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Configured for shaft displacement and vibration measurement in rotating machinery monitoring networks, the Bently Nevada 330195-02-12-05-00 (330195 Reverse Mount Proximity Probe) provides direct physical/electrical execution. It operates by generating a localized eddy-current field at the probe tip to measure dynamic distances between the target shaft and the sensor, converting displacement into high-frequency voltage shifts processed by the downstream Proximitor sensor.

Suffix Breakdown & Model Matrix

Option Code Specification Parameter Value / Description
330195 Base Model 3300 XL 8 mm Reverse Mount Probe (3/8-24 UNF threads)
-02 Unthreaded Length Option 0.2 in
-12 Overall Case Length Option 1.2 in
-05 Total Length Option 0.5 metre (1.6 feet)
-00 Agency Approval Option Not required

Hardware Specifications

Parameter Specification
Model 330195-02-12-05-00
Brand Bently Nevada
Origin USA
Weight Approx 0.15 kg (Shipping Weight 2.0 kg)
Dimensions 3/8-24 UNF reverse mount body with 0.5 m cable
Operating Temp -51 deg C to +177 deg C (-60 deg F to +350 deg F)
Power Consumption Passive transducer (driven by external Proximitor loop supply)
Thread Type 3/8-24 UNF threads
Unthreaded Length 0.2 in
Overall Case Length 1.2 in
Total System Length 0.5 metre (1.6 feet)
Pressure Sealing Viton O-ring pressure seal (tip-to-case differential)
Agency Approval Not required (Option 00)

Mechanical Monitoring & Eddy-Current Transducer Performance

The 330195-02-12-05-00 proximity probe relies on precise eddy-current probe scaling to ensure linear voltage conversion over target operational distances. Installation requires strict gap voltage validation (-10 VDC targets) measured at the Proximitor output terminals to establish correct physical centering relative to the target shaft. Proper spatial mounting geometry must be enforced during reverse mount fitting to guarantee cross-talk suppression and eliminate mutual inductive interference between closely spaced probe tips.

Frequently Asked Questions

Q: What is the primary function of the integrated Viton O-ring in this reverse mount configuration?

A: The Viton O-ring forms a fluid seal between the probe tip and casing, designed to hold differential pressure across machine housing walls in fluid-film bearing applications.

Q: How is the -10.0 VDC baseline verified during field setup?

A: Adjust the axial depth of the reverse mount probe using a threaded sleeve while measuring output voltage at the Proximitor terminals until a steady -10.0 VDC is observed at the midpoint of the linear range.

Field Installation Guidelines

  1. Install the probe into the reverse mount housing, taking care to torque 3/8-24 UNF threads within standard mechanical limits to avoid casing deformation.
  2. Ensure the Viton O-ring sealing face is clean and free of abrasive particles before inserting into the machine casing wall.
  3. Keep miniature coaxial ClickLoc connector interfaces dry and uncontaminated during wiring pulls.
  4. Route the 0.5 metre probe cable through grounded metallic conduit away from high-voltage AC lines to prevent electromagnetic field interference.
  5. Verify total system length matching (0.5 metre probe combined with appropriate extension cable and Proximitor) to maintain calibration scale factor accuracy.

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