330105-02-12-50-02-CN Bently Nevada 3300 XL 8mm Reverse Mount Probe

Overview

The 330105-02-12-50-02-CN is a robust 3300 XL 8 mm Reverse Mount Proximity Probe developed by Bently Nevada. This transducer system is specifically designed to measure shaft vibration and position within industrial turbomachinery. It utilizes a reliable 3/8-24 mounting thread and advanced PPS tip technology to ensure consistent data acquisition under extreme process conditions.

Configuration Breakdown

• Base Series: 3300 XL 8 mm Reverse Mount Probes
  • Model: 330105-02-12 — Standard 3/8-24 Threaded Probe
  • Total Length: -50 — 5.0 meters
  • Connector: -02 — Miniature ClickLoc™ Coaxial Connector
  • Approval: -CN — Country Specific Agency Approval

Engineering Specifications

• Probe Thread: 3/8-24 UNF-2A
• Nominal DC Resistance: 8.73 ± 0.50 Ω (at 5.0m length)
• Operating Temp: -52°C to +177°C (Standard)
• Tip Material: Polyphenylene sulfide (PPS)
• Pressure Seal: Viton® O-ring (differential pressure rated)
• EMI Immunity: Tested to 300 Gauss (60 Hz)

Comparison & Selection Guide

Compare with: 330105-02-12-10-12-00

• Differences: The 330105-02-12-10-12-00 features a 1.0-meter cable whereas the 330105-02-12-50-02-CN is a 5.0-meter configuration.
• Selection Advice: Ensure your mounting requirement matches the 3/8-24 thread engagement. Proximity probe signal rolloff occurs over longer cable runs; always ensure your Proximitor sensor is calibrated correctly for the specific loop length.

Global PLC Spare HUB's Insight

Our analysis defines the 330105-02-12-50-02-CN as the gold standard for "reverse mount" configurations where the probe is installed from inside the machine casing. Its immunity to magnetic fields (up to 300 Gauss) makes it ideal for generators and large centrifugal compressors. The ClickLoc connector is highly resistant to thermal cycling, preventing the intermittent electrical shorts common in cheaper transducer alternatives.

Applications & Diagnostics

• Target Equipment: Hydro-electric turbines, centrifugal compressors, and gas expansion sets.
• Diagnostic Capability: Real-time radial vibration, shaft eccentricity, and axial thrust measurement.
• Integrity: Gold-plated ClickLoc connectors minimize impedance fluctuations in harsh electromagnetic environments.

Logistics & Quality Assurance

• Shipping: Expedited global transit via FedEx, UPS, and DHL.
• Dispatch: Orders are processed within 24-48 hours.
• Warranty: 12-month manufacturer performance warranty.

Technical FAQ

Q: What are the risks of exposing this probe to temperatures below -34˚C?
A: Operating below this threshold can cause the Viton O-ring pressure seal to harden, leading to potential failure of the hermetic seal and gas migration.

Q: How does the "Reverse Mount" design differ from standard probes?
A: Reverse mount probes are designed to be threaded through the internal side of a bearing housing, with the probe cable exiting the interior of the machine.

Q: Can I replace a standard probe with an "Extended Temperature" version?
A: Only if the entire loop (probe, extension cable, and Proximitor sensor) is calibrated for the specific system length; mixing temperature grades without recalibration will alter the Scale Factor.

Q: How often should I check the gap setting?
A: It is recommended to perform a "Gap Voltage" check during every major outage; nominal gap voltage should be monitored to ensure the probe remains in the linear measurement range.

Q: Selection Advice: Why does the DC resistance vary with cable length?
A: DC resistance is a function of conductor length and material; longer cables have higher resistive losses, which is why the 5.0m probe has a specific RPROBE value of 8.73 Ω ± 0.50 Ω.

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