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Configured for shaft vibration and position monitoring in narrow-clearance mechanical housings, the Bently Nevada 330906-05-30-05-02-CN (3300 NSv Reverse Mount Probe) provides direct physical/electrical execution.

Suffix Breakdown & Model Matrix

The 330907 ordering options define the mechanical dimensions, cable length, connector type, and regional regulatory certifications:

  • 330907: Base Model for 3300 NSv Reverse Mount Probe (3/8-24 UNF thread)
  • 05: Unthreaded Length option - 0.5 in
  • 30: Overall Case Length option - 3.0 in
  • 05: Total Length option - 0.5 meter (20 inches)
  • 02: Connector Option - Miniature coaxial ClickLoc connector, standard cable
  • CN: Agency Approval Option - Country-specific approvals (China)

Hardware Specifications

Parameter Specification
Model 330907-05-30-05-02-CN
Brand Bently Nevada
Origin USA
Weight 3.0 kg (shipping weight)
Dimensions 3/8-24 UNF thread, 3.0 in overall case length
Operating Temp -51 to 177 deg C (probe assembly standard envelope)
Power Consumption Passive transducer powered via connected Proximitor Sensor loop
Thread / Mount Type 3/8-24 UNF reverse mount configuration
Unthreaded Length 0.5 in
Cable Assembly 0.5 meter (20 inches) standard coaxial cable lead
Connector Type Miniature coaxial ClickLoc connector
Agency Approvals Option CN (China country-specific certification)

Eddy-Current Probe Scaling & Gap Voltage Validation

The 3300 NSv reverse mount probe uses high-frequency eddy-current sensing fields designed for tight mechanical mounting spaces where standard 8 mm probes suffer from side-view interference. Eddy-current probe scaling generates a calibrated change in output voltage proportional to the distance between the probe tip and target shaft. During installation and field inspection, gap voltage validation requires verifying a static offset target of -10 VDC across the Proximitor Sensor output. Maintaining appropriate radial spacing between adjacent probes ensures cross-talk suppression in confined bearing housings.

Frequently Asked Questions

Q: How does the reverse mount design affect physical installation inside bearing housings?

A: The reverse mount probe inserts through the rear of a threaded bore or internal mounting bracket, allowing probe setting and securing from behind when access to the external casing face is blocked.

Q: What is required to maintain signal continuity across the miniature ClickLoc coaxial connector?

A: The miniature coaxial ClickLoc connector must be fully pushed together until the positive locking mechanism engages. Ensure the connection remains clean and protected against moisture or oil contamination.

Field Installation Guidelines

  1. Mechanical Mounting: Thread the reverse mount probe body into the internal 3/8-24 UNF mounting fixture from inside the housing until positioned near the shaft surface.
  2. Gap Voltage Setting: Adjust the axial probe distance while monitoring the Proximitor Sensor DC output voltage until reaching the standard -10 VDC gap setting.
  3. Locking Assembly: Tighten the internal lock nut against the mounting bracket to lock the probe position against operational machine vibration.
  4. Cable Routing: Route the 0.5-meter coaxial cable through protective metal conduit, observing a minimum bend radius of 25.4 mm (1.0 inch) to prevent internal conductor distortion.

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