YD9800 Split Type Proximity Detector

YD9800 Split Type proximity detector 1. Power supply: -18Vdc ~ -24Vdc;+18Vdc ~ +30Vdc; 2. Current output: 4 ~ 20mA

YD9800 Split Type proximity detector can measure the relative position of the measured object (must be a metal conductor) and the probe end. Because of its features of non contact measurement, long-term high working reliability, high sensitivity, strong anti-interference ability, fast response speed and no oil-water and other medium influence, it is often used for long-term real-time monitoring the shaft displacement, shaft vibration, shaft speed and other parameters of the  large rotating machinery, then we can analyze the work condition and failure reason of the equipment, in order to protect the equipment and do predicting repair effectively. It can measure displacement, amplitude, speed  , size, thickness, surface unevenness.  Analysis  on the theory of rotor dynamics and bearing science, the running state of large  rotary machines mainly depends on its core -- r otating shaft, and the eddy current displacement  sensor can measure the  condition o f the shaft directly, the measurement   result is reliable and credible.

Brief Introduction

The leading science and technology of YD9800 series eddy current displacement sensor:

1. “The best parameter matching of coil temperature stability” technology ensures a good stability of probe temperature;

2. Using the new PPS engineering plastics through" two injection" technology to ensure the good sealing of the probe, dimensional stability and exchangeability, working temperature range expanded to -50°C~+175°C;

3. " Deformation connection" technology, higher strength and reliability of probe;

4. “Deep negative feedback stability resonant loop" technology, make the preamplifier stability reach (0.05%/°C, 0.02%/year);

5. According to the American military standard design and produce,  preamplifier can work continuously in the environment of -50~+105°C;

6. Preamplifier circuit adopts the fault-tolerant design to ensure that any wiring errors will not make damage;

7. Preamplifier uses the latest electronic technology; power consumption is lower than 12mA;

8. The shell of the preamplifier adopts die casting technology, high frequency socket concave, wiring terminal mosaic protection and engineering plastics insulated structure, in order to make the preamplifier more solid and more convenient to use and install.

9. Advanced phase frequency characteristics of the testing and control method of the eddy current displacement sensor makes JX20 series products are in the international leading level in the dynamic characteristics.

Application Area

It is widely used for online monitoring and fault diagnosis of displacement, vibration, rotational speed, the oil film thickness of the steam turbine, hydraulic turbine, generators, blowers, compressors, gear boxes and other equipments in the industries of electric power, petrochemical, metallurgical and so on.

Technical Index

Probe: working temperature is -50~ +175°C ; temperature drift ≤0.05%/°C

Preamplifier: working temperature is -50~ +120°C ; temperature drift ≤0.05%/°C

Interchangeability: error ≤5%

Frequency response: 0 ~ 10 kHz; amplitude frequency characteristics: when 1   kHz, it   is -1%;   when 10kHz, it is -5%; phase frequency characteristics: when 1 kHz, it is -1 degree; when 10 kHz, it is -100 degree.

Output characteristics:

1. a negative voltage output,

Power supply: -18Vdc~ -24Vdc

Power consumption ≤ 12mA (not including the output   current)

2.4 ~ 20mA current output

Power supply: +18Vdc~ +30Vdc

Power consumption ≤ 12mA ( not including the output current )

YD9800 Split Type Proximity Detector