Bently Nevada 30000-00-23-18-02 Eddy Current Proximity Probe Product Specification
30000-00-23-18-02 is a factory pre-calibrated flush-type eddy-current proximity probe of Bently Nevada 30000 series, designed and manufactured in accordance with API670 international standard for turbomachinery supervisory instrumentation and rotating equipment protection systems. When matched with factory-certified extension cable and compatible proximitor transducer, the probe forms a complete closed-loop non-contact displacement measurement circuit based on eddy-current induction principle. It converts real-time clearance variations between flush sensing face and metallic rotor surface into linear DC voltage signals to continuously monitor radial shaft vibration, axial thrust displacement and Keyphasor rotational speed. This sensor is widely applied on critical high-speed rotating equipment including steam turbines, centrifugal compressors, turbo-generator sets, boiler feedwater pumps and industrial blowers across thermal power, petrochemical refining and metallurgical industries. Every finished unit passes full-loop capacitance matching test, wiring continuity inspection, alternating high-low temperature cyclic aging and connector sealing durability test before delivery, ensuring stable measuring accuracy under harsh working conditions with fluctuating ambient temperature, heavy lubricating oil mist and complex electromagnetic interference. All analog measured signals are transmitted to Bently 3500 monitor rack, on-site DCS or PLC control system to activate pre-alarm and emergency trip interlock and prevent severe mechanical damage caused by excessive rotor deflection and out-of-limit vibration.
Description
Bently Nevada 30000-00-23-18-02 Eddy Current Proximity Probe Product Specification
1. Product Overview
30000-00-23-18-02 is a factory pre-calibrated flush-type eddy-current proximity probe of Bently Nevada 30000 series, designed and manufactured in accordance with API670 international standard for turbomachinery supervisory instrumentation and rotating equipment protection systems. When matched with factory-certified extension cable and compatible proximitor transducer, the probe forms a complete closed-loop non-contact displacement measurement circuit based on eddy-current induction principle. It converts real-time clearance variations between flush sensing face and metallic rotor surface into linear DC voltage signals to continuously monitor radial shaft vibration, axial thrust displacement and Keyphasor rotational speed. This sensor is widely applied on critical high-speed rotating equipment including steam turbines, centrifugal compressors, turbo-generator sets, boiler feedwater pumps and industrial blowers across thermal power, petrochemical refining and metallurgical industries. Every finished unit passes full-loop capacitance matching test, wiring continuity inspection, alternating high-low temperature cyclic aging and connector sealing durability test before delivery, ensuring stable measuring accuracy under harsh working conditions with fluctuating ambient temperature, heavy lubricating oil mist and complex electromagnetic interference. All analog measured signals are transmitted to Bently 3500 monitor rack, on-site DCS or PLC control system to activate pre-alarm and emergency trip interlock and prevent severe mechanical damage caused by excessive rotor deflection and out-of-limit vibration.
2. Part Number Coding Definition
The five-segment part number follows standardized modular coding specification of the 30000 product series:30000 represents core product series with 11mm outer probe diameter and standard M14×2 mounting thread, factory fixed sensitivity of 3.94V/mm and full compatibility with Bently 3300 and 3500 series proximitor modules.00 stands for zero exposed unthreaded sensing tip; the detecting end face is fully flush with thread terminal surface without protruding probe rod, specially developed for closed bearing housings where tip intrusion into internal lubrication cavity is prohibited.23 defines overall stainless steel probe housing length of 230 millimeters, customized for ultra-shallow installation holes of compact bearing pedestals.18 specifies factory pre-integrated built-in probe cable length of 1.8 meters; the fixed cable length is pre-calculated into full closed-loop capacitance matching together with matched extension cable and proximitor. Random on-site cable cutting or replacement with non-certified cable will break original impedance balance and trigger measurement zero drift and non-linear errors.02 denotes standard cable and terminal configuration: non-armored fluoropolymer outer jacket equipped with gold-plated standard ClickLoc stainless steel threaded coaxial connector at cable tail, without external metal armor or customized plug modification. All mechanical and electrical parameters are fixed after factory calibration and cannot be arbitrarily modified on installation site.
3. Mechanical and Raw Material Specifications
Internal induction coil core is wound with high-stability precision alloy and wrapped with high-temperature resistant modified PPS insulating layer, maintaining constant dielectric property and excellent oil-proof & anti-corrosion performance under long-term lubricant soaking and varying ambient temperature. Probe outer housing adopts precision CNC processed solid stainless steel with outstanding rust-proof, anti-impact and high-temperature steam resistant performance for long-term installation near high-temperature equipment casing. Internal multi-strand oxygen-free copper conductors reduce high-frequency signal attenuation and improve anti-RFI interference capability during signal transmission. Intermediate fluoropolymer insulation matches dielectric requirement of eddy-current operating principle. Outer cable sheath is wear-resistant thermoplastic elastomer against mechanical scratch, dust accumulation and lubricant corrosion. The tail ClickLoc stainless steel connector is fitted with built-in elastic rubber sealing ring to block moisture, fine metal scraps and hydraulic oil from penetrating internal wiring after locking with matched extension cable terminal. The integrated cable maintains proper flexibility and shall be routed above specified minimum bending radius to avoid insulation cracking damage.
4. Electrical Performance and Environmental Working Parameters
This proximity probe must work with matched proximitor powered by negative DC supply ranging from -17.5VDC to -26VDC. The complete measurement assembly of probe, certified extension cable and proximitor keeps factory-calibrated sensitivity of 3.94V/mm, with effective frequency response ranging from 0Hz up to 10kHz for both slow static axial displacement tracking and high-frequency dynamic radial vibration sampling of high-speed rotors.
Permitted continuous operating ambient temperature ranges from -40℃ to +120℃ to adapt low-temperature outdoor installation and high-temperature layout near hot bearing housings of turbines and compressors; dry storage temperature is controlled between -55℃ ~ +95℃ under non-condensing storage environment. Working relative humidity is limited within 5%RH~95%RH with no internal condensation allowed inside probe and cable to prevent insulation degradation and inner core short-circuit. When installed above 1000 meters altitude, shorten regular inspection cycle properly to compensate heat dissipation decline caused by thin air density. The probe withstands conventional industrial vibration of 10Hz~60Hz; long-term continuous operation in strong corrosive gas and uninterrupted hot steam environment is strictly forbidden to extend component service life.
5. Application Scope and Routine Maintenance Guidance
30000-00-23-18-02 ultra-short flush proximity probes are core sensing parts of TSI machinery protection system, widely mounted on ultra-shallow compact bearing supports of large critical rotating equipment in power plants, petrochemical refineries and metallurgical workshops to collect real-time shaft clearance and vibration data for abnormal condition pre-warning and emergency shutdown interlock protection.
During regular maintenance, inspect probe housing integrity, outer cable abrasion and connector fastening tightness periodically to avoid intermittent signal loss caused by loose connection or jacket rupture and subsequent oil infiltration. Only spare probe with identical full part number is permitted for direct replacement; any change of flush tip structure, housing length or built-in cable length will alter total closed-loop capacitance and lead to distorted measurement data. All replacement probes complete full capacitance recalibration and alternating high-low temperature aging test complying with original factory standards before delivery to ensure full interchangeability during equipment overhaul.
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