Configured for shaft displacement monitoring in rotating machinery, the Bently Nevada 330171-00-20-05-02-00 (330171 5 mm Proximity Probe) provides direct physical signal acquisition for mechanical protection systems.

Model Matrix & Configuration

• Model: 330171 (3300 5 mm Probe)

• Mounting Thread: 1/4-28 UNF

• Overall Case Length: 2.0 in

• Unthreaded Length: 0.0 in

• Cable Length: 0.5 meter (1.6 feet)

• Connector: Miniature coaxial ClickLoc

• Cable Type: Standard

Hardware Specifications

Mechanical Monitoring and Signal Behavior

The transducer operates via eddy-current proximity sensing to generate a linear voltage output proportional to the target shaft gap. Reliable rotor dynamics analysis necessitates accurate gap voltage validation; typical system configurations target a -10 VDC output at the nominal gap center. Cross-talk suppression is maintained by ensuring adequate spatial separation between adjacent probe installations to avoid carrier frequency interference. Signal integrity depends on the system path (probe, extension cable, and Proximitor) remaining within factory-calibrated impedance limits.

Ordering Info

• 330171-00-20-05-02-00 Proximity Probe unit

• Integrated 0.5 m coaxial cable

• 1/4-28 UNF mounting nuts (2x)

• Documentation is not included as part of the standard ship set

Field Installation Guidelines

• Surface Integrity: Ensure the target shaft surface is clean, smooth, and free of defects to prevent measurement non-linearity.

• Threading: Utilize the 1/4-28 UNF thread for precise axial positioning within the housing; tighten locking nuts to secure the probe against mechanical vibration.

• Grounding: Maintain a stable electrical ground reference for the probe body to minimize electromagnetic interference.

• Cabling: Avoid tight bends in the coaxial cable; observe the minimum bend radius to prevent dielectric fatigue and impedance changes.

• Mounting: Confirm the probe tip does not contact the target during machine transients or thermal expansion cycles.

Delivery Information

• Delivery time: 2-7 days when payment finish.

• Logistics: Global dispatch via DHL, FEDEX, or UPS.

• Packaging: All components are protected using anti-static industrial packaging to prevent electrostatic discharge and mechanical shock.

Frequently Asked Questions

• Q: Can this 5 mm probe be used with 8 mm system Proximitors?

  A: No, the Proximitor must be matched to the specific probe tip diameter to maintain correct scaling and linear range.

• Q: What is the purpose of the 0.5 m cable length?

  A: It is designed for applications where the Proximitor is mounted in close proximity to the probe, reducing the total system loop length.

• Q: Is this probe compatible with high-temperature environments?

  A: The component is rated for operation up to 177 deg C, suitable for standard industrial turbine and compressor applications.

• Q: How do I adjust the air gap?

  A: Rotate the probe within the threaded housing until the desired gap voltage is measured at the Proximitor terminal, then tighten the lock nuts.

• Q: Is the ClickLoc connector waterproof?

  A: It is environmentally sealed for industrial use, but it is not intended for direct submersion in non-compatible chemical environments.

• Q: Does this model require an agency approval option?

  A: The specific part number provided does not include additional hazardous area agency approvals (00 option).

• Q: What is the target material for the calibration?

  A: Standard calibration is performed against AISI 4140 steel; using different shaft materials may require scale factor adjustment.

• Q: Can I shorten the cable?

  A: Shortening the cable will alter the system impedance and invalidate the calibration; cable length must remain as factory-specified.