Bently Nevada 30000-00-08-36-02 Eddy Current Proximity Probe Product Specification
30000-00-08-36-02 is a factory pre-calibrated ultra-short flush-type eddy-current proximity probe from Bently Nevada 30000 series, designed and manufactured per API670 international standard for turbomachinery supervisory instrumentation and rotating equipment protection systems. When assembled with factory-certified matched 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 end face and metallic rotating shaft surface into stable proportional linear DC voltage signals to continuously monitor radial shaft vibration, axial thrust displacement and Keyphasor rotational speed parameters. This compact sensing component is widely deployed on critical high-speed rotating equipment including steam turbines, centrifugal compressors, turbo-generator sets, boiler feedwater pumps and industrial blowers within thermal power generation, petrochemical refining and heavy metallurgy industries. Every finished probe undergoes full-loop capacitance matching test, wiring continuity inspection, alternating high-low temperature cyclic aging treatment and connector sealing durability verification before outbound delivery, which guarantees consistent linear output performance and precise measuring accuracy under harsh industrial working conditions featuring drastic ambient temperature variation, dense lubricating oil mist accumulation and complicated electromagnetic field interference. All collected analog measuring signals are transmitted to Bently 3500 monitoring rack, field DCS or PLC control system to activate pre-warning alarm and unit emergency trip interlock logic, effectively preventing severe mechanical breakdown caused by excessive rotor offset and abnormal vibration amplitude of core rotating components.
Description
Bently Nevada 30000-00-08-36-02 Eddy Current Proximity Probe Product Specification
1. Product Overview
30000-00-08-36-02 is a factory pre-calibrated ultra-short flush-type eddy-current proximity probe from Bently Nevada 30000 series, designed and manufactured per API670 international standard for turbomachinery supervisory instrumentation and rotating equipment protection systems. When assembled with factory-certified matched 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 end face and metallic rotating shaft surface into stable proportional linear DC voltage signals to continuously monitor radial shaft vibration, axial thrust displacement and Keyphasor rotational speed parameters. This compact sensing component is widely deployed on critical high-speed rotating equipment including steam turbines, centrifugal compressors, turbo-generator sets, boiler feedwater pumps and industrial blowers within thermal power generation, petrochemical refining and heavy metallurgy industries. Every finished probe undergoes full-loop capacitance matching test, wiring continuity inspection, alternating high-low temperature cyclic aging treatment and connector sealing durability verification before outbound delivery, which guarantees consistent linear output performance and precise measuring accuracy under harsh industrial working conditions featuring drastic ambient temperature variation, dense lubricating oil mist accumulation and complicated electromagnetic field interference. All collected analog measuring signals are transmitted to Bently 3500 monitoring rack, field DCS or PLC control system to activate pre-warning alarm and unit emergency trip interlock logic, effectively preventing severe mechanical breakdown caused by excessive rotor offset and abnormal vibration amplitude of core rotating components.
2. Part Number Coding Definition
The five-segment part number follows standardized modular coding specification of Bently 30000 series, each segment corresponds to fixed mechanical and electrical parameter definition:30000 stands for core compact product series designation, adopting 11mm outer probe body diameter and standard M14×2 metric mounting thread, factory fixed nominal sensitivity of 3.94V/mm and full electrical compatibility with Bently 3300 and 3500 series proximitor modules.00 defines zero exposed unthreaded sensing tip structure; the probe detecting end face is fully flush with thread terminal surface without any protruding bare sensing rod, specially applicable for compact closed bearing housings where protruding tip penetrating into internal lubrication cavity is strictly prohibited.08 defines total stainless steel probe housing length of 80 millimeters, customized for extremely limited ultra-shallow mounting holes on miniature compact bearing pedestals with narrow installation space.36 specifies factory pre-molded integral built-in probe cable length of 3.6 meters; this fixed cable dimension is pre-calculated into full closed-loop capacitance matching together with matched extension cable and supporting proximitor, random on-site cable cutting or replacement with non-matching spare cable will break original impedance balance and induce measuring zero drift and non-linear output deviation.02 denotes standard cable and terminal configuration: non-armored fluoropolymer outer cable jacket fitted with gold-plated standard stainless steel threaded ClickLoc coaxial connector at cable tail end, without external metal armor sheath or custom modified plug structure. All inherent mechanical and electrical parameters are solidified after factory production and cannot be randomly altered during field installation and commissioning.
3. Mechanical and Raw Material Specifications
The internal sensing winding core is manufactured from high-stability precision alloy material and wrapped with high-temperature resistant modified PPS insulating layer, maintaining steady dielectric constant and outstanding oil-proof & anti-corrosion performance to retain fixed internal capacitance under fluctuating ambient temperature and long-term workshop lubricant mist immersion. Probe outer housing is precision CNC machined solid stainless steel with excellent impact resistance, rust-proof property and high-temperature steam tolerance for long-term installation adjacent to high-temperature running equipment casing. Internal signal transmission conductors adopt multi-strand oxygen-free copper wire to minimize high-frequency signal attenuation and improve anti-RFI electromagnetic interference capability during signal delivery. Intermediate fluoropolymer insulation keeps consistent dielectric property matching eddy-current induction working requirements. Outer cable protective jacket is wear-resistant thermoplastic elastomer to withstand on-site mechanical scratch, dust accumulation and lubricant liquid soaking erosion. The tail-end stainless steel ClickLoc connector is fitted with built-in elastic rubber sealing ring to prevent moisture, fine metal scraps and hydraulic oil from infiltrating internal wiring after locking connection with matched extension cable terminal. The integral cable maintains appropriate flexible bending property for neat field wiring within specified minimum bending radius without insulation layer cracking damage.
4. Electrical Performance and Environmental Working Parameters
This proximity probe must be used together with designated matching proximitor powered by negative DC supply ranging from -17.5VDC to -26VDC. The complete measuring loop consisting of probe, certified extension cable and matched proximitor keeps factory pre-calibrated fixed sensitivity of 3.94V/mm, with effective frequency response ranging from 0Hz up to 10kHz to satisfy both slow static axial thrust displacement tracking and high-frequency dynamic radial vibration sampling of high-speed rotating rotors.
Permitted continuous operating ambient temperature ranges from -40℃ to +120℃ to fit low-temperature outdoor installation and high-temperature layout near hot turbine and compressor bearing housings; dry spare storage temperature is controlled between -55℃ ~ +95℃ under fully non-condensing storage surroundings. Applicable working relative humidity is limited within 5%RH ~ 95%RH with no internal condensation allowed inside probe and cable to avoid insulation degradation and inner core short-circuit fault. When installed above 1000 meters altitude, shorten regular inspection cycle properly to compensate heat dissipation decline caused by thin atmospheric density. The probe withstands conventional industrial ambient vibration of 10Hz~60Hz; long-term uninterrupted service in surroundings filled with strong corrosive chemical gas and continuous hot steam immersion is strictly prohibited to extend service lifespan of all internal core components.
5. Application Scope and Routine Maintenance Guidance
30000-00-08-36-02 ultra-miniature flush-mounted proximity probes are core sensing components of TSI machinery protection system, widely mounted on confined ultra-shallow installation bearing supports of large critical rotating equipment in thermal power plants, petrochemical refineries and heavy metallurgy production bases, collecting real-time shaft clearance and vibration operational data to realize abnormal working condition pre-alarm and unit emergency shutdown interlock protection, efficiently avoiding severe mechanical faults triggered by excessive rotor displacement or over-limit vibration amplitude.
During periodic on-site maintenance activities, field maintenance personnel need regular visual inspection on probe housing integrity status, outer cable jacket abrasion condition and connector locking tightness, avoiding intermittent signal loss caused by loose connection or jacket rupture followed by oil infiltration into inner wiring. For faulty component replacement work, only spare probe with identical full complete part number specification is allowed for direct swapping; any modification of flush tip structure, housing overall dimension or built-in cable length will change total closed-loop capacitance and result in distorted monitoring data and invalid measured values. All alternative replacement spare probes complete full electrical parameter recalibration and alternating high-low temperature cycling aging test in accordance with original factory standards before delivery to guarantee full interchangeability during equipment overhaul and component replacement work.
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