Product Overview of Bently Nevada 330105-02-12-30-12-00

The Bently Nevada 330105-02-12-30-12-00 is a 3300 XL 8 mm reverse mount probe. This eddy current probe measures shaft vibration and position in turbomachinery. The 330105-02-12-30-12-00 delivers reliable data for critical machine protection systems. It works well on steam turbines, gas turbines, compressors, and large pumps. The reverse mount design allows installation through the machine casing.

Key Technical Specifications

Probe Type: 3300 XL 8 mm reverse mount probe for shaft monitoring applications.

Total Length Option: 30 represents 3.0 meters (9.84 feet) from probe tip to connector.

Connector Option: 12 provides Miniature ClickLoc coaxial connector with FluidLoc cable.

Agency Approval Option: 00 for standard approvals. This probe includes intrinsic safety and non-incendive certifications.

Nominal Probe DC Resistance: 8.17 ± 0.50 Ω measured from center conductor to outer conductor at 3.0m length.

Probe Case Thread: 3/8-24 UNF thread with maximum engagement length of 0.563 inches.

Weight: 323 grams per meter (11.4 oz per meter). Total probe weight approximately 969 grams.

Standard Probe Temperature Range: -52°C to +177°C (-62°F to +350°F) for operating and storage.

Extended Temperature Range Option: Probe tip reaches -52°C to +218°C. Cable and connector reach -51°C to +260°C.

Low Temperature Warning: Exposure below -34°C (-30°F) may cause premature failure of the pressure seal.

Probe Pressure Sealing: Viton® O ring seals differential pressure between probe tip and case. Probes are not pressure tested before shipment.

Relative Humidity Performance: Less than 3% change in Average Scale Factor (ASF) at 93% humidity for up to 56 days per IEC 68-2-3.

Dimensions: Package dimensions are 20.4 cm x 22.2 cm x 3.7 cm.

Hazardous Area Approvals

The Bently Nevada 330105-02-12-30-12-00 carries multiple certifications for hazardous locations:

Intrinsic Safety (ia): Install with intrinsically safe zener barriers per drawing 141092 or with galvanic isolators. Approvals include Class I, Zone 0: AEx/Ex ia IIC T5…T1 Ga; Class I, Groups A, B, C, D; Class II, Groups E, F, G; Class III.

Non-Incendive (nA, ec): Install with non-incendive circuit per drawing 140979. Approvals include Class I, Zone 2: AEx/Ex nA IIC T5…T1 Gc; Class I, Division 2, Groups A, B, C, D; Class I, Zone 2: AEx/Ex ec IIC T5…T1 Gc.

Temperature Classification Schedule

For EPL Ga and Gc (Probe only):

• 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 (Dust environments):

• T280°C at -55°C to +232°C
• T225°C at -55°C to +177°C
• T170°C at -55°C to +120°C
• T130°C at -55°C to +80°C
• T105°C at -55°C to +100°C
• T90°C at -55°C to +40°C

Installation Guidelines

Mount the 330105-02-12-30-12-00 through a threaded hole in the machine casing. Use the 3/8-24 UNF thread for installation. Ensure thread engagement does not exceed 0.563 inches. Clean the mounting hole thoroughly before insertion. Apply anti-seize compound to the threads for high temperature applications. Tighten the probe to the recommended torque specification. Route the 3.0 meter cable away from high heat sources and moving parts. Connect the Miniature ClickLoc connector to the extension cable. Do not expose the probe to temperatures below -34°C. Verify the probe gap voltage before machine startup.

Package Contents (No certificates, No warranty clauses, No courier info)

• 1 x Bently Nevada 330105-02-12-30-12-00 reverse mount probe
• 1 x 3.0 meter coaxial cable with Miniature ClickLoc connector
• 1 x Viton® O ring pressure seal (pre-installed)
• 1 x protective cap for connector during storage
• 1 x installation instruction sheet

Frequently Asked Questions (FAQ)

1. What is a reverse mount probe and when should I use it?

A reverse mount probe like the Bently Nevada 330105-02-12-30-12-00 installs from outside the machine casing. This design allows probe replacement without opening the machine.

2. What is the FluidLoc cable option and do I need it?

The FluidLoc cable on the 330105-02-12-30-12-00 provides extra fluid sealing. Most 3300 XL 8mm reverse mount installations do not need this option due to the existing probe sleeve.

3. Can this probe operate at very low temperatures?

While the Bently Nevada 330105-02-12-30-12-00 has a -52°C rating, exposure below -34°C may damage the pressure seal. Consider special seals for extreme cold applications.

4. What hazardous area approvals does this probe carry?

This 330105-02-12-30-12-00 includes ia (intrinsic safety) and nA/ec (non-incendive) approvals for Zone 0, Zone 2, and Division 1/2 locations.

5. What is the typical scale factor for this 8 mm probe?

The 3300 XL 8 mm probe family has a standard scale factor of 7.87 mV/µm (200 mV/mil). This Bently Nevada 330105-02-12-30-12-00 follows the same specification.

Application Scenarios

The Bently Nevada 330105-02-12-30-12-00 excels in critical turbomachinery monitoring. Steam turbine operators use these probes for radial shaft vibration measurement. Gas turbine facilities monitor thrust position with reverse mount probes. Compressor trains rely on this sensor for journal bearing monitoring. The 8 mm tip diameter provides excellent linear range for most shaft sizes. The reverse mount design simplifies installation on machines with limited internal access. Hydrocarbon processing plants use this probe in Zone 0 hazardous areas. Power generation facilities benefit from the wide temperature range.

Reverse Mount Design Advantages

The reverse mount configuration of the 330105-02-12-30-12-00 offers distinct benefits. You install the probe from outside the machine casing. This design eliminates the need for internal access during replacement. Maintenance teams can change probes without opening the machine. The probe threads directly into a tapped hole in the casing. The Viton® O ring seals process pressure effectively. This mounting style reduces installation time significantly. The 3.0 meter cable reaches the junction box without extension cables.

Connector and Cable Features

The Miniature ClickLoc connector on the Bently Nevada 330105-02-12-30-12-00 provides secure attachment. This connector clicks audibly when fully mated. The FluidLoc cable option adds an extra layer of fluid sealing. The coaxial cable design maintains signal integrity over the 3.0 meter length. The cable jacket resists oil and chemical exposure. The connector body withstands the extended temperature range. Field replacement of the connector is not recommended.

Environmental Robustness & Compliance

This 330105-02-12-30-12-00 probe withstands harsh industrial environments. The probe tip operates up to +177°C standard or +218°C extended. The Viton® O ring seals differential pressure effectively. Humidity testing shows less than 3% scale factor change at 93% relative humidity. The probe meets IEC 68-2-3 standards for damp heat testing. The anodized probe case resists corrosion. The hazardous area approvals cover Zone 0, Zone 2, and Division locations. The temperature classification schedule provides clear installation guidance.

Compatibility Information

The Bently Nevada 330105-02-12-30-12-00 works with 3300 XL extension cables and proximitors. Use it with 3300 XL 8 mm extension cables (330130 series). The probe connects to 3300 XL proximitors (330180 series) for signal conditioning. The system provides 200 mV/mil (7.87 mV/µm) scale factor. The reverse mount design fits standard 3/8-24 UNF mounting holes. The 3.0 meter length suits most machine train installations. For longer runs, add extension cables up to 9.0 meters total system length.

Important Note About FluidLoc Cable Option

The FluidLoc cable option on the 330105-02-12-30-12-00 requires careful consideration. Bently Nevada notes this option is not necessary for most 330105 installations. The reverse mount probe sleeve already provides fluid sealing. Only order FluidLoc for applications with extreme fluid ingress risk. Consider your specific operating environment before selecting this option.

Conclusion

The Bently Nevada 330105-02-12-30-12-00 delivers reliable shaft vibration and position measurement. Its reverse mount design simplifies installation and replacement. The 3.0 meter cable and ClickLoc connector provide secure signal transmission. The hazardous area approvals allow use in demanding petrochemical applications. For critical turbomachinery monitoring, this 3300 XL 8 mm reverse mount probe offers proven performance.

Note: This product is new and original in factory packing, made in U.S.A. For bulk pricing or expedited availability, please contact our sales team.