330191-00-08-90-05 | Bently Nevada 3300 XL 8mm Proximity Probe

Product Overview

When machine vibration threatens uptime, the Bently Nevada 330191-00-08-90-05 delivers precise, reliable measurement. This 3300 XL 8 mm ETR proximity probe is engineered for demanding rotating machinery applications, offering the ruggedness and accuracy that maintenance teams trust. Manufactured by Bently Nevada, this probe comes new in original factory packing and is backed by a 12-month warranty.

The 3300 XL series represents a significant advancement in eddy-current probe technology. With a patented TipLoc molding method, the bond between the probe tip and body is exceptionally robust, reducing the risk of mechanical failure. The CableLoc design provides 330 N (75 lbf) pull strength, securely attaching the probe cable to the tip. For applications where oil or liquid leakage is a concern, an optional FluidLoc cable option prevents fluids from migrating through the cable interior.

Technical Specifications

Key parameters of the 330191-00-08-90-05 include:

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

Total Length: 9.0 meters (29.5 feet)

Thread: 3/8-24 UNF, maximum engagement 0.563 in

Probe Tip Material: Polyphenylene sulfide (PPS)

Probe Case Material: AISI 303 or 304 stainless steel

Cable: 75Ω triaxial, FEP insulated (standard) or PFA (extended temperature range)

Power Requirement: -17.5 Vdc to -26 Vdc (nonincendive circuit), -23 Vdc to -26 Vdc with barriers

Output Resistance: 50 Ω

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

Probe DC Resistance: 9.87 ± 0.50 Ω (for 9.0 m length)

Connector Material: Gold-plated brass or beryllium copper

Maximum Connector Torque: 0.565 N•m (5 in•lbf)

Weight: 323 g/m (11.4 oz)

Agency Approvals: CSA, ATEX, IECEx

The probe operates with a supply voltage between -17.5 Vdc and -26 Vdc when installed with a nonincendive circuit per installation drawing 140979. At 12 mA maximum consumption, the voltage range shifts to -23 Vdc to -26 Vdc with barriers. Operating at a more positive voltage than -23.5 Vdc may reduce the linear range, so proper voltage selection is critical.

Industry Applications

The 330191-00-08-90-05 is ideal for vibration monitoring on turbines, compressors, pumps, and other rotating equipment. Its 8 mm probe size offers a thicker encapsulation of the probe coil in molded PPS plastic, providing superior ruggedness against physical abuse. This makes it a preferred choice in harsh industrial environments where probe damage is a concern.

For applications requiring extended temperature ranges, the PFA-insulated cable option allows operation from -55°C to +232°C (T1 classification). The probe's stainless steel case and gold-plated connectors ensure long-term reliability in corrosive or high-moisture settings.

Installation & Setup Guidance

Proper installation is essential for accurate vibration measurement. Follow these guidelines:

Mount the probe with the 3/8-24 UNF thread, ensuring the thread engagement does not exceed 0.563 in.

Use the specified torque of 0.565 N•m (5 in•lbf) on connectors to avoid damage.

Verify the total cable length (9.0 meters) matches your system requirements; one-meter systems do not use an extension cable.

Connect the probe to a Bently Nevada proximitor using the appropriate extension cable (not included).

Ensure the supply voltage is within the specified range to maintain linear output.

For nonincendive installations, follow the installation drawing 140979 to maintain safety approvals.

Maintenance & Reliability

The 3300 XL probe is designed for minimal maintenance. The patented TipLoc and CableLoc designs reduce mechanical stress points, extending service life. The probe's sealing system, which includes a Viton® O-ring, prevents differential pressure issues between the probe tip and case. However, probes are not pressure tested prior to shipment, so inspect the seal during installation.

Regularly check the probe cable for signs of wear or damage, especially at connection points. The 330 N (75 lbf) pull strength of the cable attachment provides a high margin of safety, but avoid exceeding this limit during handling.

Selection Guide & Purchasing Advice

When ordering the 330191-00-08-90-05, confirm the following:

Total length: 9.0 meters (29.5 feet) – ensure this matches your machine's measurement span.

Thread type: 3/8-24 UNF – verify compatibility with your mounting hardware.

Agency approvals: CSA, ATEX, IECEx – suitable for hazardous areas.

Optional armor: This model does not include armor; consider armored versions if mechanical protection is needed.

BluePLC Industrial offers genuine Bently Nevada parts with factory warranty. Contact us to verify stock availability and lead times. For complete technical specifications, please contact BluePLC Industrial.