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The Bently Nevada 330904-04-14-05-02-00, also cataloged as the 330904 Proximity Sensors, operates as a dedicated hardware component for non-contact shaft vibration and positional displacement monitoring within 3300 XL NSv Machinery Monitoring System platforms. The transducer assembly features a 40 mm unthreaded length, a 140 mm overall case length, and a 0.5 m (20 in) standard coaxial cable terminated with a miniature coaxial ClickLoc connector.

Suffix Breakdown & Model Matrix

Option Code Parameter Designation Selected Configuration
330904 Base Model 3300 XL NSv Proximity Sensor
-04 Unthreaded Length 40 mm
-14 Overall Case Length 140 mm
-05 Total Length Option 0.5 m (20 in)
-02 Connector & Cable Type Miniature coaxial ClickLoc connector, standard cable
-00 Agency Approval Option No certificates required

Hardware Specifications

Parameter Specification
Model 330904-04-14-05-02-00
Brand Bently Nevada
Origin United States
Weight 0.45 kg (1.0 lb)
Dimensions Threaded probe body (40 mm unthreaded / 140 mm case length)
Operating Temp -51 deg C to +177 deg C (-60 deg F to +350 deg F)
Power Consumption Passive transducer (Powered via Proximitor Sensor)
Cable Type 75 Ohm coaxial, FEP insulated, standard cable
Connector Type Miniature coaxial ClickLoc connector
Unthreaded Length 40 mm
Overall Case Length 140 mm
Total Cable Length 0.5 m (20 in)
Agency Approvals None required (Option 00)

Mechanical Monitoring & TSI Performance

Designed specifically for installations with narrow side-view clearances or counterbored mounting holes, the 330904-04-14-05-02-00 probe executes precision rotor dynamics monitoring on small-diameter shafts. When paired with a matching 3300 XL NSv Proximitor Sensor, eddy-current probe scaling produces a linear output voltage directly proportional to target surface gap distance. Achieving proper gap voltage validation (targeted at -10 VDC during installation) ensures proper linear positioning, optimal dynamic measurement range, and effective cross-talk suppression between closely spaced probe channels.

Frequently Asked Questions

Q: What gap voltage should be targeted when setting up the 330904-04-14-05-02-00 probe mechanically?

A: Adjust physical probe insertion depth until the output voltage from the connected Proximitor Sensor reads -10 VDC, which corresponds to the midpoint of the calibrated linear range.

Q: Can the 0.5 m probe cable be wired directly to the TSI rack monitoring terminal?

A: No. The 0.5 m (20 in) integrated probe cable requires a matching 3300 XL NSv extension cable to establish the complete 5 m or 7 m total system length required by the Proximitor Sensor.

Q: How does the NSv probe tip profile differ from standard 8 mm proximity probes?

A: The NSv tip profile is engineered with a smaller magnetic footprint, allowing accurate vibration readings in narrow counterbores and tight spatial locations where standard 8 mm probes suffer from side-wall interference.

Field Installation Guidelines

  1. Thread the probe casing into the mounting bracket or sleeve port using appropriate wrenches; avoid over-torquing to protect case threads.
  2. Verify that thread engagement meets standard mechanical locking tolerances (e.g., minimum 5 full threads engaged).
  3. Ensure the target shaft surface is free of deep mechanical scratches, rust, or magnetic runout prior to taking initial zero-gap readings.
  4. Clean the ClickLoc connector faces to remove residual grease or dirt before locking the coaxial coupling ring into position.

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