Bently Nevada 330906-02-12-50-02-00 NSv Probe

Bently Nevada 330906-02-12-50-02-00 3300 NSv Reverse Mount Probe

Product Introduction

The Bently Nevada 330906-02-12-50-02-00 belongs to the 3300 NSv series of reverse mount proximity probes. You can use this probe in process compressors and other rotating machinery. This model comes with 3/8-24 UNF threads and a total length of 5.0 meters (16.4 feet). Additionally, it features a miniature coaxial ClickLoc connector with standard cable. The agency approval option 00 means no hazardous area certifications are required for this version.

Improved Chemical Resistance and Design

This NSv probe provides increased chemical resistance compared to the older 3300 RAM probe. Therefore, it performs reliably in many process compressor environments where chemical exposure occurs. The side-view characteristics also surpass those of the 3000-series 190 probe when you set the gap at the same distance from the target.

All components in this transducer system use gold-plated brass ClickLoc connectors. These connectors lock firmly into place and resist loosening from machine vibration. The patented TipLoc molding method creates a durable bond between the probe tip and the probe body. This bond ensures long-term mechanical integrity under harsh conditions.

Electrical and Linear Range Specifications

Probe DC resistance measures 5.3 ± 0.7 ohms from the center conductor to the outer conductor.
This higher resistance value reflects the longer 5.0 meter cable length.
For field wiring, you can use 0.2 to 1.5 mm² (16 to 24 AWG) cable.
We recommend using three-conductor shielded triad cable for optimal signal quality.
The maximum cable length between the 3300 XL NSv Proximitor Sensor and the monitor reaches 305 meters (1,000 feet).

Linear range extends to 1.5 mm (60 mils).
This range begins at approximately 0.25 mm (10 mils) from the target.
The full linear operating zone runs from 0.25 to 1.75 mm (10 to 70 mils), corresponding to approximately -1 to -13 Vdc.
Recommended gap setting is 1.0 mm (40 mils).

Long Cable Length Advantage

The total length option 50 gives you 5.0 meters (16.4 feet) of integral cable. This extended length eliminates the need for a separate extension cable in many installations. Therefore, you can reach distant Proximitor Sensors without additional connectors or signal degradation. The standard cable type provides reliable performance in dry industrial environments.

Mechanical Specifications

Probe tip material uses Polyphenylene sulfide (PPS) for excellent chemical resistance.
Probe case material is AISI 304 stainless steel (SST).

For reverse mount probes like the 330906-02-12-50-02-00, the maximum rated torque is 22.6 N•m (200 in•lb).
However, the recommended torque is only 7.5 N•m (66 in•lb) to prevent thread or case damage.

System weight varies by configuration. The probe itself weighs approximately 14 to 150 grams (0.5 to 5.3 oz).
For this 5.0 meter version, the total weight is approximately 0.35 kg due to the longer cable.

Temperature and Pressure Limits

Operating temperature ranges from -52°C to +177°C (-62°F to +351°F).
Storage temperature matches the same range: -52°C to +177°C.

Important warning: Exposing the probe to temperatures below -34°C (-30°F) for a sustained period may cause premature failure of the pressure seal.

The Bently Nevada 330906-02-12-50-02-00 is designed to seal differential pressure between the probe tip and the case. The sealing material consists of a Viton O-ring for reliable pressure containment.

Agency Approval Option 00

This probe carries no hazardous area certifications. The option 00 designation means agency approval is not required for your application. Therefore, you should only use this version in non-hazardous, general purpose locations. For explosive atmospheres, select a probe with option 01 through 05 instead.

Installation Guidelines

First, clean the 3/8-24 UNF mounting threads and the mounting surface thoroughly.
Next, apply the recommended torque of 7.5 N•m (66 in•lb) only. Do not exceed 22.6 N•m.
Then, set the gap to 1.0 mm (40 mils) for optimal linear performance.
Use the ClickLoc connector to lock the cable securely. You will hear a click when it locks properly.
Finally, verify the DC resistance reading falls within 5.3 ± 0.7 ohms before commissioning.

Packaging List

• Bently Nevada 330906-02-12-50-02-00 3300 NSv reverse mount probe (1 unit)

• 3/8-24 UNF threaded probe case with PPS tip (pre-assembled)

• Miniature coaxial ClickLoc connector with standard 5.0 meter cable (attached)

• Viton O-ring for pressure sealing (installed)

Note: No calibration certificates or warranty documents are included in this package.

Shipping

We ship all orders using FedEx, UPS, or DHL. Delivery typically takes 3 to 7 business days depending on your destination.

Frequently Asked Questions (FAQ)

1. What is the difference between 330906 and 330907 series probes?
The 330906 series uses 3/8-24 UNF threads, while the 330907 series uses M10x1 metric threads. Choose based on your mounting hardware requirements.

2. Can I use the 330906-02-12-50-02-00 in hazardous areas?
No. The agency approval option 00 means this probe has no hazardous area certifications. For explosive atmospheres, select a probe with option 01, 02, 03, 04, or 05 instead.

3. Why does this 5.0 meter probe have higher DC resistance than the 1.0 meter version?
DC resistance increases with cable length. The 5.0 meter probe measures 5.3 ± 0.7 ohms, while a 1.0 meter probe measures 4.2 ± 0.5 ohms. This is normal and expected.

4. How does the TipLoc molding method improve probe reliability?
TipLoc creates a permanent, robust bond between the probe tip and the probe body. This prevents separation or movement under vibration and thermal cycling, significantly extending service life.

5. What happens if I exceed the recommended mounting torque of 7.5 N•m?
Excessive torque may strip the threads, crack the probe case, or damage the internal components. Always stay within the recommended 7.5 N•m (66 in•lb) to avoid permanent damage.