Bently Nevada 330908-00-31-05-02-00 | 3300 NSv Proximity Probe

330908-00-31-05-02-00 Product Introduction

The Bently Nevada 330908-00-31-05-02-00 belongs to the 3300 NSv proximity probe family. NSv probes represent a distinct series within Bently Nevada's product line, offering specific performance characteristics for vibration monitoring applications. This non-contact eddy-current probe accurately measures static position and dynamic vibration of conductive targets.

This 3300 NSv proximity probe shares the robust design philosophy of the 3300 XL series but comes in a more compact form factor. The probe uses a 75 Ω coaxial cable with FEP insulation, available in standard lengths of 0.5, 1, 5, or 7 meters. The 8 mm diameter provides reliable performance while maintaining compatibility with standard probe holders and mounting hardware.

Key Technical Specifications

The 330908-00-31-05-02-00 uses a 3/8-24 UNF thread with a maximum engagement length of 0.563 inches. The unthreaded length option 00 indicates no unthreaded portion, while overall case length option 31 provides 3.1 inches of case length. Total length option 05 delivers a 0.5-meter (20-inch) cable.

For this 0.5-meter configuration, the nominal DC resistance from center to outer conductor measures 4.0 ± 0.5 Ω. This lower resistance compared to 3300 XL probes reflects different internal design characteristics optimized for the NSv series performance profile.

The connector option 02 provides a Miniature coaxial ClickLoc connector with standard cable. Agency approval option 00 indicates no specific certifications are required for this model, making it suitable for non-hazardous area installations.

Mechanical Specifications

The Bently Nevada 330908-00-31-05-02-00 features a probe case made from AISI 304 stainless steel (SST). This material offers excellent corrosion resistance and durability in industrial environments. The probe tip uses Polyphenylene sulfide (PPS), a high-performance engineering plastic that provides robust encapsulation for the sensing coil.

The probe case torque specification follows standard values: maximum rated torque is 33.9 N•m (300 in•lb), with a recommended torque of 11.3 N•m (100 in•lb). These values apply to both 3/8-24 and M10x1 probe cases. Always use a torque wrench during installation to prevent overtightening and potential case damage.

Weight ranges from approximately 14 to 150 grams (0.5 to 5.3 oz), depending on the cable length. For the 0.5-meter configuration, the probe weighs approximately 25-30 grams.

Cable Specifications

The 3300 NSv proximity probe uses high-quality 75 Ω coaxial cable with fluoroethylene propylene (FEP) insulation. FEP provides excellent dielectric properties and thermal stability, maintaining signal integrity across the operating temperature range.

Available total probe lengths include:

• 0.5 meter (20 inches)

• 1.0 meter (3.3 feet)

• 5.0 meters (16.4 feet)

• 7.0 meters (23.0 feet)

The Miniature ClickLoc connector provides a secure, positive-locking connection that prevents accidental disconnection due to vibration. This connector design ensures reliable signal transmission between the probe and extension cable or directly to the Proximitor Sensor.

Environmental Ratings

The 330908-00-31-05-02-00 operates across a temperature range of -52°C to +177°C (-62°F to +351°F) for both operating and storage conditions. This wide temperature tolerance makes the probe suitable for most industrial environments, including turbine and compressor installations.

Important temperature considerations:

• Exposing the probe to temperatures below -34°C (-30°F) for sustained periods may cause premature failure of the pressure seal

• The Viton® O-ring maintains differential pressure sealing between the probe tip and case

• The probe is not pressure-tested prior to shipment

The probe uses a Viton® O-ring to seal differential pressure between the probe tip and case. While Bently Nevada does not pressure-test probes before shipment, you can arrange custom testing through their design department for application-specific requirements.

Installation Guidelines

Installing the 330908-00-31-05-02-00 follows standard proximity probe procedures. Begin by confirming the thread engagement: the maximum length is 0.563 inches. Apply the recommended torque of 11.3 N•m (100 in•lb) for secure mounting without damaging the case.

The 0.5-meter cable provides a short lead for installations where the Proximitor Sensor is located close to the probe. For longer distances, use extension cables designed for the 3300 NSv series. The ClickLoc connector ensures reliable connections between probe and extension cables.

When routing the cable, avoid sharp bends and excessive strain. While the probe cable is flexible, maintaining a minimum bend radius of approximately 50 mm (2 inches) prevents damage to the internal conductors and insulation.

Packaging List

Your shipment of the Bently Nevada 330908-00-31-05-02-00 includes the following items:

• 330908-00-31-05-02-00 3300 NSv Proximity Probe (1 unit)

• Protective shipping cap for the probe tip

• Installation instruction sheet (quick-start guide)

• Anti-static packaging bag for safe transport

Note: The package does not include calibration certificates, quality warranty documents, or mounting hardware. These items must be ordered separately if required.

Shipping Information

All orders ship via FedEx, UPS, or DHL with full tracking and insurance coverage. Standard delivery times range from 3 to 7 business days depending on your location. Expedited shipping options are available upon request for urgent deliveries.

Frequently Asked Questions (FAQ)

1. What is the difference between 3300 NSv and 3300 XL probes?
The 330908-00-31-05-02-00 belongs to the NSv series, which offers different electrical characteristics than the XL series. The NSv probe has a lower DC resistance (4.0 Ω vs. 7.45 Ω for the XL) and uses 75 Ω coaxial cable versus the XL's triaxial cable design.

2. Can I use this probe with 3300 XL extension cables?
No, the 3300 NSv probe uses different cable specifications than the 3300 XL series. Always use extension cables specifically designed for the NSv series to ensure proper impedance matching and signal integrity.

3. Why is this probe not pressure-tested before shipment?
Bently Nevada does not pressure-test standard probes as part of routine manufacturing. However, the Viton® O-ring provides differential pressure sealing. If your application requires pressure testing, contact Bently Nevada's custom design department to arrange this service.

4. What agency approvals does this probe have?
The 330908-00-31-05-02-00 with agency option 00 has no specific hazardous area certifications. It is designed for non-hazardous area installations. For hazardous area applications, select agency approval options that include CSA, ATEX, or IECEx certifications.

5. What is the maximum cable length for the 3300 NSv system?
The 3300 NSv system supports total probe lengths of 0.5, 1, 5, or 7 meters. For longer runs, extension cables can extend the total system length. Consult Bently Nevada documentation for maximum system length limits to maintain specified performance.