330730-040-12-00 Bently Nevada 3300 XL Cable Sensor Extension

Product Overview

The Bently Nevada 3300 XL 330730-040-12-00 is a heavy-duty 11 mm proximity transducer extension cable.

Engineers design this 4-meter unit for non-contact vibration and axial position measurement.

It carries high-frequency eddy current signals between the sensing probe and Proximitor sensor.

The patented FluidLoc design blocks oil migration through the internal conductor core.

An integrated connector protector guards electrical joints in wet rotating machinery bays.

Configuration Breakdown

The matrix below outlines part suffix specifications for model 330730-040-12-00.

Technical Architecture & Parameters

Technical parameters are organized below into clear structural categories.

• System Performance Parameters
  • Brand: Bently Nevada
  • Series: 3300 XL 11 mm System
  • Model: 330730-040-12-00
  • Total System Length: 5 or 9 meters (probe plus extension cable)
  • Linear Measurement Range: 4.0 mm (160 mils), spanning -1 Vdc to -17 Vdc
  • Extended Range (DSL): 0.5 mm to 5.0 mm (20 to 200 mils), spanning -1 Vdc to -19 Vdc
  • Recommended Gap Setting: 2.5 mm (100 mils) target distance
  • Incremental Scale Factor (ISF): 3.94 V/mm (100 mV/mil) +/-10%
• Electrical Characteristics
  • Capacitance Density: 69.9 pF/m (21.3 pF/ft) typical
  • Core Conductor Resistance (RCORE): 1.0 +/- 0.25 Ohms
  • Coaxial Jacket Resistance (RJACKET): 0.3 +/- 0.1 Ohms
  • Dielectric Material: 75 Ohm triaxial fluoroethylene propylene (FEP) insulation
  • Connector Plating: Corrosion-resistant gold-plated brass contacts
• Mechanical & Environmental Tolerances
  • Operating & Storage Temperature: -52 °C to +177 °C (-62 °F to +351 °F)
  • Net Cable Weight: Unarmored 45 g/m (0.5 oz/ft) / Total ~0.18 kg
  • Tensile Rating (Probe-to-Lead): 330 N (75 lbs) maximum rating
  • Tensile Rating (Lead-to-Extension): 270 N (60 lbs) maximum rating
  • Field Wiring Range: 0.2 to 1.5 mm2 (16 to 24 AWG) shielded triad wire

Selection Comparison & Technical Advice

Compare key specs below between model 330730-040-12-00 and alternative variants.

Technical Selection Advice:

Select the 330730-040-12-00 for unarmored conduit runs inside oil-filled bearing housings.

The FluidLoc core prevents turbine oil from wicking along internal conductor strands into junction boxes.

When long external cable runs require physical impact resistance or explosion-proof certifications, select the 330730-080-03-05 instead.

Target Equipment & Application Scenarios

Turbomachinery operators rely on this extension cable for critical health monitoring.

• Steam & Gas Turbines: Monitors rotor shaft position and main bearing vibration levels.
• Centrifugal Compressors: Measures high-speed axial displacement under heavy process loads.
• Large Boiler Feed Pumps: Tracks radial shaft tilt and bearing wear during continuous operations.
• Gearboxes & Generators: Connects internal sensors through oil splash zones to external junction boxes.

Diagnostic Capabilities & Field Integrity

Proper electrical characteristics enable continuous online monitoring system diagnostics.

The Proximitor sensor measures core resistance (RCORE) and jacket resistance (RJACKET) continuously.

An open core circuit or ground fault shifts the DC bias voltage out of the -1 Vdc to -17 Vdc linear window.

This voltage anomaly triggers instant NOT OK alarm states on Machinery Protection Systems.

The pre-installed connector protector prevents moisture ingress from degrading signal frequency response.

Global PLC Spare HUB's Insight

Our machinery monitoring specialists supported a power plant during a gas turbine overhaul.

The plant reported intermittent NOT OK alarms on their thrust bearing proximity channels.

Inspection revealed turbine lube oil had wicked through standard cables into the dry junction box.

Oil saturation altered signal capacitance and created high-frequency signal roll-off errors.

Replacing worn lines with the 330730-040-12-00 FluidLoc cable solved oil leakage completely.

Its rubber connector boot prevented moisture contamination during high-pressure washdowns.

Selection & Installation Guide

Follow these field engineering guidelines before installing sensor extension cables.

• Calculate total system length carefully to ensure matching with 5 m or 9 m Proximitor calibrations.
• Use silicone tape only when connector protectors are unavailable and oil exposure is absent.
• Avoid installing silicone-wrapped connections directly inside active turbine oil sump compartments.
• Maintain minimum bend radii to prevent internal coaxial dielectric insulation strain.
• Verify that field wiring uses shielded triad cable for distances up to 305 meters (1000 feet).

Packaging, Logistics & 12-Month Warranty

We supply authentic industrial monitoring hardware with complete logistics support.

• Package Contents: 1 x Bently Nevada 330730-040-12-00 cable in sealed protective packaging.
• Warranty Coverage: Complete 12-Month replacement warranty included with purchase.
• Global Express Courier: Direct international express delivery via FedEx, UPS, or DHL.
• Dispatch Lead Time: Standard orders ship out within 24 to 48 hours after payment processing.

Frequently Asked Questions

Q: What specific functional benefit does the FluidLoc option offer?

A: It prevents oil and pressurized fluids from leaking through internal cable strands into external enclosures.

Q: Can I use silicone tape inside an oil-filled bearing casing?

A: No. Standard silicone wrapping degrades when exposed continuously to hot synthetic turbine oils.

Q: How does cable length affect total proximity transducer system calibration?

A: Extension cable length must match the Proximitor sensor calibration tuning (5-meter or 9-meter overall length).

Q: What is the maximum recommended field wiring distance from Proximitor to monitor?

A: You can run up to 305 meters (1000 feet) of 16-24 AWG shielded triad field cable.

Q: How quickly will my shipment dispatch after order confirmation?

A: We process and dispatch all orders within 24 to 48 hours using express couriers like FedEx, UPS, or DHL.

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