Configured for high-precision displacement and vibration measurement in rotating machinery, the Bently Nevada 330101-00-08-10-11-00 (330101-00-08-10-11-00 8 mm Proximity Probe) provides direct physical execution of eddy-current sensing within turbine monitoring (TSI) networks.

Model Nomenclature Breakdown

The 330101-00-08-10-11-00 is structured according to Bently Nevada's 3300 XL 8 mm transducer system standards:

• 330101: 8 mm probe without armor.

• 00: Unthreaded length (0 mm).

• 08: Overall case length (80 mm).

• 10: Total length (1.0 meter).

• 11: Connector type (Miniature coaxial connector with housing).

• 00: Agency approval (Not required).

Hardware Specifications

Eddy-Current Sensing and Rotor Dynamics

This transducer system operates by inducing eddy currents in the target surface, requiring meticulous probe scaling to maintain linear output over the intended range. During installation, gap voltage validation is mandatory; the target setpoint of -10 VDC centers the probe within its linear region to ensure accurate vibration data. The 3300 XL system incorporates robust cross-talk suppression, preventing interference between adjacent probes in multi-channel TSI architectures. These characteristics allow the probe to precisely monitor rotor dynamics, detect shaft centerline position, and identify radial vibration signatures in high-velocity turbomachinery.

Ordering info

• One (1) 330101-00-08-10-11-00 Proximity Probe.

• Protective tip cover.

• Technical compliance and installation documentation.

• Note: Extension cables and Proximitor sensors are sold separately and must be impedance-matched to the 3300 XL system.

Field Installation Guidelines

• Mechanical Interface: Secure the probe in a rigid housing to minimize measurement bias; ensure the probe tip is perpendicular to the shaft target.

• Gap Setting: Utilize a feeler gauge to establish the initial mechanical gap; verify the output voltage at the Proximitor terminal block.

• Cabling: Use appropriate cable ties to secure the coaxial lead, ensuring it does not touch rotating components or vibrate against sharp edges.

• Connector Handling: Mating connectors must be clean; avoid excessive axial force when connecting to extension cables to prevent center-pin damage.

• Environmental Protection: Apply dielectric grease to connector threads if the installation environment is prone to humidity or liquid exposure.

Frequently Asked Questions

• What is the target gap voltage for this model?

  The nominal gap voltage is -10 VDC, which ensures the probe is operating within its linear sensing range for accurate vibration measurement.

• Is this probe compatible with older 3300 series Proximitors?

  The 3300 XL probes are designed for the 3300 XL system; using them with legacy 3300 Proximitors may result in signal inaccuracy and require recalibration.

• Can I shorten the 1.0 meter lead length?

  No. The system is calibrated for a specific total length (Probe + Extension Cable); altering the lead length will invalidate the calibration.

• How does the 08 case length influence placement?

  The 80 mm case length defines the physical insertion capacity; ensure the mounting bracket allows for this length to achieve the desired gap.

• Is the 330101 probe suitable for high-pressure environments?

  The probe tip and body are pressure-rated, but verify the mounting seal (e.g., O-ring or NPT fitting) is adequate for your specific pressure vessel requirements.

• How is a failure indicated by the monitoring system?

  Probe failure is typically indicated by a "Gap Error" on the monitor display, often signaling a short circuit, open circuit, or voltage drift to the supply rail.

• Why is the thread specification 3/8-24 UNF?

  This thread pitch is standard for 8 mm probes to allow for fine adjustments during the gap setting process.

• Does this probe require grounding?

  The probe body is grounded through the housing mount; ensure the mounting bracket has a low-impedance connection to the machine ground.