Bently Nevada 30000-00-48-36-01 Eddy Current Proximity Probe Product Specification
30000-00-48-36-01 is a factory pre-calibrated flush-type eddy-current proximity probe from Bently Nevada’s 30000 series, manufactured in compliance with API670 industrial specification for TSI rotating machinery supervision and safety protection systems. When matched with factory-certified paired extension cable and compatible proximitor transducer, the unit forms a complete closed-loop non-contact displacement measurement circuit. Based on eddy current induction principle, it converts subtle clearance variations between flush sensing end face and metallic rotating shaft surface into proportional linear DC voltage signals to realize continuous online measurement of radial shaft vibration, axial thrust displacement and Keyphasor rotational speed. This sensing unit is widely deployed on critical high-speed rotating equipment including steam turbines, centrifugal compressors, turbo-generator sets, boiler feedwater pumps and industrial blowers across thermal power generation, petrochemical refining and heavy metallurgy industries. Every finished probe undergoes strict factory inspection procedures including full-loop capacitance matching test, complete wiring continuity detection, alternating high-low temperature cycling aging treatment and connector sealing durability verification before outbound delivery, which guarantees consistent linearity and precise measuring performance under complicated harsh industrial conditions featuring drastic ambient temperature variation, dense lubricating oil mist accumulation and complex electromagnetic field interference. All collected analog measuring signals are transmitted to Bently 3500 monitoring rack, on-site 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 30000-00-48-36-01 Eddy Current Proximity Probe Product Specification
1. Product Overview
30000-00-48-36-01 is a factory pre-calibrated flush-type eddy-current proximity probe from Bently Nevada’s 30000 series, manufactured in compliance with API670 industrial specification for TSI rotating machinery supervision and safety protection systems. When matched with factory-certified paired extension cable and compatible proximitor transducer, the unit forms a complete closed-loop non-contact displacement measurement circuit. Based on eddy current induction principle, it converts subtle clearance variations between flush sensing end face and metallic rotating shaft surface into proportional linear DC voltage signals to realize continuous online measurement of radial shaft vibration, axial thrust displacement and Keyphasor rotational speed. This sensing unit is widely deployed on critical high-speed rotating equipment including steam turbines, centrifugal compressors, turbo-generator sets, boiler feedwater pumps and industrial blowers across thermal power generation, petrochemical refining and heavy metallurgy industries. Every finished probe undergoes strict factory inspection procedures including full-loop capacitance matching test, complete wiring continuity detection, alternating high-low temperature cycling aging treatment and connector sealing durability verification before outbound delivery, which guarantees consistent linearity and precise measuring performance under complicated harsh industrial conditions featuring drastic ambient temperature variation, dense lubricating oil mist accumulation and complex electromagnetic field interference. All collected analog measuring signals are transmitted to Bently 3500 monitoring rack, on-site 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 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 fully compatible with Bently 3300 and 3500 series proximitor modules.00 means zero exposed unthreaded sensing tip structure; the probe detecting end face is completely flush with thread terminal surface without any protruding bare sensing rod, specially applicable for bearing housings where extended probe tip penetrating into internal oil chamber is prohibited.48 defines total stainless steel probe housing length of 480 millimeters, customized for medium-depth bore mounting holes on conventional bearing pedestals with regular installation depth requirements.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 preset impedance balance and induce measuring zero drift and non-linear output deviation.01 denotes basic standard connector configuration: non-armored fluoropolymer outer cable jacket fitted with unplated standard stainless steel threaded coaxial connector at cable tail end without gold plating treatment, without additional 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 anti-oil corrosion property to fix internal capacitance value steadily under variable ambient temperature and long-term continuous lubricant mist immersion on production site. Probe outer casing is precision CNC processed solid stainless steel with excellent anti-collision, rust-proof and high-temperature steam resistant capability to sustain long-term mounting adjacent to high-temperature running equipment shell. Internal signal transmission conductors adopt multi-strand oxygen-free copper wire to minimize high-frequency signal attenuation and improve anti-RFI electromagnetic interference capacity during signal delivery. Intermediate insulating layer uses fluoropolymer with uniform dielectric property perfectly matching eddy-current induction operating requirements. Outer protective sheath of integrated cable is wear-resistant thermoplastic elastomer to resist on-site mechanical scratch, dust deposition and lubricant liquid soaking erosion. The tail-end stainless steel connector is equipped with built-in elastic rubber sealing ring to block moisture, fine metal scraps and hydraulic oil from infiltrating into internal wiring after locking connection with matched extension cable connector. The integrated cable keeps proper flexible bending characteristic for neat field wiring within defined minimum bending radius without insulation layer cracking damage.
4. Electrical Performance and Environmental Working Parameters
This proximity probe must cooperate with designated matching proximitor powered by negative DC supply ranging from -17.5VDC to -26VDC. The full measuring loop composed of probe, certified extension cable and supporting proximitor retains 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 adapt low-temperature outdoor field installation and high-temperature layout nearby overheated turbine and compressor bearing housings; dry spare storage temperature is controlled between -55℃ ~ +95℃ under non-condensation storage environment. Applicable working relative humidity is limited within 5%RH ~ 95%RH with no internal condensation permitted inside probe and cable to prevent insulation degradation and inner core short-circuit fault. When installed above 1000 meters altitude, regular inspection cycle shall be shortened appropriately to compensate heat dissipation decline caused by thin atmospheric density. The probe can endure 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 forbidden to prolong service lifespan of all internal core components.
5. Application Scope and Routine Maintenance Guidance
30000-00-48-36-01 medium-length flush-type proximity probes serve as core sensing components of TSI machinery protection system widely mounted on medium-depth installation bearing supports of large critical rotating units across power, petrochemical and heavy metallurgy industries, collecting real-time shaft gap and vibration operational data to realize abnormal working condition pre-alarm and unit emergency shutdown interlock protection, efficiently preventing 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 internal wiring. For fault spare replacement, only alternative 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 replacement spare probes complete full electrical parameter recalibration and alternating high-low temperature cycling aging test in line with original factory standards before outgoing delivery to guarantee full interchangeability during equipment overhaul and component replacement work.
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