Bently Nevada 3000-00-48-36-02 Eddy Current Proximity Probe Product Specification
3000-00-48-36-02 is a factory pre-calibrated eddy-current proximity probe belonging to Bently Nevada’s standard 3000 series, manufactured in compliance with API670 specification for rotating machinery TSI supervision and safety protection systems. When assembled with factory-certified matching extension cable and corresponding compatible proximitor transducer, this unit forms a complete closed-loop non-contact displacement measurement system. It converts tiny clearance variations between flush sensing face and metallic rotating shaft into proportional linear DC voltage signals to achieve continuous online monitoring of radial shaft vibration, axial thrust displacement and Keyphasor rotational speed. The probe is extensively applied on critical rotating equipment including steam turbines, centrifugal compressors, turbo generator sets, boiler feedwater pumps and industrial blowers within thermal power, petrochemical refining and metallurgical processing industries. Every finished probe undergoes strict factory capacitance matching test, electrical continuity inspection, alternating high-low temperature cycling aging test and connector sealing durability verification before shipment to guarantee stable linear performance and consistent measuring accuracy under complicated industrial environments with fluctuating ambient temperature, heavy lubricating oil mist and complex on-site electromagnetic interference. All collected measurement signals are transmitted to Bently 3500 monitoring rack, field DCS or PLC control system to trigger pre-alarm notification and emergency trip interlock, preventing severe catastrophic mechanical damage caused by excessive rotor offset or abnormal vibration amplitude.
Description
Bently Nevada 3000-00-48-36-02 Eddy Current Proximity Probe Product Specification
1. Product Overview
3000-00-48-36-02 is a factory pre-calibrated eddy-current proximity probe belonging to Bently Nevada’s standard 3000 series, manufactured in compliance with API670 specification for rotating machinery TSI supervision and safety protection systems. When assembled with factory-certified matching extension cable and corresponding compatible proximitor transducer, this unit forms a complete closed-loop non-contact displacement measurement system. It converts tiny clearance variations between flush sensing face and metallic rotating shaft into proportional linear DC voltage signals to achieve continuous online monitoring of radial shaft vibration, axial thrust displacement and Keyphasor rotational speed. The probe is extensively applied on critical rotating equipment including steam turbines, centrifugal compressors, turbo generator sets, boiler feedwater pumps and industrial blowers within thermal power, petrochemical refining and metallurgical processing industries. Every finished probe undergoes strict factory capacitance matching test, electrical continuity inspection, alternating high-low temperature cycling aging test and connector sealing durability verification before shipment to guarantee stable linear performance and consistent measuring accuracy under complicated industrial environments with fluctuating ambient temperature, heavy lubricating oil mist and complex on-site electromagnetic interference. All collected measurement signals are transmitted to Bently 3500 monitoring rack, field DCS or PLC control system to trigger pre-alarm notification and emergency trip interlock, preventing severe catastrophic mechanical damage caused by excessive rotor offset or abnormal vibration amplitude.
2. Part Number Coding Definition
The five-segment part number follows Bently standardized modular coding rules with fixed parameter definition for each segment:3000 represents core series designation for proximity probe with 11mm outer body diameter and standard M14×2 mounting thread, factory preset fixed sensitivity of 3.94V/mm and compatible with Bently 3300 and 3500 series proximitor transducers.00 means zero exposed unthreaded sensing tip length; the probe detection surface is flush with the end plane of mounting thread without any protruding bare tip, designed for flush mounting on compact bearing housings where protruding probe tip is prohibited inside lubrication cavities.48 defines total stainless steel probe housing length of 480 millimeters, customized for deep installation cavities on thick heavy-duty equipment bearing casings.36 specifies factory pre-integrated built-in probe cable length of 3.6 meters; this fixed cable length is fully incorporated into total loop capacitance calculation together with matched extension cable and supporting proximitor, arbitrary on-site cutting or replacement with unmatched cable will break original impedance matching and result in measurement zero drift and non-linear output error.02 indicates standard cable and terminal configuration: non-armored fluoropolymer outer cable jacket fitted with gold-plated standard ClickLoc stainless steel threaded connector at cable end, without additional external metal armor sheath or customized modified plug structure. All mechanical and electrical parameters are locked after factory production and cannot be altered arbitrarily on installation site.
3. Mechanical and Raw Material Specifications
The probe’s internal sensing coil core is fabricated from high-precision temperature-stable alloy material and wrapped with high-temperature resistant modified PPS insulating layer, featuring steady dielectric constant, excellent lubricant oil resistance and anti-corrosion capability to maintain fixed capacitance value amid variable ambient temperature and persistent workshop oil mist. Probe outer housing adopts precision CNC-machined solid stainless steel with outstanding mechanical shock resistance, rust-proof property and high-temperature steam erosion tolerance for long-term service near hot-running equipment casing. Internal signal transmission conductors are constructed with multi-strand oxygen-free copper to minimize high-frequency signal attenuation and improve anti-RFI interference performance during signal delivery. Intermediate insulating layer is made of fluoropolymer material with consistent dielectric property that satisfies the operating principle of eddy-current measurement. Outer protective jacket of integrated cable is composed of wear-resistant thermoplastic elastomer to defend against mechanical scratch, dust accumulation and lubricant soaking erosion on site. 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 penetrating into internal wiring junction after mating with matched extension cable terminal. The integral cable maintains appropriate flexible bending property to facilitate convenient routing along equipment surface and cable trench without insulation cracking under specified minimum bending radius.
4. Electrical Performance and Environmental Working Parameters
This proximity probe must be matched with designated compatible 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-calibrated fixed sensitivity of 3.94V/mm, with effective working frequency response spanning from 0Hz up to 10kHz to cover 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 layout and high-temperature installation nearby hot turbine and compressor bearing housings; recommended dry storage temperature is controlled within -55℃ ~ +95℃ under fully non-condensing storage surroundings. Applicable working relative humidity is limited between 5%RH and 95%RH with no internal condensation allowed inside probe body and cable structure to avoid insulation degradation and inner core short-circuit fault. For installation sites above 1000 meters altitude, properly shorten regular inspection cycle to compensate heat dissipation reduction caused by thin atmospheric air. The probe can withstand regular industrial ambient vibration of 10Hz~60Hz; long-term continuous service in environments filled with strong corrosive chemical gas and uninterrupted hot steam immersion is strictly prohibited to extend operational service life of all internal components.
5. Application Scope and Daily Maintenance Guidance
3000-00-48-36-02 flush-type proximity probes are widely mounted on bearing pedestals of large-scale rotating equipment for TSI protection system configuration in power plants, oil refineries and heavy metallurgy projects, collecting real-time shaft clearance and vibration data to realize abnormal equipment condition alarming and unit emergency shutdown interlock protection, effectively preventing severe mechanical faults triggered by excessive rotor displacement or abnormal vibration amplitude.
During routine field maintenance work, operators need periodic visual inspection of probe housing integrity, outer cable jacket abrasion status and connector fastening tightness to eliminate intermittent signal loss induced by loose connection or jacket rupture leading to oil infiltration inside internal wiring. For breakdown spare replacement, only spare probe with identical full complete part number specification is allowed for direct swap; mismatched flush tip design, housing dimension or built-in cable length will alter total loop capacitance and result in monitoring data distortion and invalid measured values. All alternative replacement probes complete full electrical parameter recalibration and alternating high-low temperature cycling aging test in accordance with original factory technical standards before outgoing delivery to guarantee full interchangeability during equipment overhaul and spare part replacement.
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