement sensor working at 12.5mm measurement range. Probe diameter 25mm, available output signal 0～5V/10V voltage, 4～20mA current or RS485, corresponding max operation current 45/25/40mA. Eddy current transducer is based on inductive principle, non-contact measuring for linear displacement and vibration.

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.

Details

Tips: Influence of the measured material on eddy current displacement sensor measurement results.

Characteristics of the eddy current displacement sensor are related to electrical conductivity and magnetic permeability of the measured materials. When the measured object is magnetic material (such as ordinary steel, structural steel, etc.), the eddy current effect and the magnetic effect exist at the same time, and the magnetic effect reacts to the eddy current effect, which weakens the eddy current effect. At this time, sensitivity of the eddy current displacement sensor is reduced. When the measured object is a weak magnetic material (such as copper, aluminum, alloy steel, etc.), due to the weak magnetic effect, the eddy current effect is relatively stronger, so the eddy current displacement sensor has a higher induction sensitivity.