Configured for radial vibration and axial position measurement in rotating machinery, the Bently Nevada 330172-16-42-10-01-00 (330172 Proximity Transducer) provides direct physical execution of displacement sensing via eddy-current induction within 3300 XL monitoring platforms.

Model Suffix Decomposition

The 330172-16-42-10-01-00 part number indicates the following hardware configuration:

• 16: 8 mm probe tip diameter.

• 42: 42 mm case length (threaded).

• 10: 10 mm unthreaded case length.

• 01: Connector option with protective housing.

• 00: No agency approval options.

Hardware Specifications

Mechanical Monitoring and Eddy-Current Scaling

The 3300 XL transducer system utilizes eddy-current probe scaling to convert target surface displacement into a proportional voltage signal. Calibration is typically performed against an AISI 4140 steel target. System accuracy is contingent on maintaining a target gap voltage of -10 VDC during installation. Proper rotor dynamics analysis requires that the probe assembly is mounted with sufficient mechanical rigidity to prevent probe resonance. Additionally, proper cross-talk suppression must be observed in multi-channel installations by ensuring the minimum physical separation between adjacent probe tips is maintained to prevent interference between carrier signals.

Ordering info

• 1 x 330172-16-42-10-01-00 8 mm Proximity Transducer

• 1 x Lock nut assembly

• 1 x Connector protective cap

• 1 x Calibration data sheet

Field Installation Guidelines

• Mounting: Ensure the transducer is mounted in a bracket with sufficient stiffness to prevent natural frequency interference.

• Gap Setting: Use a feeler gauge to achieve the target gap. Final verification must be performed by measuring the output voltage at the Proximitor sensor.

• Grounding: Ensure the transducer housing is electrically bonded to the machine case unless isolation is required to prevent ground loops.

• Cable Routing: Route the coaxial cable through shielded metallic conduit to mitigate electromagnetic interference from high-voltage cabling.

Frequently Asked Questions

• Q: Can this transducer be field-repaired?

  A: No. Any attempt to modify the transducer or its cable assembly will result in impedance mismatching, rendering the system calibration invalid.

• Q: What is the maximum linear range?

  A: The linear range is 2 mm, which is standard for the 3300 XL 8 mm probe design.

• Q: Does the transducer require external power?

  A: The transducer is passive; it receives power and a high-frequency carrier signal from the associated 3300 XL Proximitor sensor.

• Q: How is the gap voltage validated?

  A: Connect a high-impedance digital multimeter to the output terminals of the Proximitor sensor and adjust the probe position until the DC voltage reads -10 VDC.

• Q: Is the tip material resistant to chemicals?

  A: The Polyphenylene Sulfide (PPS) tip is chemically inert and suitable for most industrial oil and lubricant environments.

• Q: What is the benefit of the protective housing option?

  A: It provides an additional layer of mechanical protection for the connection interface, preventing accidental damage and ingress of foreign particles.

• Q: How does cable length affect performance?

  A: The system is impedance-matched for a specific total length. Changing the length without recalibration will introduce gain and phase errors.

• Q: Can I use this with non-Bently Nevada monitoring systems?

  A: No. The transducer is calibrated to operate specifically with Bently Nevada 3300 XL Proximitor sensors.