Product Core Brief

• Model: 330180-51-CN
• Brand: Bently Nevada (Baker Hughes)
• Series: 3300 XL 8mm Eddy-Current Proximity Transducer System Proximitor
• Suffix Decode:
  1. 330180: Base model, standard 8mm XL 前置器
  2. -51: Max total transducer system length 5.0m, 35mm DIN rail mounting form factor
  3. CN: China special certification version, carries NEPSI Chinese hazardous area certification + ATEX/IECEx global zone approvals, equivalent to standard -05 multi-cert model for domestic petrochemical, power plant classified zones
• Core Function: Dedicated signal conditioner matched for all 3300 XL 8mm proximity probes; converts probe high-frequency RF eddy-current signal into DC static gap voltage + AC dynamic vibration voltage, used for radial shaft vibration, axial thrust displacement, Keyphasor rotational speed measurement on gas/steam turbines, centrifugal compressors and fluid-film bearing rotating machinery.
• Product Type: Compact DIN rail mount Proximitor sensor (front end), fully compatible with all 3500 series TSI rack monitor modules
• Key Specs: 5m full system length support | DIN35 rail installation | 7.87 V/mm (200 mV/mil) linear sensitivity | SpringLock quick-release wiring terminals | Global + Chinese NEPSI hazardous safety certifications
• Condition: New Original (New Surplus), active OEM machinery protection spare, no formal obsolescence schedule

Key Technical Specifications

Product Introduction

This 5-meter DIN rail Proximitor is the core signal conversion component of the 3300 XL 8mm eddy-current monitoring system, designed for dense industrial control cabinet layouts. It receives weak high-frequency RF signals from proximity probes and separates two independent analog outputs:

1. DC gap voltage: Represents static shaft-to-probe clearance (thrust bearing axial position monitoring)
2. AC vibration voltage: Represents dynamic radial shaft vibration amplitude for machinery fault protection

The -CN variant adds China domestic NEPSI explosion-proof certification on top of standard international ATEX/IECEx approvals, fully meeting the safety compliance requirements of Chinese refinery, LNG, chemical plant and thermal power hazardous classified areas, replacing the standard 330180-51-05 multi-cert model for domestic project bidding.

Complete measurement system composition: 8mm 3300 XL probe + optional matching extension cable + this 330180-51-CN Proximitor + 3500 series TSI rack monitor.Critical compatibility note: Only works with 50Ω triaxial 8mm XL probe systems; cannot pair with 75Ω NSv miniature probes or 11mm large-range probe hardware.

Firmware & Software Compatibility Notes

This Proximitor is pure analog signal conditioning hardware with no built-in firmware. System matching rules for paired 3500 TSI rack monitors:

• Minimum compatible 3500 monitor firmware: Revision G
• Minimum rack configuration software: 3500 Rack Configuration Software v2.00
• All M-series monitor modules in the 3500/05 chassis must run unified matching firmware revisions to correctly parse the 200 mV/mil linear gap voltage curve of the 8mm XL system.
• Commissioning mandatory step: Input total 5m transducer combined length into rack software to activate built-in cable capacitance linearity compensation; incorrect length input will generate permanent measurement offset errors.

Frequently Asked Questions

1. Can I disconnect the probe ClickLoc cable while 24VDC power remains live?Yes, power shutdown is not required for connector disconnection. Unplugging the RF input will trigger persistent channel fault alarms on the 3500 rack and cut all vibration/displacement data, but no permanent damage occurs to the Proximitor internal circuit or rack monitor analog input. Fully re-seat the ClickLoc connector until the locking tab clicks to clear fault status.
2. Is this part obsolete? Are there direct plug-and-play alternative variants?This DIN rail 5m Proximitor remains active OEM stock with no end-of-life date.

• Standard global non-China-cert version: 330180-51-00 (no explosion-proof agency approvals, only for non-classified general industrial cabinets)
• Global multi-cert export version: 330180-51-05 (ATEX/IECEx/CSA only, without Chinese NEPSI, cannot be used for domestic hazardous zone projects)The -CN version is uniquely qualified for Chinese explosion classified areas and is not zero-modification interchangeable with -00/-05 for domestic safety instrumented loops.

1. Will transducer length calibration or linearity data be lost after full rack power loss?All 5m system length and sensitivity calibration parameters are stored in non-volatile flash memory on the paired 3500 monitor module, not inside this Proximitor. Complete rack power failure will not erase transducer configuration; swapping this unit only requires physical reconnection with zero software rework if total transducer length stays unchanged.
2. What warranty and reliability differences exist between New Surplus original and refurbished units?New Surplus original factory units carry a 12-month full functional warranty covering RF input linearity, DIN housing structural integrity, SpringLock terminal conductivity, and full NEPSI/ATEX certification validity. Refurbished units only provide 3–6 month limited coverage, with hidden failure risks including aged RF filter capacitors, loose internal solder joints, degraded ClickLoc connector contacts that cause unstable vibration readings during turbine thermal load cycles.
3. Why is New Surplus original pricing higher than generic second-hand/refurbished alternatives?All brand-new original Proximitors pass complete standardized factory QC validation: serial number traceability against OEM production logs, full 0–2.3mm linearity sweep bench testing, 24-hour thermal soak aging test, RF input impedance matching verification, repeated connector plug/unlock durability cycling, and sealed anti-static factory packaging with full certification documentation. Refurbished units skip this multi-step electrical and mechanical testing workflow, introducing unplanned downtime risk for safety-critical turbine and compressor vibration protection loops.
4. Can this 5m Proximitor match 11mm 330700 series large-range proximity probes?No, this hardware is exclusively circuit-tuned for 50Ω triaxial 8mm XL transducer systems. 11mm probe systems adopt different cable capacitance matching parameters; cross-mixing hardware completely breaks measurement linearity and creates severe permanent offset errors. Verify 8mm vs 11mm probe model before wiring to avoid irreparable RF input circuit damage.
5. Does this Proximitor locally store vibration waveforms or long-term shaft position trending data?No, this is purely analog signal conversion hardware with zero data storage memory. All vibration amplitude, thrust displacement, Keyphasor rotational speed historical trending records and fault event logs are captured and stored exclusively on the Slot1 3500/20 TDI master communication gateway module. This unit only converts probe RF signals to analog DC/AC outputs with no waveform capture or data retention capability.