The Bently Nevada 330101-00-20-90-02-00, also cataloged as the 3300 XL 8 mm Proximity Probe, operates as a dedicated hardware component for non-contacting displacement measurement within industrial rotating machinery monitoring systems.

Suffix Configuration Matrix

The part number defines specific mechanical and physical interface parameters:

• 330101: 8 mm Proximity Probe, 3/8-24 UNF thread

• 00: Unthreaded length identifier

• 20: Case length (200 mm)

• 90: Total length (9.0 meters)

• 02: Connector type (Miniature coaxial ClickLoc)

• 00: Agency approval (Standard)

Hardware Technical Specifications

TSI Mechanical Monitoring Characteristics

Accurate rotor dynamics analysis depends on precise eddy-current probe scaling. This probe must be calibrated with a compatible 3300 XL Proximitor sensor to achieve a nominal gap voltage of -10 VDC at the linear range center. Technicians must ensure cross-talk suppression by maintaining adequate physical separation between adjacent probes to prevent electromagnetic interference. Validation of the output signal against known vibration signatures is required to confirm that the transducer correctly captures shaft radial displacement without signal distortion.

Ordering Info

• 1 x 330101-00-20-90-02-00 8 mm Proximity Probe

• 2 x Mounting nuts (3/8-24 UNF)

• 1 x Connector protector

• 1 x Technical documentation and installation guide

Field Installation Guidelines

• Mechanical Clearance: Maintain a minimum radial clearance of 40 mm from the probe tip to any stationary metallic objects.

• Mounting Torque: Apply 6.8 N m (60 in-lb) of torque to the mounting nuts to secure the housing without inducing stress on the probe threads.

• Grounding Strategy: Ensure the coaxial cable shield is bonded to a clean earth ground at the monitor rack to mitigate noise and ground loops.

• Cabling Integrity: Utilize rigid or flexible metal conduit to protect the coaxial cable run; observe a minimum bend radius to prevent impedance changes.

Frequently Asked Questions

• Can the probe cable be shortened in the field? No, the system is calibrated for a fixed 9.0-meter cable length; any modification will result in signal measurement errors.

• What signifies a probe "Not OK" condition? A reading at the positive or negative supply rail limit indicates an open or short circuit in the probe/cable assembly.

• Can I replace the probe tip? The probe assembly is a hermetically sealed, non-repairable unit; the entire probe must be replaced if damaged.

• How do I perform a static gap check? Utilize a feeler gauge to set the gap and verify the DC output voltage at the Proximitor monitor terminal.

• Is the probe compatible with high-temperature oil? The Ryton tip material is rated for continuous operation at temperatures up to 177 deg C.

• Can I use this probe with non-XL Proximitor sensors? No, XL series probes require specific Proximitor circuitry to maintain linearity and output sensitivity.

• How do I prevent signal noise? Use shielded coaxial cabling and ensure all connections are tight and protected from environmental moisture.

• What is the role of the connector protector? It provides environmental sealing at the coaxial connection point to prevent oxidation and moisture ingress.