Configured for specialized rotor position and vibration measurement in rotating machinery, the Bently Nevada 330106-05-30-10-12-00 (330106-05-30-10-12-00 Reverse Mount Proximity Probes) provides direct physical execution of eddy-current distance sensing within turbine monitoring (TSI) systems where standard through-hole mounting is restricted.

Suffix Breakdown & Model Matrix

The 330106-05-30-10-12-00 series adheres to the Bently Nevada 3300 XL reverse mount configuration standards:

• 330106: 8 mm reverse mount probe.

• 05: Total probe length (50 mm).

• 30: Thread specification (3/8-24).

• 10: Total length (1.0 meter).

• 12: Connector type (Connector with housing).

• 00: Agency approval (none required).

Hardware Specifications

Eddy-Current Probe and TSI Characteristics

This reverse-mount probe utilizes the eddy-current principle to maintain linear output over the measurement range. Accurate gap voltage validation is a mandatory commissioning step; the target operational setpoint remains -10 VDC to ensure the probe functions within the linear transducer curve. The 3300 XL reverse-mount architecture incorporates integrated cross-talk suppression, ensuring that adjacent probes in high-density installations do not interfere with vibration data. These probes are used to monitor rotor dynamics, detect shaft centerline position, and identify radial vibration signatures in turbomachinery where the probe must be mounted from the interior of the machine case.

Ordering info

• One (1) 330106-05-30-10-12-00 Reverse Mount Proximity Probe.

• Mounting nut and washer assembly.

• Technical compliance and installation instruction sheet.

• Note: Extension cables and Proximitor sensors are sold separately and must be compatible with the 3300 XL 8 mm system impedance.

Field Installation Guidelines

• Reverse Mounting: Install the probe through the mounting hole from the inside of the machine case; ensure the mounting surface is clean and flat to prevent probe misalignment.

• Gap Setting: Use a depth micrometer to verify the mechanical gap between the probe tip and the target surface; confirm the output voltage at the Proximitor terminal (target: -10 VDC).

• Torque Specs: Tighten the mounting nut securely to prevent probe vibration; do not exceed torque limits to avoid distorting the probe housing.

• Cable Routing: Protect the coaxial lead during internal machine routing to prevent contact with rotating components or sharp interior edges.

• Connector Integrity: Ensure the internal housing connector is clean; use silicone grease if the installation environment is subjected to oil mist or humidity.

Frequently Asked Questions

• Why is the reverse mount configuration used?

  The reverse mount design is used in machine cases where the probe cannot be inserted from the outside, allowing for mounting from the internal side of the housing.

• Is the 330106 probe electrically identical to the 330101?

  Yes. The transducer electronics are identical; the primary difference is the mechanical housing design required for reverse-mounting applications.

• What is the target gap voltage for this model?

  The standard operating gap voltage is -10 VDC, corresponding to the center of the linear sensing range of the transducer system.

• How does the reverse mount nut affect installation?

  The nut secures the probe against the internal face of the casing; ensure proper gasket or sealant usage if the hole is a potential leak path for machine fluids.

• Can I use a standard extension cable with this probe?

  Yes, provided the connector type matches and the total system length is calibrated to the specific 3300 XL Proximitor being used.

• How do I confirm the probe is properly oriented?

  The probe tip must be centered over the target area; ensure the reverse mounting bracket or hole provides enough structural support to prevent deflection.

• Does this probe require a specific target material?

  The transducer is calibrated for 4140 steel; ensure the target shaft material matches this specification or apply a calibration scale factor.

• How is a failed reverse mount probe detected?

  Failure is typically indicated by a "Gap Voltage" error on the monitor, resulting from internal wire breakage or damage to the probe tip during machine operation.