Designed to capture high-resolution radial vibration and axial thrust position telemetry on heavy industrial turbomachinery, the Bently Nevada 330101-00-77-20-02-CN (330101) proximity transducer delivers robust physical displacement measurement.

Part Identification & Suffix Configuration

• 330101: 3300 XL 8 mm Proximity Probe featuring an externally threaded housing design
• 00: Unthreaded case length designation (0.0 in baseline specification)
• 77: Total electrical cable length option tailored for custom routing layouts
• 20: Miniature coaxial ClickLock connector style paired with robust molded boots
• 02: Multi-agency hazardous area safety certification and approval rating
• CN: Regional factory labeling and country-specific conformance identifier

Physical & Electrical Performance Matrix

Transducer Operating Physics & Centerline Tuning

The eddy-current sensing architecture utilizes high-frequency radio frequency modulation to determine the physical gap distance between the probe tip and the moving metallic shaft. Accurate machine protection depends on verifying the static gap voltage, targeting an operational baseline of -10 VDC during normal centerline rotation. Mutual cross-talk interference is prevented by maintaining strict physical clearance buffers between adjacent probe tips in multi-axis mounting arrangements.

Package Delivery Contents

• 1 x Bently Nevada 330101-00-77-20-02-CN 3300 XL Proximity Probe
• 1 x Coaxial ClickLock Connector Protective Dust Cover
• 1 x Standard Brass Mounting Nut fitted with locking threads
• 1 x High-Temperature Environmental Insulation Sleeve

Mechanical Installation Protocol

• Threaded Housing Insertion
  • Ensure machine mounting ports and internal threads are clean, dry, and free of foreign debris prior to probe placement.
  • Apply controlled torque levels using calibrated wrenches to secure the probe body without causing mechanical case deformation.
• Cabling and Shield Earthing
  • Route the integral coaxial lead safely away from high-voltage AC power pathways, motor lines, and variable frequency drive outputs.
  • Anchor the signal shield exclusively to the dedicated earth ground terminal at the monitor rack to eliminate loop interference.

Technical FAQs

• Q: What incremental scale factor does this specific configuration produce?
• A: The nominal scale factor is 7.87 V/mm (200 mV/mil) when paired with a compatible Proximitor sensor.
• Q: What is the maximum continuous temperature endurance for the probe tip?
• A: The probe tip and integral coaxial cable tolerate continuous operating environments up to +177 deg C.
• Q: What gap voltage level should technicians target during initial setup?
• A: Initial mechanical gap voltage must be tuned to approximately -10 VDC to center the operating range.
• Q: Are specialized tightening tools required for the ClickLock connectors?
• A: No, these connectors are designed for secure hand tightening while providing positive feedback against heavy vibration.
• Q: What thread standard is machined onto the exterior of the probe body?
• A: The unit utilizes standard 3/8-24 UNF threading built for insertion into industrial bearing housing ports.
• Q: How does total cable length impact system signal behavior?
• A: Total electrical length dictates specific Proximitor calibration parameters to preserve signal capacitance and linearity.
• Q: What power supply energizes the internal transducer measurement loop?
• A: A regulated -24 VDC power source integrated within the monitor rack chassis powers the measurement circuit.
• Q: Why is single-point shielding termination strictly enforced?
• A: Single-point grounding suppresses high-frequency electromagnetic noise and prevents ground loop signal distortion.