Bently Nevada 3000-00-08-18-02 Eddy Current Proximity Probe Product Specification
3000-00-08-18-02 is a factory pre-calibrated eddy-current proximity probe of Bently Nevada’s standard 3000 series, manufactured per API670 industrial specification for TSI rotating machinery supervision and safety protection systems. When matched with factory-certified extension cable and compatible proximitor transducer, the probe forms a complete closed-loop non-contact measurement circuit. It converts tiny clearance changes between flush sensing face and metallic rotating shaft into stable linear DC voltage signals for continuous online monitoring of radial shaft vibration, axial thrust displacement and Keyphasor rotational speed. This sensor is widely deployed on critical 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 factory capacitance matching test, continuity inspection, high-low temperature cycling aging and connector sealing durability test before delivery to guarantee stable linearity and consistent measuring accuracy under complex industrial environments with fluctuating temperature, heavy lubricating oil mist and intensive electromagnetic interference. Measured analog signals are transmitted to Bently 3500 monitoring rack, on-site DCS or PLC control system to trigger pre-alarm and emergency trip interlock, avoiding catastrophic mechanical failure caused by excessive rotor deflection or abnormal vibration amplitude.
Description
Bently Nevada 3000-00-08-18-02 Eddy Current Proximity Probe Product Specification
1. Product Overview
3000-00-08-18-02 is a factory pre-calibrated eddy-current proximity probe of Bently Nevada’s standard 3000 series, manufactured per API670 industrial specification for TSI rotating machinery supervision and safety protection systems. When matched with factory-certified extension cable and compatible proximitor transducer, the probe forms a complete closed-loop non-contact measurement circuit. It converts tiny clearance changes between flush sensing face and metallic rotating shaft into stable linear DC voltage signals for continuous online monitoring of radial shaft vibration, axial thrust displacement and Keyphasor rotational speed. This sensor is widely deployed on critical 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 factory capacitance matching test, continuity inspection, high-low temperature cycling aging and connector sealing durability test before delivery to guarantee stable linearity and consistent measuring accuracy under complex industrial environments with fluctuating temperature, heavy lubricating oil mist and intensive electromagnetic interference. Measured analog signals are transmitted to Bently 3500 monitoring rack, on-site DCS or PLC control system to trigger pre-alarm and emergency trip interlock, avoiding catastrophic mechanical failure caused by excessive rotor deflection or abnormal vibration amplitude.
2. Part Number Coding Definition
The five-segment part number follows Bently standardized modular coding rules with fixed definition for each segment:3000 represents core probe series with 11mm outer body diameter and standard M14×2 mounting thread, factory-set fixed sensitivity of 3.94V/mm and fully compatible with Bently 3300 and 3500 series proximitors.00 stands for zero exposed unthreaded sensing tip; the probe detection surface is flush with the thread end plane without any protruding bare tip, designed for flush installation on compact bearing housings where protruding probe tip into lubricant chamber is forbidden.08 defines total stainless steel probe housing length of 80 millimeters, customized for ultra-shallow mounting holes on miniature or compact bearing pedestals with limited installation depth.18 specifies factory pre-integrated built-in probe cable length of 1.8 meters; this fixed length is incorporated into full-loop capacitance calculation together with extension cable and proximitor, arbitrary field cutting or mismatched cable replacement will break original impedance matching and lead to measurement zero drift and non-linear output error.02 indicates standard configuration: non-armored fluoropolymer outer cable jacket equipped with gold-plated standard ClickLoc stainless steel threaded connector at cable end, without extra metal armor sheath or custom modified plug structure. All mechanical and electrical parameters are fixed during production and cannot be altered arbitrarily on installation site.
3. Mechanical and Raw Material Specifications
The internal sensing coil core is made of high-stability precision alloy wrapped with high-temperature resistant modified PPS insulating layer, featuring stable dielectric constant, outstanding oil resistance and anti-corrosion performance to retain fixed capacitance under varying ambient temperature and persistent workshop oil mist. Probe outer housing adopts precision CNC-machined solid stainless steel with excellent anti-shock, rust-proof and high-temperature steam resistant performance for long-term installation adjacent to hot-running equipment casings. Internal signal conductors are multi-strand oxygen-free copper to minimize high-frequency signal attenuation and improve anti-RFI interference capacity. Intermediate fluoropolymer insulation maintains steady dielectric property matching eddy-current working principle requirements. Outer cable jacket is wear-resistant thermoplastic elastomer to withstand on-site scratch, dust accumulation and lubricant soaking erosion. The tail stainless steel connector is fitted with built-in elastic rubber sealing ring to prevent moisture, fine metal scraps and hydraulic oil from penetrating into inner wiring after mating with matched extension cable terminal. The integral cable keeps proper flexible property for convenient field wiring within specified minimum bending radius without insulation cracking.
4. Electrical Performance and Environmental Working Parameters
This proximity probe must be paired with designated compatible proximitor powered by negative DC supply ranging from -17.5VDC to -26VDC. The complete measuring loop consisting of probe, certified extension cable and supporting proximitor retains factory-calibrated fixed sensitivity of 3.94V/mm, with effective frequency response ranging 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 installation and high-temperature layout near hot turbine and compressor bearing housings; dry storage temperature spans -55℃ ~ +95℃ under non-condensing storage surroundings. Working relative humidity is limited between 5%RH and 95%RH with no internal condensation allowed to avoid insulation aging and inner core short-circuit failure. When installed above 1000 meters altitude, shorten regular inspection cycle properly due to thinner air and reduced heat dissipation efficiency. The probe can withstand regular industrial ambient vibration of 10Hz~60Hz; long-term continuous service in surroundings with strong corrosive chemical gas and uninterrupted hot steam immersion is strictly prohibited to extend service life of internal components.
5. Application Scope and Routine Maintenance Guidance
3000-00-08-18-02 short-body flush-mounted proximity probes are widely installed on compact bearing pedestals of large rotating equipment as core sensing components of TSI machinery protection systems in power plants, oil refineries and metallurgical workshops for real-time vibration and clearance monitoring.
During regular field maintenance, operators periodically inspect probe housing integrity, outer cable abrasion status and connector fastening tightness to avoid intermittent signal loss caused by loose connection or jacket rupture and subsequent oil infiltration inside wiring. For fault replacement, only spare probe with identical full part number can be adopted; mismatched flush tip design, housing length or built-in cable length will change total loop capacitance and cause measuring data distortion. All aftermarket refurbished probes complete full capacitance recalibration, load aging and alternating high-low temperature shock test complying with original factory standards before delivery to guarantee full interchangeability during equipment overhaul and spare part replacement.
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