330302-000-011-20-90-01-05 Bently Nevada 3300 Probe

Product Overview

The Bently Nevada 3300 330302-000-011-20-90-01-05 is a heavy-duty high temperature proximity sensor probe.

Engineers deploy this transducer for non-contact shaft displacement and vibration measurements in extreme thermal environments.

It features a ceramic tip and an AISI 316L stainless steel case with hardline mineral-insulated cabling.

The sensor withstands direct continuous operating temperatures reaching up to +350 °C (+662 °F).

An integrated stainless steel armored extension cable provides robust protection against severe physical strain.

Configuration Breakdown

The structured list below details the exact part number breakdown for model 330302-000-011-20-90-01-05.

• Model Identifier: 330302 (3300 Series High Temperature Proximity Probe)
  • Unthreaded Length Option: 000 (0 mm unthreaded length)
  • Overall Case Length Option: 011 (11 mm case length)
  • Hardline Cable Length Option: 20 (2.0 meters / 6.6 feet hardline cable)
  • Total System Length Option: 90 (9.0 meters / 30 feet total length including extension cable)
  • Extension Cable Armor Option: 01 (Flexible stainless steel protective armor)
  • Agency Approval Option: 05 (Multiple international hazardous area certifications)

Technical Specifications & Parameters

The parameters below outline structural and electrical performance characteristics across extreme thermal conditions.

Selection Comparison & Engineering Guidance

Compare key structural differences below between model 330302-000-011-20-90-01-05 and alternative sensor configurations.

Engineering Selection Guidance:

Select the 330302-000-011-20-90-01-05 when ex-proof certifications are mandatory and the cold terminal junction box sits within 2.0 meters of the hot turbine wall.

If the hot turbine casing insulation envelope extends further, choose the 330302-000-011-50-90-01-00 to position soft extension cable joints outside high-heat zones.

Target Equipment & Application Scenarios

Industrial plants install high temperature proximity transducers in severe thermal processing zones.

• Gas Turbines: Measures thermal growth and shaft expansion inside combustor and turbine housings.
• Steam Turbines: Monitors rotor position and dynamic vibration near high-pressure steam seals.
• Hot Gas Expanders: Tracks radial vibration on heavy shaft bearings exposed to superheated process gases.
• Petrochemical Reactors: Measures mechanical displacement inside high-temperature vessel penetrations.

Diagnostic Capabilities & Field Performance

The 330302-000-011-20-90-01-05 maintains steady DC voltage bias during extreme heat cycles.

The Proximitor sensor measures coil resistance continuously across the 5.82 Ohm baseline.

Internal short circuits or open hardline conductors alter circuit impedance, driving the gap voltage beyond the linear baseline (-1 Vdc to -17 Vdc).

Machinery protection monitors trigger immediate NOT OK channel alarms when thermal stress degrades signal wiring.

Global PLC Spare HUB's Insight

Our field machinery team evaluated a power station gas turbine exhibiting intermittent shaft position errors.

Standard proximity cables melted due to severe heat radiation near the exhaust frame housing.

Replacing standard sensors with the 330302-000-011-20-90-01-05 ceramic-tip probe eliminated thermal breakdown.

The 2.0-meter hardline cable routed heat safely away from the soft extension wire connectors.

The stainless steel armor prevented mechanical abrasion from nearby hot pipe supports during thermal expansion cycles.

Installation & Mounting Recommendations

Follow these field installation rules to maximize high-temperature sensor lifespan.

• Ensure target surfaces meet the minimum 30.5 mm flat area requirement for accurate calibration.
• Never bend rigid mineral-insulated hardline cables beyond minimum recommended bend radii limits.
• Position hardline-to-extension cable connections outside ambient thermal zones exceeding +177 °C (+351 °F).
• Use pre-drilled safety wire holes on mounting hardware to prevent loosening from high-frequency shaft vibration.

Procurement, Logistics & 12-Month Warranty

We supply original industrial instrumentation globally with complete warranty and shipping coverage.

• Included Package: 1 x Bently Nevada 330302-000-011-20-90-01-05 unit with integrated extension cable.
• Warranty Terms: Covered by a full 12-Month replacement warranty.
• Global Courier Network: Express dispatch using reliable carriers like FedEx, UPS, or DHL.
• Dispatch Schedule: All orders ship within 24 to 48 hours after payment verification.

Frequently Asked Questions

Q: What operating temperature limit can the probe tip sustain continuously?

A: The ceramic probe tip and hardline section withstand continuous heat up to +350 °C (+662 °F).

Q: Why is ceramic used for the probe tip instead of standard plastic?

A: Ceramic withstands extreme heat without softening, cracking, or degrading signal transmission.

Q: Can the hardline section be bent during field installation?

A: Yes, but technicians must use proper bending tools to prevent cracking internal mineral insulation.

Q: How do thermal expansion changes affect system linearity?

A: The system maintains ISF within +/-30% across the full temperature range from -22 °C to +350 °C.

Q: What express shipping options are available for urgent turbine overhauls?

A: We ship orders internationally via express FedEx, UPS, or DHL within 24 to 48 hours.

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