The VMS808-21-50-00-00 eddy current proximity sensor uses the eddy current effect to achieve non-contact detection of metal objects. It accurately adapts to shaft speed, zero speed, or key phase monitoring for fans and pumps, providing data for predictive maintenance.

 

The VMS808-21-50-00-00 sensor probe has a built-in high-frequency oscillating coil. When a high-frequency current is passed through it, an alternating magnetic field is generated. When a metal object (such as a gear or keyway on a fan shaft) approaches the probe, the magnetic field induces eddy currents on the metal surface. The reverse magnetic field generated by these eddy currents weakens the original magnetic field, causing the coil impedance to change. The sensor detects this impedance change and converts it into a standard electrical signal for output. The advantages of this non-contact design include: no direct contact with the metal object being measured, preventing mechanical wear, adapting to the high-speed rotation conditions of fans and pumps, and providing a long service life. Detection is also unaffected by oil and dust. Power plant fans and pumps often operate in an oily or dusty environment, which can easily cause traditional contact sensors to fail due to contamination. However, the VMS808-21-50-00-00 eddy current sensor's probe has no contact with the object being measured, so contamination does not affect magnetic field sensing.

 

For speed and zero-speed detection, the VMS808-21-50-00-00 proximity sensor calculates speed based on the number of teeth on a metal geared disc. No pulse output occurs at zero speed, enabling zero-speed monitoring. Key phase detection identifies specific keyways on the shaft and outputs synchronized pulses, providing a phase reference for vibration analysis. These features provide critical data for predictive maintenance of equipment, such as determining equipment jams based on speed fluctuations and locating faults by correlating key phase signals with vibration data.

 

YOYIK has been deeply involved in the field of power plant spare parts manufacturing for many years, taking technological innovation as the core driving force, and constantly launching new products to adapt to market changes. The company not only has advanced production equipment, such as CNC lathes, machining centers, etc., but also has established a strict quality management system to ensure that every product shipped meets the highest industry standards. From turbines to coal-fired generators, YOYIK's products are widely used in many key engineering projects at home and abroad, contributing to the sustainable development of the energy industry.

 

Yoyik can offer many spare parts for power plants as below:

 

PROXIMITY SENSOR VMS808-21-50-00-00

Speed digital display instrument WZ-3C-A2-B134-C1

proximity device CP-3600S

pressure transducer transmitter HR307 HHCC

Turbine bolt electric heating rod ZJ-20-T19

active wheel speed sensor CS-3-M16-L100

Ammeter ESS960I

DIFFUSION TUBING HYDRAZINE A-82250100

Transmitter GP2A2B21AB4M5D1

Magnetc Spd Pckup Sensor SZCB-01

Differential Pressure Switch 403216-29QL14

transmitter LJB1-1000A/10V

CV LVDT Sensor C9231119

sensor CS-1-G-065-02-01

Eddy Current Sensor PR6424/011-030

LVDT Sensor TDZ-1C-03

Turnbuckle XY2CZ404

Pressure Switch AB700-HB33Z1

LVDT SENSOR TD-1-0100-10-01-01 0-100mm

temperature sensor WZPK2-08

LVDT Sensor HDC485-250-10

Steam turbine bolt electric heating rod ZJ-20-3R

Eddy Current Sensor PR6422/002-121

Eddy Current Signal Converter CON041/913-040

Intelligent flame detection signal processor IFD120

Voltage transducer WBV414S01

Magnetic Pickup Speed Rotation Measurement Sensor Monitor DF9032

Ammeter ESS960I

UPS SURT15KUXICH

Screen controller UPHW-1-90T 230V/0Hz

lvdt encoder 191.36.09.07

transmitter LJB1 2000A/10V

Digital temperature measuring instrument 3T-1

Ignition gun EHE-20-B-1-18H-MIP56L=4280

position detection sensor HL-6-100-15

POSITIONER EPOS 1436

AC Current Transducer YPD-I-A2-P5-04-ZS

Position feedback transmitter JNJVS4300-250 

PROXIMITY SENSOR VMS808-21-50-00-00

 

speed sensor CS-3-M10-L60

FAN, SUB OM-8190

Main control board APF2.820.117A-A

Surface thermal resistance SYRPT205205000

Intermediate relay UEG/A-1H1D/110VDC

speed sensor CS-1H-G-075-02-02

low power electric heater Φ12X350

Photoelectric converter EMC-02

TRANSMITTER AMPLIFIER GAP SEAL APH GJCD-16

absolute expansion sensor TD-2Y-80

TRANSMITTER AMPLIFIER GAP SEAL APH GJCT-15-E

Rotor Position proximity Sensor Extension Cable ESY-80

ALARM SIRINE - WARN ING HORN TGSG-06C

LVDT sensor 4000td-xc3

speed sensor CS-1-UNF-080-03

turck linear position sensor 5000TDG 0-250mm

thermocouple SYWRNK2-231-S17

High energy igniter DKGP-20

Magnetic speed sensor DYNALCO M180

Excitation power cabinet fan box GES6630

industrial dial thermometer WSS-11

BRAUN MONITOR MODULE E1668

use of lvdt sensor TDZ-1-32-WF

Electric heater DJ-22-6

Differential Pressure Transmitter 3051CD2A02B1BH2K5DF

Eccentricity monitor A6220

Actuator AOX-080

bolt heater DJ-22-11

Steam Turbine Speed Probe NE6103

Bolt electric heating rod ZJ-21-2(R)

Sensor 450DR-2244-0100

Heat Exapansion Transmitter TD-20-50MM

Eddy Current Sensor PR6422/000-130

GAUGE LEVEL MAGNETIC UHZ-51/1-Z/A-S27*3-III-10-800-735-D

Hall Speed Sensor CS-1 G-100-02-01

variable displacement transducer DET-25A

Bolt electric heating rod ZJ-20-36

PROXIMITY SENSOR VMS808-21-50-00-00

 

DFYLMY-2025-10-11-A