Product Overview of Bently Nevada 330105-02-12-90-02-CN

The Bently Nevada 330105-02-12-90-02-CN is a 3300 XL 8 mm reverse mount probe. This eddy current probe measures shaft vibration and position in turbomachinery. The 330105-02-12-90-02-CN delivers reliable data for critical machine protection systems. It works well on large steam turbines, gas turbines, compressors, and pumps. The reverse mount design allows installation through the machine casing. The 9.0 meter length reaches distant junction boxes in large power plants. The CN agency approval option meets specific regional requirements.

Key Technical Specifications

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

Total Length Option: 90 represents 9.0 meters (29.5 feet) from probe tip to connector.

Connector Option: 02 provides Miniature ClickLoc coaxial connector without FluidLoc cable.

Agency Approval Option: CN for country specific approval. This probe includes intrinsic safety and non-incendive certifications with regional compliance.

Nominal Probe DC Resistance: 9.87 ± 0.50 Ω measured from center conductor to outer conductor at 9.0m 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 2,907 grams (6.41 lbs).

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 330105-02-12-90-02-CN carries multiple certifications for hazardous locations with country specific approval CN:

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 330105-02-12-90-02-CN 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 9.0 meter cable away from high heat sources and moving parts. Secure the long cable every 30 cm to prevent vibration damage. 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 330105-02-12-90-02-CN reverse mount probe
• 1 x 9.0 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 the DC resistance for the 9.0 meter version?

The Bently Nevada 330105-02-12-90-02-CN has nominal DC resistance of 9.87 Ω, which is higher than shorter versions due to the longer cable length.

2. Can I use this 9.0 meter probe with extension cables?

No, the 330105-02-12-90-02-CN already reaches the maximum total system length of 9.0 meters. You cannot add extension cables to this probe.

3. What does the CN agency approval option mean for this probe?

The CN option on Bently Nevada 330105-02-12-90-02-CN indicates country specific approval. This meets regional certification requirements for certain markets.

4. Can this probe operate at very low temperatures?

While the Bently Nevada 330105-02-12-90-02-CN has a -52°C rating, exposure below -34°C may damage the pressure seal. Consider special seals for extreme cold applications.

5. What hazardous area approvals does this probe carry?

This 330105-02-12-90-02-CN includes ia (intrinsic safety) and nA/ec (non-incendive) approvals for Zone 0, Zone 2, and Division 1/2 locations plus country specific CN certification.

Application Scenarios

The Bently Nevada 330105-02-12-90-02-CN excels in very large turbomachinery installations with remote monitoring rooms. Large power plants use these probes on mega-watt steam turbines where junction boxes sit far from the casing. LNG facilities monitor compressor trains with probes running to central equipment rooms. 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. The 9.0 meter length reaches monitors without any extension cables. This probe suits applications where adding extension cable connectors is not desirable.

Reverse Mount Design Advantages

The reverse mount configuration of the 330105-02-12-90-02-CN 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 9.0 meter cable reaches very distant monitoring points without additional connections.

Maximum System Length Considerations

The 9.0 meter length of the 330105-02-12-90-02-CN represents the maximum total system length for 3300 XL probes. You cannot add any extension cable to this probe. The total system length must remain at or below 9.0 meters for proper performance. Exceeding this length will affect the scale factor and linear range. This probe provides the longest single-cable solution available. For applications requiring more than 9.0 meters, you must relocate the proximitor or use a different monitoring system.

Connector and Cable Features

The Miniature ClickLoc connector on the Bently Nevada 330105-02-12-90-02-CN provides secure attachment. This connector clicks audibly when fully mated. The standard cable option (without FluidLoc) suits most industrial environments. The coaxial cable design maintains signal integrity over the full 9.0 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. The long cable requires careful routing to avoid sharp bends.

Environmental Robustness & Compliance

This 330105-02-12-90-02-CN 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 CN agency approval ensures compliance with specific regional regulations.

Compatibility Information

The Bently Nevada 330105-02-12-90-02-CN works directly with 3300 XL proximitors (330180 series). You cannot use extension cables with this 9.0 meter probe. The probe connects directly to the proximitor 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. This length suits very large machine trains where monitors sit in remote control rooms. The 9.0 meter length eliminates the need for field splicing or extension connectors.

Country Specific Approval CN Information

The CN approval option on the 330105-02-12-90-02-CN meets specific regional certification requirements. This approval ensures compliance with local regulations for hazardous area installations. The probe maintains all standard 3300 XL performance characteristics. The CN certification adds no functional differences to probe operation. It provides documentation traceability for regulated industries. Contact our sales team for specific CN approval certificate details.

Cable Length Selection Guide for Long Runs

Choose the 330105-02-12-90-02-CN when your monitoring equipment sits 8 to 9 meters from the probe mounting point. This length eliminates the need for extension cables and their associated connectors. This option suits large power plant turbines and long compressor trains. For distances under 8 meters, consider the 5.0 meter or 3.0 meter versions with or without extension cables. The 9.0 meter version is the maximum single-cable length available. Do not attempt to extend this probe further.

Conclusion

The Bently Nevada 330105-02-12-90-02-CN delivers reliable shaft vibration and position measurement at the maximum 9.0 meter reach. Its reverse mount design simplifies installation and replacement. The standard ClickLoc connector provides secure signal transmission. The CN agency approval meets regional certification requirements. For critical turbomachinery monitoring requiring the longest single-cable solution in regulated markets, 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.