Configured for radial vibration and axial position measurement in rotating machinery, the Bently Nevada 330876-01-10-00-00 (330876-01-10-00-00 Proximity Probe) provides direct physical execution of displacement sensing via eddy-current induction within 3300 XL monitoring systems.

Model Suffix Decomposition

The 330876-01-10-00-00 part number indicates the following hardware configuration:

• 330876: 3300 XL NSv Proximity Probe.

• 01: 5 mm probe tip diameter.

• 10: 10 mm case length (threaded).

• 00: Connector assembly without armor.

• 00: No agency approval options.

Hardware Specifications

Mechanical Monitoring and Rotor Dynamics

The 3300 XL NSv system relies on accurate eddy-current probe scaling to translate target displacement into a voltage signal proportional to the rotor position. To ensure data integrity, the probe must be installed with a target gap voltage of -10 VDC at the Proximitor sensor output. Rotor dynamics analysis is highly sensitive to probe mounting; therefore, the assembly must be secured to a rigid bracket to prevent resonance. Furthermore, effective cross-talk suppression is achieved by maintaining specified physical spacing between adjacent probes, which prevents mutual interference of high-frequency carrier signals.

Ordering info

• 1 x 330876-01-10-00-00 5 mm NSv Proximity Probe

• 1 x Stainless steel lock nut

• 1 x Calibration data sheet

Field Installation Guidelines

• Probe Mounting: Install in a non-conductive, rigid bracket to ensure signal stability and prevent parasitic capacitance.

• Gap Setting: Verify the output voltage at the Proximitor end. The probe must be adjusted until the DC gap voltage measures -10 VDC.

• Cable Handling: Maintain a minimum static bend radius of 25 mm to prevent impedance changes within the coaxial assembly.

• Grounding: Ensure the probe housing is electrically continuous with the machine casing unless electrical isolation is required by the monitoring system design.

Frequently Asked Questions

• Q: Can this probe be used in high-temperature environments?

  A: Yes, the probe is rated for continuous operation within a temperature range of -51 deg C to +177 deg C.

• Q: Is the probe tip replaceable?

  A: No, the PPS probe tip is permanently bonded to the stainless steel housing as an integrated assembly.

• Q: What is the purpose of the -10 VDC gap voltage target?

  A: This target ensures the Proximitor output operates within its linear range for accurate displacement measurements.

• Q: Can I use this probe with 3500 series monitors?

  A: Yes, provided the probe is connected to a compatible 3300 XL NSv Proximitor sensor.

• Q: What is the maximum linear range of this probe?

  A: The linear range is 1.5 mm, which is specific to the NSv design for smaller target applications.

• Q: Does the probe housing require special shielding?

  A: No, the housing provides basic protection; however, the coaxial cable should be routed through conduit to minimize electrical interference.

• Q: How does material composition affect measurement?

  A: Calibration is based on 4140 steel; using different target materials will alter the probe scaling factor and require recalibration.

• Q: What is the consequence of a loose lock nut?

  A: A loose nut may allow the probe to vibrate or shift, causing significant measurement drift and signal noise in the monitoring data.