Bently Nevada 22810-03-08-10-02 Eddy Current Proximity Probe Product Specification
22810-03-08-10-02 is a standard 8mm eddy-current proximity probe manufactured by Bently Nevada, designed based on eddy current induction principle for non-contact online measurement of rotating equipment shaft radial vibration, axial displacement and rotor clearances. Working together with matched calibrated extension cable and dedicated proximitor signal conditioning module, this probe converts tiny gap variation between stainless steel probe tip and conductive metal target into continuous linear DC analog signal and transmits measurement data to rack monitoring system of 3300,7200 or 3500 series. Widely installed on steam turbines, gas turbines, centrifugal compressors, large generators and industrial high-speed pumps in petrochemical, thermal power, metallurgy and coal chemical industries to realize real-time equipment condition monitoring, pre-alarm and emergency trip protection for critical rotating machinery. Every finished probe completes full linearity calibration, high-low temperature cycling aging test, insulation and sealing inspection before factory delivery to maintain stable measuring accuracy under oil mist, high temperature and complex electromagnetic interference field environment.
Description
Bently Nevada 22810-03-08-10-02 Eddy Current Proximity Probe Product Specification
1. Product Overview
22810-03-08-10-02 is a standard 8mm eddy-current proximity probe manufactured by Bently Nevada, designed based on eddy current induction principle for non-contact online measurement of rotating equipment shaft radial vibration, axial displacement and rotor clearances. Working together with matched calibrated extension cable and dedicated proximitor signal conditioning module, this probe converts tiny gap variation between stainless steel probe tip and conductive metal target into continuous linear DC analog signal and transmits measurement data to rack monitoring system of 3300,7200 or 3500 series. Widely installed on steam turbines, gas turbines, centrifugal compressors, large generators and industrial high-speed pumps in petrochemical, thermal power, metallurgy and coal chemical industries to realize real-time equipment condition monitoring, pre-alarm and emergency trip protection for critical rotating machinery. Every finished probe completes full linearity calibration, high-low temperature cycling aging test, insulation and sealing inspection before factory delivery to maintain stable measuring accuracy under oil mist, high temperature and complex electromagnetic interference field environment.
2. Part Number Coding Definition
The five-segment part number 22810-03-08-10-02 follows Bently’s unified probe coding rule. 22810 represents core 8mm standard proximity probe product platform of classic transducer series; the first suffix digit group 03 stands for customized probe thread specification and mounting body dimension; 08 defines effective linear measuring range configuration matched with 8mm sensitivity parameter; 10 indicates total factory-fixed finished cable length of 10 meters; final code 02 refers to standard FEP insulated unarmored coaxial cable structure with gold-plated micro ClickLoc coaxial connector at cable terminal. Other suffix variant models with different coding combinations have different thread size, cable length or armored cable configuration and cannot be directly replaced on-site, improper substitution will break original factory calibration data and cause measurement drift or protection malfunction.
3. Core Product Features
Probe sensing head and mounting stud adopt integral AISI304 stainless steel one-piece processing with high mechanical strength and outstanding corrosion resistance against lubricating oil, weak acid mist and water vapor in bearing housing cavity. Internal coil is wrapped with multi-layer high-temperature composite insulation and fixed by high-temperature epoxy filling to eliminate internal air gap and avoid coil displacement or inter-turn short-circuit caused by long-term mechanical vibration and ambient temperature fluctuation. Adopting 75-ohm impedance standard coaxial cable with FEP outer insulation, the cable owns excellent high-temperature resistance and anti-interference performance to guarantee complete signal transmission in long-distance wiring up to 305 meters maximum layout distance. Whole probe system completes factory unified calibration matching, only paired with original designated extension cable and corresponding proximitor can keep rated linearity and sensitivity; built-in structural anti-loose design prevents mounting thread loosening induced by long-term equipment runtime vibration.
4. Electrical and Calibration Technical Parameters
Matched working power supply is -17.5VDC ~ -26VDC negative DC power supplied by supporting proximitor module, standard rated operating voltage is -24VDC. Factory preset fixed system sensitivity is 7.87V/mm (200mV/mil) with overall linearity error controlled within ±5% in full effective measuring span; recommended installation static pre-gap voltage is around -9VDC corresponding to about 1.27mm installation clearance between probe tip and target metal surface. Valid linear measuring range covers 1.27mm ~ 9.27mm adapting regular shaft vibration and axial position monitoring of most industrial rotating equipment; frequency response range is DC to 10kHz (-3dB tolerance), meeting collection requirement of low-frequency thermal expansion drift and high-frequency dynamic shaft vibration signals. Minimum effective target diameter is 15.2mm, applicable target material is standard carbon steel like AISI4140; maximum working current consumption of single probe is below 12mA under normal operating condition.
5. Environmental Performance Specification
Allowable continuous operating temperature of probe sensing part ranges from -35℃ to +120℃ to adapt high-temperature installation near turbine bearing pedestals and equipment cylinder casings; spare storage ambient temperature is -55℃ ~ +85℃ under dry non-condensation space without corrosive gas and conductive dust accumulation. Applicable working relative humidity is 5%RH~100%RH, the probe can resist short-time condensation environment but forbids long-term soaking in liquid oil or water; vibration withstand range covers 10Hz~2kHz to adapt continuous vibration environment of adjacent running rotating machinery. For installation position above 1000 meters altitude, shorten regular inspection cycle appropriately to check cable insulation aging and thread fastening condition periodically.
6. Installation & Routine Maintenance Instruction
Complete power cut-off of matched monitoring system before field installation, fix probe onto pre-processed mounting bracket or bearing housing reserved threaded hole with standard tool to set specified pre-installation clearance and lock fastening nut to prevent loose during equipment operation. Separate probe signal cable from high-current power cable wiring trench during cabling construction to reduce cross electromagnetic coupling interference from frequency converter and high-power motor power line. In regular equipment maintenance period, regularly check cable outer insulation integrity for crack, oil corrosion and abrasion, clean dust and greasy dirt around probe mounting position. When on-site replacement is needed, only identical full part number 22810-03-08-10-02 spare probe is allowed for direct replacement; non-original substitute with inconsistent coding parameter will invalidate original system calibration and lead to measurement failure of machine protection loop.
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