330191-00-40-20-05 Bently Nevada 3300 XL ETR Proximity Probe

Product Overview

The Bently Nevada 330191-00-40-20-05 is an Extended Temperature Range (ETR) 8 mm proximity probe belonging to the industry-standard 3300 XL series.

This high-precision eddy current sensor measures static and dynamic distances between the probe tip and a target conductive surface.

Engineered for harsh industrial environments, it features patented TipLoc and CableLoc mechanics for exceptional physical resilience.

The 8 mm configuration provides a thick polyphenylene sulfide encapsulation to resist chemical attack and mechanical stress.

Machinery operators deploy this transducer system to achieve continuous, sub-micron vibration data on critical rotating assets.

Configuration Breakdown

The specific part number 330191-00-40-20-05 maps to the following mechanical and electrical hardware profile:

• Base Model (330191): 3300 XL 8 mm Extended Temperature Range Probe, 3/8-24 UNF thread, unarmored cable
• Unthreaded Length Option (00): 0.0 inches unthreaded case length
• Overall Case Length Option (40): 4.0 inches total case length
• Total Length Option (20): 2.0 meters (6.6 feet) integrated probe length (functions without an extension cable)
• Agency Approval Option (05): Multiple global hazardous area certifications including CSA, ATEX, and IECEx

Technical Specifications

• Brand: Bently Nevada
• Model Number: 330191-00-40-20-05
• Transducer Type: Eddy Current Proximity Probe
• Transducer Series: 3300 XL 8mm System
• Power Supply Input: Requires -17.5 Vdc to -26 Vdc (Nominal -23 Vdc to -26 Vdc when routed through safety barriers)
• Current Consumption: 12 mA maximum current draw
• Supply Sensitivity: Output variance remains under 2 mV per Volt change in the master input supply
• Output Resistance: 50 Ω nominal output impedance
• DC Loop Resistance: 7.88 ± 0.50 Ω center-conductor to outer-conductor path resistance
• Tip Material Base: Polyphenylene Sulfide (PPS) molded engineering plastic
• Case Structural Material: AISI 303 or 304 Stainless Steel (SST) housing
• Cable Core: 75Ω triaxial, Perfluoroalkoxy (PFA) insulated extended temperature range cable
• Tensile Strength Limits: 330 N (75 lbf) case-to-lead joint strength; 270 N (60 lbf) at the connector interface
• Connector Metallurgy: Gold-plated brass or gold-plated beryllium copper contacts
• Maximum Connector Torque: 0.565 N·m (5 in·lbf) maximum tightening torque
• Thread Engagement: 3/8-24 UNF thread with a 0.563-inch maximum engagement depth
• Sealing Subsystems: Integrated Viton O-ring seals differential pressure between the tip and steel case
• Total Mass Estimate: 323 grams per meter (11.4 oz/m)

Vibration Loop Diagnostic Capabilities

• Linear Range Tracking: Operating at voltages more positive than -23.5 Vdc alerts the system to a reduced linear range
• Signal Integrity Verification: Continuous tracking of DC sensor resistance flags open or shorted field cabling
• Sensor Identity Matching: Full entity parameter compliance is maintained when paired with matching 3300 XL Proximitor sensors
• Thermal Boundary Cross-checks: Decoupled temperature schedules classify environmental limits across Ga, Gc, and Dc environments

Thermal Classification Schedule

• EPL Ga and Gc (Gas Environments):
  • T1: -55°C to +232°C
  • T2: -55°C to +177°C
  • T3: -55°C to +120°C
  • T4: -55°C to +80°C
  • T5: -55°C to +40°C
• EPL Dc (Dust Environments):
  • T280°C: Ta = -55°C to +232°C
  • T225°C: Ta = -55°C to +177°C
  • T170°C: Ta = -55°C to +120°C
  • T130°C: Ta = -55°C to +80°C
  • T105°C: Ta = -55°C to +100°C
  • T90°C: Ta = -55°C to +40°C

Suitable Equipment & Application Scenarios

• Turbomachinery Bearings: Radial vibration, axial thrust position, and oil film clearance monitoring on high-speed journal bearings
• Steam & Gas Turbines: Continuous shaft relative vibration tracking inside utility-scale power generation trains
• Compressors & Pumps: Shaft eccentricity and speed sensing loops in heavy industrial centrifugal machinery
• Industrial Machinery Integration: Directly interfaces with Bently Nevada 3500/42M or 3500/40M monitor modules via the Proximitor sensor

Global PLC Spare HUB's Insight

The 2.0-meter configuration of the 330191-00-40-20-05 is highly reliable due to its structural simplicity. Because it implements a total length of 2.0 meters, it connects directly from the probe tip to the Proximitor sensor without an intermediate extension cable connector. Eliminating this secondary connection point removes a common source of calibration drift and signal attenuation. The PFA-insulated ETR cable provides outstanding dielectric stability up to 232°C, making it an excellent selection for turbine environments prone to severe thermal cycling.

Logistics, Warranty, & Compliance

• Factory Warranty: Includes a full 12-month industrial comprehensive warranty from the delivery date
• Global Delivery Couriers: Handled via express air networks including DHL, FedEx, and UPS
• Dispatch Window: Factory-packed items leave storage facilities within 24 to 48 hours of order processing
• Package Manifest: Contains one new and original proximity probe inside factory-certified protective packing
• Regulatory Certifications: Fully certified to meet CSA, ATEX, and IECEx strict safety parameters for explosive zones

Selection & Field Purchase Guide

• Verify that the 4.0-inch overall case length matches your machine casing penetration depth and bracket spacing
• Ensure the 3/8-24 UNF thread pattern matches the tapped mounting holes or sleeve adapters on the bearing housing
• If your process involves fluid submersion or external splashing, determine if a FluidLoc cable option is required instead

Frequently Asked Questions (FAQ)

Why does the 2.0-meter version of this probe operate without an extension cable?

The 2-meter probe length matches the baseline electrical calibration profile of a 2-meter Proximitor system directly, avoiding an intermediate connection.

What occurs if the input supply voltage drops more positive than the -23.5 Vdc limit?

The probe will experience a restricted linear measurement range, which may distort eddy current readings near the outer limits of the gap.

How does the patented TipLoc molding improve performance compared to older designs?

TipLoc provides a highly resilient mechanical bond between the PPS tip and the stainless steel case, preventing tip detachment under severe vibration.

Are these proximity probes pressure tested before leaving the factory?

No, while they incorporate a Viton O-ring to seal differential pressure between the tip and case, they are not pressure tested prior to shipment.

What is the significance of the 0.565 N·m maximum torque specification?

This torque limit protects the gold-plated threads and contacts on the triaxial connector from over-tightening damage during field mating.

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