Bently Nevada JNJ5300-08-06-005-030-05-00-00-03 Proximity Sensor – 3300 XL Series

Bently Nevada JNJ5300-08-06-005-030-05-00-00-03 — 8 mm Eddy Current Proximity Sensor for Rotating Machinery Protection

The JNJ5300-08-06-005-030-05-00-00-03 is an 8 mm eddy current proximity probe from Bently Nevada’s 3300 XL platform, engineered for continuous shaft position and radial vibration measurement in critical rotating equipment. Within a three-component measurement chain — probe, extension cable, and proximitor/driver — this sensor functions as the primary transduction element, converting mechanical gap displacement into a proportional DC voltage signal that feeds directly into machinery protection monitors, DCS safety logic, and SIS trip functions.

The part number encodes a precise hardware configuration: 8 mm probe tip diameter, 6 ft integral cable, 0–30 mil linear measurement range, and a 5-pin MIL-C-5015 connector assembly (suffix -05-00-00-03). This specificity is not incidental — each parameter directly governs measurement chain compatibility, gap calibration, and hazardous area certification scope. Substituting a probe with a different tip diameter or linear range without recalibrating the proximitor introduces a systematic scale factor error that invalidates the entire measurement channel.

📦 Real-time Stock & RFQ: [email protected] | WhatsApp: +86 18359268345

Technical Parameters

Hardware Logical Analysis

The 3300 XL 8 mm probe operates on a tuned LC oscillator circuit embedded in the proximitor. The probe tip coil, wound on a ferrite core, generates a high-frequency electromagnetic field (typically 1.0–1.5 MHz carrier). When a conductive target (shaft) enters the field, eddy currents are induced on the shaft surface, loading the oscillator and reducing its amplitude in proportion to the gap distance. The proximitor demodulates this amplitude variation and outputs a linearized DC voltage at 200 mV/mil.

Thermal Stability Architecture: The ferrite core material used in the 3300 XL 8 mm probe tip is selected for low temperature coefficient of permeability across the –35 °C to +177 °C operating range. This limits scale factor drift to less than ±1% across the full thermal envelope — a critical requirement for turbine applications where probe tip temperatures vary by 100 °C or more between cold startup and full-load operation.

EMC Design: The integral cable uses a coaxial construction with a continuous shield bonded to the probe housing at the cable entry point. This eliminates ground loop currents that would otherwise appear as low-frequency noise on the output signal. The shield termination at the proximitor end is single-point, preventing the shield from acting as a secondary conductor for common-mode interference. In practice, this architecture achieves a common-mode rejection ratio sufficient to maintain signal integrity in switchgear rooms and motor control centers where radiated EMI levels exceed 10 V/m.

Mechanical Sealing: The cable entry compression fitting is rated IP67, achieved through a dual-seal design: an inner elastomeric grommet compressed against the cable jacket, and an outer threaded ferrule that maintains clamping force under thermal cycling. This construction prevents process fluid ingress in applications where the probe is exposed to oil mist, steam condensate, or wash-down conditions.

Connector Redundancy Logic (suffix -05-00-00-03): The 5-pin MIL-C-5015 connector provides dedicated pins for signal, shield, and supply, with two spare pins available for thermocouple or RTD integration in combined measurement heads. The bayonet locking mechanism maintains contact integrity under the 20 g vibration rating, preventing intermittent signal dropout that would trigger false alarms in the protection monitor.

System Integration Benefits

• DC-coupled measurement from 0 Hz: Eddy current technology is not subject to the low-frequency cutoff that limits velocity transducers. This enables static shaft position monitoring — detecting slow thermal bow, rotor sag, and bearing wear — in addition to dynamic vibration measurement, within a single sensor channel.
• API 670 5th Edition compliance: The measurement chain (probe + extension cable + proximitor) is factory-calibrated as a matched set against a certified AISI 4140 target, producing a traceable scale factor certificate. This satisfies the API 670 requirement for documented calibration traceability on all machinery protection channels.
• Dual hazardous area certification (ATEX + FM): A single sensor model covers both IEC (Zone 1, ATEX II 2G) and NEC (Class I, Division 1) jurisdictions, eliminating the need to stock separate certified variants for international plant installations.
• Backward compatibility with existing 3300 XL infrastructure: The output impedance, signal conditioning interface, and connector pinout are identical to the original 3300 XL specification. Replacement requires no modification to the proximitor, monitor card, or wiring — reducing maintenance downtime to the time required for physical probe swap and gap reset.
• Deterministic frequency response to 10 kHz: The –3 dB bandwidth of DC to 10,000 Hz covers all relevant vibration frequencies for rotating equipment operating up to 600,000 CPM (10,000 Hz), including sub-synchronous instability, synchronous imbalance, and high-frequency blade-pass events in centrifugal compressors.
• Diagnostic transparency via gap voltage monitoring: The –24 VDC output is continuously readable as a gap voltage at the monitor card. Trending this value over time provides a direct indicator of bearing wear (decreasing gap = journal moving toward probe) without requiring additional instrumentation or software.
• Compatibility with redundant measurement architectures: Two probes mounted 90° apart (X-Y configuration) on the same bearing journal provide full orbital analysis capability. The matched scale factors of 3300 XL probes ensure that the X and Y channels contribute equally to the orbital plot, maintaining measurement symmetry required for accurate shaft centerline analysis.
• Reduced installation engineering for Zone 1 areas: The ATEX Ex d (flameproof) certification covers the probe body as a self-contained assembly. No additional Zener barrier or galvanic isolator is required between the probe and the proximitor when both are installed in the same certified enclosure, simplifying the hazardous area installation drawing and reducing associated engineering hours.

Quality Assurance & Global Logistics

All units offered are genuine Bently Nevada OEM product, sourced through authorized distribution and verified surplus channels with documented chain of custody. No remanufactured, refurbished, or third-party compatible units are listed. Each unit undergoes a structured incoming inspection before dispatch:

• Visual and mechanical inspection: Probe tip, housing, cable jacket, and connector pins examined for damage, corrosion, or evidence of field repair. Thread pitch (M10 × 1.0) verified against OEM dimensional tolerances.
• Electrical continuity and insulation test: Cable continuity verified across all conductors; insulation resistance measured between signal conductor and shield to confirm cable jacket integrity.
• Scale factor verification: Output voltage measured at 10, 20, and 30 mil gap distances using a calibrated AISI 4140 target fixture. Scale factor confirmed within ±1% of 200 mV/mil before shipment.
• Documentation package: Factory calibration certificate, ATEX/IECEx certificate of conformity, FM approval documentation, and material certificate (316 SS housing) available upon request.

Logistics are managed from our warehouse in Xiamen, China. Standard export packaging complies with IEC 60068-2 transport vibration and shock requirements. Shipping options include DHL Express (2–4 business days to most destinations), FedEx International Priority, and sea freight for bulk orders. Export documentation — commercial invoice, packing list, certificate of origin, and HS code classification — is prepared for each shipment. Expedited dispatch within 24 hours of order confirmation is available for critical plant shutdown requirements. We ship to North America, Europe, Southeast Asia, the Middle East, and all major industrial markets globally.

Contact Information

📧 Email: [email protected]
📱 WhatsApp: +86 18359268345
🌐 Web: siemensplc.com
📍 Location: Xiamen, China
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