Configured for non-contacting vibration and position measurement in rotating machinery, the Bently Nevada 330171-00-12-50-01-05 (330171 Proximity Transducer) provides direct physical signal execution via eddy-current sensing. This hardware component converts target displacement into a proportional voltage signal for localized monitoring instrumentation.

Suffix Breakdown & Model Matrix

• 330171: 3300 5 mm Proximity Probe

• 00: Unthreaded Length (0 mm)

• 12: Overall Case Length (120 mm)

• 50: Total Length (5.0 meters)

• 01: Connector Type (Miniature coaxial ClickLoc connector, no connector protector)

• 05: Agency Approval (CSA, ATEX, IECEx)

Hardware Specifications

Mechanical Monitoring & Eddy-Current Performance

The 3300 5 mm transducer system utilizes precise eddy-current probe scaling to convert target gap into a linear voltage output. To ensure measurement accuracy, the gap voltage must be validated at -10 VDC during cold startup, positioning the sensor in the center of its linear range. Rotor dynamics monitoring relies on maintaining signal integrity throughout the signal chain. Effective cross-talk suppression is implemented via the Proximitor sensor electronics, preventing signal interference when multiple probes are installed in high-density sensor arrangements near the machine rotor.

Ordering Information

• 1 Bently Nevada 330171 5 mm Proximity Probe

• 1 Threaded jam nut

• 1 Technical manual

Field Installation Guidelines

• Gap Positioning: Maintain a nominal gap of 0.75 mm from the target surface during installation.

• Torque Specifications: Secure the probe locknut to 5.6 N-m; avoid excessive force to prevent housing thread damage.

• Cable Routing: Keep coaxial cables separate from high-voltage AC lines; maintain a 25 mm minimum bend radius.

• Grounding: Ensure the cable shield is grounded at the monitor terminal block to prevent ground-loop noise.

Frequently Asked Questions

• What is the linear range of this 5 mm probe?

  The linear range is 1.0 mm, typically defined from 0.25 mm to 1.25 mm from the target.

• Can I shorten the 5.0 m cable in the field?

  No. The system is calibrated for the specific cable length; cutting the cable will alter the impedance and output scaling.

• Is the connector interchangeable with 3300 XL series?

  The 3300 5 mm probes are designed for specific 3300 series monitor configurations and should be matched with the correct Proximitor sensor.

• Why is the 5 mm size used instead of 8 mm?

  The 5 mm probe is utilized in applications where mounting space is restricted and the larger 8 mm probe cannot be accommodated.

• How does target material affect performance?

  The transducer is calibrated for AISI 4140 steel; other target metals require specific scaling factors for accurate measurement.

• What indicates a cable break?

  A sudden shift in output voltage to -24 VDC typically indicates a severed cable or loss of connection to the Proximitor sensor.

• Does this probe require calibration?

  The system is factory-calibrated. No field calibration is required beyond initial gap voltage verification during installation.

• Is the probe tip replaceable?

  No, the probe tip is an integral part of the probe assembly to ensure internal hermetic sealing and structural reliability.