YH-DO-A1-B60-D1 eddy current sensor
The JL-70 integrated eddy current sensor sensor is mainly used to measure the static and dynamic distance between the probe and the measured object. The measured object is generally ferrite, the alternating electromagnetic field of the probe is absorbed by the ferrite, and the electronic circuit of the sensor Induce and process this change amount, and then obtain the displacement of the measured object. On-line monitoring of the displacement, vibration, rotation speed, expansion, eccentricity, and oil film thickness of the rotating mechanical shaft system. The measurement of the mechanical size, thickness, and surface roughness of the product.
Industrial process automation limit, counting and other precision control, can be widely used in petrochemical, metallurgy, steel, power, aerospace, pharmaceutical, machinery manufacturing and other industries.
The sensor can dynamically and non-contactly measure the relative vibration displacement (such as shaft vibration, etc.) of the measured metal conductor and the end face of the probe.
The sensor can statically and non-contactly measure the relative displacement (eg axial displacement, differential expansion, etc.) of the metal conductor under test and the end face of the probe.
In engineering vibration, the analysis of the running state and operation failure of rotating machinery and reciprocating operation machinery, vibration monitoring is the most authoritative method, and it is the most timely. The phenomena of imbalance of the rotor, misalignment of the two connected rotors, wear of the bearing, cracking of the shaft and collision and grinding of the rotor blades with the housing are mainly reflected in changes in the amplitude, phase and frequency of the vibration. It is the most critical information and it is easy to measure. YH-DO-A1-B60-D1 eddy current sensor eddy current displacement sensor has a long-term working reliability, non-contact measurement, anti-interference ability, not affected by oil and other media, a wide range of applications, simple structure and so on. It is used for long-term real-time monitoring of shaft vibration, axial displacement, shaft speed, and shell expansion of large rotating machinery, effectively protecting the safe operation of equipment. Trend analysis and fault diagnosis can also be performed on the monitoring data to achieve the purpose of predictive maintenance and troubleshooting. Application of sensors Radial vibration measurement: It can indicate the working condition of the bearing and can measure axial position of mechanical faults such as imbalance of the rotor, misalignment and shaft cracks. It can indicate the wear of the thrust bearing or potential Possibility of bearing failure The average radial position of the shaft in the bearing: It can be used to determine the azimuth angle. It is also an indication of whether the rotational speed is stable and whether the shaft is centered.
Eccentricity: For large and small turbines, it is necessary to measure the bending of the shaft at startup, ie eccentricity.
Phaser signal: It is used to measure the rotation speed and phase angle of the shaft.
Environmental indicators:
Front device working temperature: -40°C～+65°C
Probe and extension cable: -40°C to +125°C
Relative humidity: 95%, non-condensing
CWY-DO eddy current sensor

Probe diameter (mm)
Linear scale
(mm)
Linear starting point
(mm)
Linearity error Minimum measured area diameter
(mm)
Ф5
2
0.25
±1?
Ф12
Ф8
2
0.25
±1?
Ф18
Ф11
4
0.5
±1?
Ф33
Ф25
12.5
0.63
±2?
Ф68
Ф50
25
3.0
±2?
Ф130

qbj-3800XL series eddy current sensor system technical characteristics
1).Temperature stability ● The probe, extension cable, and preamplifier are less affected by temperature, and the performance index is stable;
● The probe coil is made of special alloying elements, and the temperature drift coefficient is small;
● The extension cable is made of rare alloy element material, and the temperature drift coefficient is small;
● The front device is designed with multiple linear/temperature drift compensation circuits.
2).Compatibility and interchangeability QBJ-3800XL eddy current probes, extension cables, and components of the preamplifier are completely interchangeable. The non-linear error after exchange is still better than ±1%, and the sensitivity deviation is better than ± 1%.
3). Anti-corrosion and reliability ● The connecting head of the extension cable and the probe and the front device adopts the locking device structure, which effectively prevents the looseness of the site connector and causes measurement error;
● The connector of the extension cable and probe can be made of stainless steel, which can be used in strong corrosive environments such as chemical industry;
● Vacuum ultrasonic welding technology is used at the probe head coil and cable connection to effectively prevent the aging of the alloy coil joint, which greatly prolongs the service life of the probe.
● The front device has a fault-tolerant protection function to prevent damage to the front device due to incorrect wiring.
● There is a special structure at the end of the armor and at the cable contact to prevent scratching of the cable;
● The probe coil cover adopts the latest PPS engineering plastic (temperature resistance 250°C) and the probe coil injection molding to prevent the coil from loosening and reduce the probe temperature drift coefficient;
● There is a special locking armor structure and sealing device at the joint of the probe and the probe housing, which can effectively prevent the oil from seeping out of the armor and cable or armor and PTFE protection pipe.
The traditional external pre-amplifier and meter part of the filter, signal normalization processing, signal output and other functions of the module, the sensor's differential expansion signal directly converted to output 4-20mA signal. It is matched with the GJ-D10 series of eddy current sensor probes, which eliminates the need for a pre-amplifier and further reduces the number of components to be monitored. Therefore, the reliability is greatly improved. It is widely used in main and auxiliary equipment such as turbines, compressors, fans and pumps. The real-time monitoring of differential expansion of the motor and the like can really protect the equipment. It is accurate, stable and reliable, and has strong anti-interference performance.
Technical parameters QBJ-3800XL-A01 eddy current sensor power supply: +24Vdc, maximum operating current is less than 20mA

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