Configured for non-contact vibration measurement in rotating machinery, the Bently Nevada 330104-00-05-50-02-00 (330104-00-05-50-02-00 Proximity Probe) provides direct physical electrical execution for radial vibration and axial position sensing across TSI monitoring platforms.

Model Matrix Breakdown

• 330104: 3300 XL 8 mm Proximity Probe

• 00: Unthreaded Length (0 mm)

• 05: Total Case Length (50 mm)

• 50: Agency Approval (Multiple Approvals)

• 02: Connector Option (Miniature Coaxial ClickLoc)

• 00: No Standard Option

Hardware Specifications

Rotor Dynamics and Signal Integrity

The 330104 probe facilitates precise monitoring of rotor dynamics by outputting an eddy-current signal proportional to the gap between the probe tip and the target. To maintain system accuracy, the probe is factory-calibrated to a sensitivity of 7.87 V per mm (200 mV/mil). Installation requires rigorous gap voltage validation to ensure the steady-state gap voltage is -10 VDC at the linear range midpoint. To prevent erroneous readings in dense sensor arrays, the probe includes internal shielding for cross-talk suppression, ensuring that high-frequency signals are not corrupted by adjacent inductive field interference.

Ordering Info

• 1 x 330104-00-05-50-02-00 Proximity Probe

• 2 x Brass Mounting Nuts

• 1 x Installation/Calibration Manual

Field Installation Guidelines

• Mounting Stability: Ensure the probe bracket is rigid. Any resonant vibration in the bracket will be superimposed on the vibration measurement data.

• Conductor Routing: Maintain the coaxial cable in conduit to shield against electromagnetic interference. Use a minimum bend radius of 25 mm.

• Grounding: The probe casing provides a chassis ground through the mounting bracket. Verify that the machine case and instrument signal ground share a common reference point.

• Connector Engagement: Tactilely confirm that the ClickLoc connector is fully seated to ensure a sealed, low-impedance connection.

Frequently Asked Questions

• Can this probe be installed in a standard threaded mounting hole?

  No. The 00 unthreaded option requires a smooth-bore clamp or specifically designed mounting adapter to secure the probe body.

• How is the probe tip protected from chemical damage?

  The PPS tip is chemically inert and designed for immersion in standard turbine lubricating oils and synthetic fluids.

• Does the probe support hot-swapping?

  The probe itself is a passive component. Hot-swapping the probe requires disconnecting the extension cable, which will cause a momentary signal loss in the monitoring system.

• What occurs if the coaxial cable is damaged?

  Damage to the shield or core will alter the system impedance, leading to incorrect voltage outputs and potential system-wide vibration measurement errors.

• Is the -10 VDC gap voltage target universal?

  It is the standard for 3300 XL systems. Deviations from this voltage during setup indicate incorrect gap settings or impedance mismatch in the transducer loop.

• Can I use this with a 3300 (non-XL) monitor?

  No. The 3300 XL probe is calibrated for use with XL Proximitors. Using it with non-XL hardware will result in non-linear output and incorrect scale factors.

• What is the effect of high-temperature operation?

  The probe is rated up to 177 deg C. Exceeding this thermal limit can lead to internal epoxy degradation and permanent sensor failure.

• Does the probe require a specific cable length?

  The probe is part of a calibrated system (Probe + Extension Cable + Proximitor). The total system length must be 5 or 9 meters for proper operation.