330302-000-011-10-90-00-00 Bently Nevada High Temp Probe

Product Overview

The 330302-000-011-10-90-00-00 Bently Nevada 3300 High Temperature Probe provides precise non-contact vibration measurement under extreme thermal conditions.

Machinery condition monitoring architectures rely on this eddy current transducer for shaft displacement, vibration, and position tracking up to +350°C (+662°F).

Built with a ceramic probe tip and an AISI 316L stainless steel housing, the assembly delivers exceptional mechanical resilience against harsh industrial gas paths.

The integrated hardline cable transitions high-temperature signals cleanly from internal bearing cavities out to field terminal connections.

Part Number Suffix & Configuration Breakdown

The hierarchical tree below details the exact option code structure for the 330302-000-011-10-90-00-00 using MECE principles:

• 330302 — Bently Nevada 3300 High Temperature Probe
  • 000 — Unthreaded Case Length: 0 mm (Fully threaded case profile)
  • 011 — Overall Case Length: 11 mm case length
  • 10 — Hardline Cable Length: 1.0 meter (3.3 feet) high-temperature hardline lead
  • 90 — Total System Length: 9.0 meters (30 feet) total length (includes extension cable)
  • 00 — Extension Cable Armor: Without stainless steel protective armor
  • 00 — Agency Approval: Standard non-approved configuration

Technical Specifications Table

Target Equipment & Application Scenarios

• Gas Turbines & Exhaust Frames: Monitors rotor shaft displacement inside hot gas paths and bearing housings where standard PPS tips melt.
• Steam Turbine Exhaust Valves: Tracks valve stem position and thermal expansion movement under continuous elevated steam temperatures.
• High-Temperature Hot Gas Expanders: Measures dynamic radial vibration near main shaft seals exposed to extreme process heat.

Advanced Diagnostic Capabilities

The 330302-000-011-10-90-00-00 outputs a linear raw voltage signal proportional to the physical gap between the ceramic probe tip and target shaft.

Diagnostic monitoring systems utilize this signal to render orbit plots, average shaft position trends, and spectral vibration profiles.

Field engineers monitor real-time thermal growth and detect early-stage shaft unbalance, bow, or thermal eccentricity in turbomachinery.

Global PLC Spare HUB's Insight & Field Experience

During an overhaul of a combined-cycle power plant gas turbine, standard proximity probes continuously failed due to high thermal degradation near the turbine exhaust frame.

The intense ambient heat softened standard polymer tips, causing signal drift and false high-vibration alarms.

Our technical team recommended deploying the ceramic-tipped 330302-000-011-10-90-00-00 high-temperature transducer.

The ceramic construction and 316L stainless steel hardline cable withstood continuous operational temperatures exceeding +300°C without signal attenuation.

This replacement eliminated false trips, maintaining stable vibration monitoring across the entire peak-demand operating season.

Packaging, Delivery & Warranty Terms

Every 330302-000-011-10-90-00-00 probe is thoroughly tested and packaged in protective anti-static wrap to ensure original factory integrity.

Orders ship within 24 to 48 hours via global express couriers including FedEx, UPS, and DHL.

All purchases include full 12-month warranty coverage against manufacturing defects.

Frequently Asked Questions (FAQ)

Q1: Why is ceramic material used for the probe tip instead of standard polyphenylene sulfide (PPS)?

A1: Ceramic retains structural rigidity and electrical insulation properties at temperatures up to +350°C, whereas standard PPS degrades above +177°C.

Q2: What overall system length configuration does the 90 suffix code represent?

A2: Suffix 90 indicates a complete 9.0-meter (30-foot) total electrical system length, which includes the probe, hardline cable, and matched extension cable.

Q3: How does thermal expansion affect the target gap setting in high-temperature installations?

A3: Because heat expands machine casings and shafts, engineers must calculate thermal growth vectors and set cold mounting gaps to ensure the probe remains within its 4.0 mm linear range at operating temperatures.

Q4: Can the hardline cable section be bent sharply during field routing inside bearing housings?

A4: No, hardline stainless steel cable requires minimum bend radius considerations; sharp crimping damages internal coaxial insulation and alters system impedance.

Q5: What essential checks should engineers perform to verify proper impedance match when installing spare high-temp probes?

A5: Verify that the total probe DC resistance matches 5.06 Ω, ensure system length components match 9.0 meters total, and confirm your supplier provides a 12-month warranty.

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