The Bently Nevada 330851-06-000-070-10-00-05, also cataloged as the 330851-06-000-070-10-00-05 Proximity Probe, operates as a dedicated hardware component for non-contact displacement measurement within vibration monitoring systems.

Suffix & Model Matrix

• Series: 3300 XL 25 mm
• Thread Specification: M39 x 1.5
• Unthreaded Length: 0 mm
• Total Length: 1.0 meter (3.3 feet)
• Armor Option: None
• Agency Approval: Multiple Approvals

Hardware Specifications

Mechanical Monitoring & TSI Properties

The transducer assembly employs eddy-current probe scaling to convert target proximity into a linear voltage signal. System accuracy is contingent upon rigorous gap voltage validation to maintain -10 VDC targets under nominal operating conditions. During installation, technicians must account for rotor dynamics to minimize signal distortion, and ensure adequate cross-talk suppression by maintaining spatial isolation from adjacent high-frequency sensing elements within the machine casing.

Ordering info

1. 1 x 330851-06-000-070-10-00-05 Proximity Probe
2. 1 x M39 x 1.5 mounting nut
3. 1 x Installation documentation

Field Installation Guidelines

• Mounting: Ensure the M39 x 1.5 thread is fully seated in the support bracket; avoid mechanical stress on the probe body during tightening.
• Gap Setting: Calibrate the probe-to-target distance to achieve the required DC voltage offset for the target material.
• Grounding: Verify the probe tip is electrically isolated from the mounting structure to prevent ground loop interference.
• Routing: Ensure the cable path minimizes exposure to high-temperature zones and avoids proximity to high-current conductors.

Frequently Asked Questions

• What is the specific application for the 25 mm probe tip?

  The 25 mm tip diameter provides an extended linear range, suitable for measuring large-amplitude displacements on massive rotating machinery components.

• Does this model require an extension cable?

  This model is a probe assembly; it must be connected to a matching Bently Nevada extension cable and Proximitor sensor calibrated for the 25 mm system.

• How is the M39 thread used in installation?

  The M39 x 1.5 thread is designed for heavy-duty mounting, allowing for precise axial adjustment of the probe tip relative to the target surface.

• Can this probe be used in hazardous locations?

  The Multiple Approvals suffix indicates compliance with various international hazardous area certification standards; verify specific regional requirements before installation.

• What is the impact of target material on signal output?

  The output signal is calibrated for 4140 steel; other materials will require a known scaling factor to maintain displacement measurement accuracy.

• Is the probe tip sensitive to fluid immersion?

  The probe is designed for operation in common industrial lubricants and gases; ensure chemical compatibility with the probe tip material before extended immersion.

• How should the gap voltage be measured?

  Use a high-impedance digital multimeter to measure the DC voltage at the Proximitor sensor output terminals during the static gap calibration process.

• What is the minimum clearance between probes?

  To maintain cross-talk suppression, adhere to the minimum spacing guidelines defined in the Bently Nevada 3300 XL installation manual to avoid signal beating.