Bently Nevada 330850-50-CN

Bently Nevada 330850-50-CN

Product Introduction: The 330850-50-CN is a proximity probe in the Bently Nevada 3300 XL 5mm eddy current sensor system. It is a compact non-contact sensor designed for measuring shaft radial vibration, axial displacement, keyphasor signals, and rotational speed on rotating machinery where space constraints prevent the use of larger diameter probes. The -50 code indicates a specific probe body length configuration, and the -CN suffix indicates compliance with Chinese regional standards.

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Description

Bently Nevada 330850-50-CN

Technical Specifications:
  • Probe Diameter: 5 mm
  • Mounting Thread: M8×1 metric thread
  • Sensitivity: 7.87 V/mm (200 mV/mil)
  • Linear Range: 1.25 mm (0.25 mm to 1.5 mm gap)
  • Frequency Response: 0 to 10 kHz
  • Recommended Gap Setting: 0.76 mm (30 mils), approximately -10 Vdc
  • Operating Temperature (Probe Tip): -40°C to +177°C
  • Connector Type: ClickLoc miniature coaxial connector
  • Certification: CN suffix indicates compliance with Chinese regional standards
  • Protection Rating: IP67 (probe body)
  • Compliance: API 670 standard
Functional Features:
  • Compact 5mm diameter for installation in tight spaces
  • Non-contact eddy current measurement with sub-micron resolution
  • Multi-parameter monitoring: radial vibration, axial displacement, keyphasor, speed
  • Compatible with Bently Nevada 3500, 2300/20, and 1900/65A monitoring systems
  • Interchangeable within the 3300 XL 5mm system
  • ClickLoc connector provides secure, IP67-rated connection
Application Scenarios:
  • Small turbines and compressors where space is limited
  • Auxiliary pumps and fans
  • Gearboxes with limited bearing housing access
  • Electric motors with constrained mounting areas
  • General industrial machinery in non-hazardous environments
  • TSI systems where compact probe size is required
Performance Parameters:
  • Sensitivity: 7.87 V/mm ±5% (5m system) or ±6.5% (9m system)
  • Linearity: ±1% full scale
  • Resolution: 0.1 μm
  • Frequency Response: DC to 10 kHz
Material Composition:
  • Probe Housing: AISI 303/304 stainless steel
  • Probe Tip: PPS engineering plastic with ferrite core
  • Cable: FEP-insulated coaxial cable
  • Connectors: ClickLoc gold-plated copper
Structural Features: Cylindrical 5mm diameter probe body with M8×1 threaded mounting section. The compact size allows installation in confined spaces where 8mm or 11mm probes cannot fit. The probe features an integrated cable with a ClickLoc connector.
Working Principle: The probe operates on the eddy current principle. A high-frequency oscillating coil in the probe tip generates an alternating magnetic field. When positioned near a conductive target, eddy currents are induced on the target surface, creating a counter magnetic field. The interaction changes the probe coil impedance proportionally to the gap distance. The Proximitor electronics convert this impedance change into a linear voltage output.
Installation Requirements:
  • Mount in M8×1 threaded bracket with 1.0 to 1.5 N·m torque
  • Ensure perpendicular alignment to the shaft surface (within 3°)
  • Total system cable length must be 5.0 m or 9.0 m
  • Connect to 3300 XL Proximitor via extension cable
  • Adjust gap to -10.0 Vdc ± 0.2 Vdc
  • Single-point shield grounding at Proximitor or monitor end
  • Route signal cables away from EMI sources (minimum 30 cm separation)
Usage Notes:
  • The -CN suffix confirms Chinese market compliance; verify local certification requirements
  • Target material must match Proximitor calibration (default AISI 4140 steel)
  • Target surface must be clean, smooth, and free of coatings
  • Perform gap adjustment with the machine at rest
  • The 5mm probe has a smaller linear range than 8mm probes; ensure adequate clearance
  • Observe ESD precautions when handling connectors

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