Bently Nevada 330191-00-08-90-05 3300 XL ETR Proximity Probe Sensor

Product Overview

The Bently Nevada 330191-00-08-90-05 is a high-performance 3300 XL 8 mm ETR (Extended Temperature Range) proximity probe. Engineers design this sensor for non-contact vibration and position measurements on critical industrial machinery. The unit features a 3/8-24 UNF thread, a 0.0-inch unthreaded length, and a 0.8-inch case length. It incorporates a total length of 9.0 meters (29.5 feet) with PFA-insulated triaxial cable for severe thermal environments. Patented TipLoc molding ensures a secure bond between the PPS tip and stainless steel case. Furthermore, the CableLoc design provides 330 N (75 lbf) pull strength. This probe delivers robust, reliable performance under extreme physical and thermal stress.

Technical Specifications

• Brand: Bently Nevada
• Model Part Number: 330191-00-08-90-05
• Product Series: 3300 XL 8 mm Series
• Sensor Type: Extended Temperature Range (ETR) Proximity Probe
• Total Length Option: 9.0 meters (29.5 feet)
• Thread Type & Size: 3/8-24 UNF thread
• Unthreaded Length: 0.0 in
• Overall Case Length: 0.8 in
• Linear Range: Standard 2.0 mm (80 mils) nominal linear scale
• Scale Factor / Sensitivity: Standard 7.87 V/mm (200 mV/mil) with 3300 XL Proximitor Sensor
• Frequency Response: 0 Hz (DC) to 10 kHz (+0, -3 dB)
• Resolution: Sub-micron capability for precise shaft position tracking
• Power Requirements: -17.5 Vdc to -26 Vdc at 12 mA maximum
• Output Resistance: 50 Ω nominal
• DC Resistance (RPROBE): 9.87 ± 0.50 Ω (Center to Outer Conductor)
• Operating Temperature Range: -55°C to +232°C (-67°F to +450°F) for EPL Ga/Gc T1 rating
• Probe Tip Material: Polyphenylene sulfide (PPS)
• Probe Case Material: AISI 303 or 304 stainless steel (SST)
• Cable Material: 75Ω triaxial, perfluoroalkoxy (PFA) insulated
• Connector Material: Gold-plated brass or gold-plated beryllium copper
• Tensile Strength: 330 N (75 lbf) probe case to lead attachment
• Environmental Resistance: Viton O-ring pressure seal behind tip, optional FluidLoc oil blocking
• Interference Immunity: Triaxial shielded design suppresses external electromagnetic interference (EMI)

System Compatibility

The 330191-00-08-90-05 operates seamlessly as part of a complete matched eddy current transducer system. It interfaces directly with Bently Nevada 3300 XL Proximitor Sensors without requiring external extension cables for this 9-meter configuration. It integrates smoothly into Bently Nevada 3500 Series machinery monitoring systems and Bently Nevada 1900/27 machinery protection monitors.

Target Equipment Applications

• Heavy industrial steam and gas turbines
• Multistage centrifugal air and gas compressors
• High-pressure boiler feed pumps and process pumps
• Industrial gearboxes and speed reducers
• Large electric motors, generators, and hydro-turbines

Diagnostic & Monitoring Capabilities

This eddy current probe continuously generates precise proximity voltage signals. Control systems convert these signals into real-time condition monitoring metrics. It detects dynamic radial shaft vibration (orbit analysis) and keyphasor speed/phase timing. Additionally, it tracks static axial thrust position, thermal shaft expansion, and eccentricity. Maintenance teams rely on these diagnostics to catch early bearing wear and shaft misalignment before costly failures occur.

Agency Approvals & Certifications

The 05 Agency Approval Option provides global hazardous area certifications, including CSA, ATEX, and IECEx approvals. Classifications cover EPL Ga/Gc T1 through T5 zones (-55°C to +232°C) and dust environments (EPL Dc). This option ensures safe deployment in explosive gas and dust atmospheres worldwide.

Installation Guidelines

• Verify correct mechanical clearance and mounting thread depth (3/8-24 UNF).
• Avoid excessive cable twisting during probe body installation.
• Ensure target material matches the calibrated material standard (AISI 4140 steel default).
• Maintain a minimum probe tip clearance distance to surrounding metal to eliminate side-wall interference.
• Tighten electrical connectors precisely to the maximum torque of 0.565 N•m (5 in•lbf).
• Protect exposed connectors from moisture and conductive debris using proper connector protectors.

Commissioning & Maintenance Ease

The integrated 9-meter cable length simplifies installation by eliminating the intermediate connection point. Technicians can check probe health quickly using standard multimeter resistance checks (9.87 ± 0.50 Ω nominal). The gold-plated contacts resist corrosion, minimizing signal drift over extended operating intervals.

Packaging Details, Delivery & Warranty

• Condition: New & Original in Factory Packing
• Factory Warranty: 12 Months full coverage
• Standard Order Processing: Ships within 24 to 48 hours from order confirmation
• Express Courier Partners: FedEx, UPS, DHL worldwide express delivery

Global PLC Spare HUB's Insight

Our engineering team views the 330191-00-08-90-05 probe as an essential problem-solver for high-temperature vibration monitoring. Traditional FEP cables degrade quickly above 177°C. However, the PFA insulation on this ETR model withstands continuous exposure up to 232°C. Specifying the 9-meter total length eliminates intermediate extension connectors inside the hot machine casing. This single design choice removes a common source of signal noise and moisture contamination. It provides a long-term, low-maintenance sensing solution for steam turbines and hot gas compressors.

Frequently Asked Questions (FAQ)

Q: Does the 330191-00-08-90-05 require a separate extension cable?

A: No. This specific model features an integrated 9.0-meter total cable length. Nine-meter probe systems connect directly to the matching 9-meter Proximitor Sensor without using an extension cable.

Q: What is the main difference between standard FEP cable and this ETR PFA cable?

A: Standard FEP cables handle temperatures up to +177°C (+350°F). The Extended Temperature Range (ETR) PFA cable handles higher temperatures up to +232°C (+450°F), preventing insulation degradation in extreme heat.

Q: How can field engineers verify probe circuit integrity before installation?

A: Measure the DC resistance between the center conductor and outer conductor using a calibrated multimeter. A healthy 9-meter probe will read within the 9.87 ± 0.50 Ω specification range.

Q: What torque setting should I apply to the connector thread?

A: Always hand-tighten connectors first, then torque to a maximum limit of 0.565 N•m (5 in•lbf) to avoid damaging the gold-plated contact pins.

Q: Ordering Selection Guide: How do I select the right thread and armor options?

A: Match the thread size (3/8-24 UNF standard vs. metric M10x1) to your bearing housing tap. Choose option -08 for 0.8-inch case lengths when mounting space is tight. Select unarmored options (-90) when routing cable through conduit, or armored options when cable exposure to mechanical impact or sharp edges exists.

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