Built for continuous rotor vibration analysis and shaft position telemetry, the Bently Nevada 330101-00-20-20-02-CN (330101) transducer system provides high-precision gap measurement on critical turbomachinery.

Part Nomenclature & Ordering Structure

• 330101: 3300 XL 8 mm Proximity Probe featuring an externally threaded case design
• 00: Unthreaded case length option indicator (0.0 in baseline configuration)
• 20: Total electrical length variant code matching specific system capacitance
• 20: Miniature coaxial ClickLock connector layout paired with specialized molding
• 02: Multi-agency hazardous area certification and compliance approval
• CN: Regional factory labeling and country-specific conformance code

Core Electrical & Mechanical Parameters

Transducer Operation & Centerline Verification

The eddy-current sensing architecture utilizes high-frequency radio frequency signals to measure the physical distance separating the probe tip from the conductive shaft surface. Accurate telemetry requires establishing a static gap voltage target of approximately -10 VDC during normal machinery operation at centerline. Mutual cross-talk prevention is maintained by enforcing strict spatial separation rules between neighboring probe tips when dual-plane monitoring brackets are installed.

Standard Box Contents

• 1 x Bently Nevada 330101-00-20-20-02-CN 3300 XL Proximity Probe
• 1 x Coaxial ClickLock Connector Protective Dust Cover
• 1 x Brass Mounting Nut equipped with integrated locking threads
• 1 x Environmental Insulation Sleeve for high-temperature protection

Mechanical Installation Procedures

• Probe Insertion and Fastening
  • Inspect machine mounting threads to ensure they are free of debris, burrs, or lubricants prior to probe installation.
  • Apply controlled torque levels using calibrated instruments to secure the probe body without causing mechanical case distortion.
• Cable Management and Grounding
  • Route the integral coaxial cable safely away from high-voltage power conduits, motor starters, and frequency drives.
  • Terminate the signal shield exclusively at the instrument rack ground terminal to prevent undesirable ground loops.

Technical FAQs

• Q: What electrical output scale factor does this model provide?
• A: The nominal incremental scale factor is 7.87 V/mm (200 mV/mil) when integrated with its matched Proximitor sensor.
• Q: What is the maximum continuous temperature endurance for the probe tip?
• A: Both 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 startup alignment?
• A: Initial mechanical gap voltage must be adjusted to roughly -10 VDC to position the probe squarely within its linear range.
• Q: Are specialized tools necessary to couple the ClickLock connectors?
• A: No, these connectors are designed for secure hand tightening while providing tactile feedback against heavy vibration.
• Q: What standard thread size is machined onto the probe housing?
• A: The unit utilizes standard 3/8-24 UNF threading built for insertion into industrial bearing housing ports.
• Q: How does total cable length affect overall signal performance?
• A: Total electrical length determines specific Proximitor matching requirements to preserve calibration accuracy and linearity.
• Q: What power supply drives the internal transducer 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 required?
• A: Single-point grounding suppresses high-frequency electromagnetic noise and prevents loop-induced signal distortion.