330141-08-10-12-00 | Bently Nevada 3300 XL 8 mm Probe, 1.0 m

Introduction: The Evolution of Machinery Protection

Industrial machinery protection has evolved from simple vibration switches to high-precision eddy current systems. As turbines, compressors, and pumps became more complex, the need for exact displacement measurement grew. The Bently Nevada 3300 XL series emerged from this demand, delivering engineering-grade precision for critical rotating equipment. The 330141-08-10-12-00 is a specific configuration within this series: an 8 mm probe with armor, a 1.0 meter total length, and a FluidLoc cable option. This probe reflects decades of refinement in non-contact measurement technology.

330141-08-10-12-00 Key Features and Technical Specifications

The 330141-08-10-12-00 integrates several patented design elements that enhance reliability and measurement accuracy. Its construction addresses common failure points in industrial environments.

• Probe Type: 3300 XL 8 mm probe with armor for physical protection.
• Total Length: 1.0 meter (3.3 feet) from probe tip to connector.
• Connector: Miniature coaxial ClickLoc connector with FluidLoc cable.
• Probe Tip Material: Polyphenylene sulfide (PPS) for chemical resistance.
• Probe Case Material: AISI 303 or 304 stainless steel.
• Probe Weight: 323 g/m (11.4 oz).
• Operating Temperature: -52°C to +177°C (-62°F to +350°F) for standard probe.
• Nominal DC Resistance: 7.59 ± 0.50 Ω at 1.0 meter.
• Incremental Scale Factor: 7.87 V/mm (200 mV/mil) ±5% for 1 meter system.
• Deviation from Best Fit Line: Less than ±0.025 mm (±1 mil).
• Pressure Seal: Viton O-ring seals differential pressure between tip and case.
• Humidity: Less than 3% change in Average Scale Factor at 93% humidity for 56 days.

Notably, the FluidLoc cable option prevents oil and other liquids from leaking through the cable interior, a common failure mode in oil-lubricated machines. The patented TipLoc molding method creates a robust bond between tip and body, while the CableLoc design provides 330 N (75 lbf) pull strength.

Applications and Use Cases for the 330141-08-10-12-00

This probe is engineered for continuous monitoring of radial and axial displacement in rotating machinery. Consequently, it is widely used in steam turbines, gas turbines, and centrifugal compressors. In a typical power plant, the 330141-08-10-12-00 might monitor shaft vibration on a turbine generator, providing early warning of imbalance or misalignment. Furthermore, its FluidLoc cable makes it suitable for machines where oil leakage could contaminate the probe or surrounding area. The 8 mm probe diameter offers a more rugged case than smaller probes, making it preferable in physically demanding installations. For optimal robustness against physical abuse, Bently Nevada recommends 8 mm probes whenever possible.

Installation and Setup

Proper installation is critical for accurate displacement measurement. The probe must be mounted perpendicular to the target surface, with the correct gap voltage established per the associated driver and extension cable. The ClickLoc connector ensures a secure, repeatable connection. Because the probe is armored, it resists mechanical damage during routing. Always follow the machinery protection system manual for specific gap settings and calibration. The 1.0 meter length is suited for short-run applications where the probe connects directly to an extension cable or driver.

Maintenance and Reliability

The 330141-08-10-12-00 requires minimal maintenance, but periodic inspection is recommended. Check the probe tip for wear or deposits, and verify cable integrity. The Viton O-ring seal should be inspected for degradation, especially in high-temperature or chemically aggressive environments. Exposing the probe to temperatures below -34°C (-30°F) may cause premature failure of the pressure seal. Therefore, ensure operating conditions remain within the specified range. With proper care, the probe delivers long-term, engineering-grade precision.

Product Support and Availability

The 330141-08-10-12-00 is in stock and ready to ship from AutoDCSTech. For precise matching to your machinery protection system, contact AutoDCSTech with your exact requirements.