330191-00-33-15-05 | Bently Nevada 3300 XL 8mm ETR Probe

Product Overview

When machine vibration threatens production uptime, the Bently Nevada 330191-00-33-15-05 delivers the precise measurement you need. This 3300 XL 8 mm ETR proximity probe is engineered for reliable shaft vibration and position monitoring in critical rotating machinery. As part of the trusted 3300 XL family, it combines rugged construction with advanced sensing technology to help you avoid unplanned downtime and protect your assets.

The 330191-00-33-15-05 features a 3/8-24 UNF thread and a 1.5-meter total cable length, making it suitable for a wide range of installation configurations. With multiple agency approvals, this probe meets diverse regulatory requirements, simplifying compliance for global operations.

Technical Specifications

Every specification of the 330191-00-33-15-05 is designed to deliver consistent, accurate performance in demanding industrial environments:

Model: 3300 XL 8 mm ETR Probe, 3/8-24 UNF thread, without armor

Total Length Option: 1.5 meters (4.9 feet)

Overall Case Length: 3.3 inches

Unthreaded Length: Minimum 0.0 inches (with 0.563 inches thread engagement)

Agency Approval: Multiple Approvals

Supply Power: Requires -17.5 Vdc to -26 Vdc (with nonincendive circuit per drawing 140979), -23 Vdc to -26 Vdc with barriers, at 12 mA max consumption

Sensitivity: Less than 2 mV change in output voltage per volt change in input voltage

Output Resistance: 50 Ω

Probe DC Resistance: 7.73 Ω ± 0.50 Ω (for 1.5 m probe)

Probe Tip Material: Polyphenylene sulfide (PPS)

Probe Case Material: AISI 303 or 304 stainless steel

Cable: 75Ω triaxial, FEP insulated (standard) or PFA insulated (extended temperature) in lengths 0.5, 1, 1.5, 2, 3, 5, or 9 meters

Armor: Optional flexible AISI 302/304 SST with FEP outer jacket

Tensile Strength: 330 N (75 lbf) probe case to lead; 270 N (60 lbf) at connectors

Connector: Gold-plated brass or beryllium copper, max torque 0.565 N•m (5 in•lbf)

Probe Case Thread: 3/8-24, max engagement 0.563 in

Weight: 323 g/m (11.4 oz)

Temperature Classification: For EPL Ga/Gc: 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; For EPL Dc: various ratings up to 280°C

These parameters ensure the probe delivers stable, repeatable measurements even under challenging thermal and mechanical stress.

Industry Applications

The 330191-00-33-15-05 is ideal for monitoring vibration and axial position in turbines, compressors, pumps, and other rotating equipment. In petrochemical plants, where continuous operation is critical, this probe helps detect early signs of bearing wear or shaft misalignment, enabling predictive maintenance that reduces costly downtime.

In power generation, the probe's robust design and wide temperature range make it suitable for high-temperature environments. Its multiple approvals also facilitate deployment in hazardous areas, provided proper barriers are used.

Installation & Setup

Proper installation is key to accurate readings. Mount the probe with the 3/8-24 UNF thread, ensuring the unthreaded length is at least 0.0 inches and the thread engagement does not exceed 0.563 inches. Use the recommended torque of 0.565 N•m (5 in•lbf) on connectors to avoid damage.

For one-meter systems, no extension cable is needed. For longer runs, use Bently Nevada extension cables to maintain signal integrity. Always follow the installation drawing 140979 when connecting to nonincendive circuits.

Maintenance & Reliability

The 3300 XL probe's patented TipLoc and CableLoc designs provide a robust bond and 330 N (75 lbf) pull strength, reducing the risk of cable damage. The PPS probe tip and stainless steel case resist harsh environments, but periodic inspection is recommended to ensure no physical damage or contamination affects performance.

Check cable connections for tightness and inspect for wear, especially in high-vibration areas. The Viton® O-ring seals the probe tip, but probes are not pressure tested before shipment, so verify sealing integrity in pressurized applications.

Selection Guide & Purchasing Advice

When selecting the 330191-00-33-15-05, confirm the total length (1.5 m) and thread type (3/8-24 UNF) match your machine's requirements. If you need armored cable, consider ordering the optional armor version. For extended temperature ranges, choose the PFA insulated cable option.

BluePLC Industrial offers this probe as new and original in factory packing, backed by a 12-month warranty. Contact our team to verify lifecycle status and availability before ordering.