Bently Nevada 330906-02-12-70-02-00 NSv Reverse Mount Probe

Product Introduction

The Bently Nevada 330906-02-12-70-02-00 represents a significant advancement in proximity probe technology. Specifically, this reverse mount configuration is engineered for challenging turbomachinery environments where space is limited. Meanwhile, the probe delivers exceptional measurement accuracy and long-term reliability. Moreover, its robust construction ensures consistent performance even under extreme temperature and pressure conditions. In fact, this model incorporates the latest material science advancements to resist chemical attack. Therefore, it is ideally suited for process compressor applications where other probes may fail prematurely. Additionally, the extended 7.0-meter cable provides greater installation flexibility without compromising signal quality.

Technical Specifications

Electrical Characteristics

The 330906-02-12-70-02-00 operates with carefully defined electrical parameters for precise measurement. For instance, the probe's DC resistance is a critical specification that directly impacts signal integrity. Accordingly, for this 7.0-meter version, the resistance between the center and outer conductors is 5.9 ± 0.9 ohms. Furthermore, the field wiring must utilize a three-conductor shielded triad cable to minimize electromagnetic interference. This wiring can extend to a maximum length of 305 meters (1,000 feet) between the Proximitor Sensor and the monitor. However, it is important to note that using longer cable runs may cause signal rolloff at high frequencies. Therefore, users should always consult the frequency response graphs before finalizing their installation design.

Linear Range and Gap

This model provides a reliable linear range of 1.5 mm (60 mils) for accurate displacement measurement. To begin with, the linear range starts at approximately 0.25 mm (10 mils) from the target surface. Then, it extends continuously from 0.25 to 1.75 mm (10 to 70 mils). In practice, this measurement range corresponds to an output voltage of approximately -1 to -13 Vdc. Additionally, the recommended gap setting for optimal system performance is 1.0 mm (40 mils). Consequently, this placement ensures the target remains in the most linear portion of the probe's operating range. As a result, the sensor delivers highly accurate and repeatable measurement data for predictive maintenance applications.

Connector and Cable Options

This specific unit comes with a 02 connector option. Specifically, this indicates a miniature coaxial ClickLoc connector with a standard cable assembly. Moreover, all ClickLoc connectors feature gold-plated brass contacts for superior conductivity and corrosion resistance. Furthermore, these connectors lock securely into place once fully engaged. Therefore, they effectively prevent any loosening caused by vibration, thermal cycling, or mechanical shock. Meanwhile, the total length option 70 denotes a 7.0-meter (23.0 feet) cable. This extended length provides ample flexibility for installation in large machinery trains while still maintaining excellent signal integrity.

Agency Approval

The 00 agency approval option indicates that this particular model does not require specific regulatory certifications. For many industrial applications, this simplifies procurement and reduces lead time. However, users should always verify their local regulatory requirements before installation.

Mechanical & Environmental Parameters

Material and Construction

The probe is manufactured using premium materials selected for maximum durability. For example, the probe tip is made from Polyphenylene sulfide (PPS), a high-performance engineering thermoplastic. Meanwhile, the probe case is constructed from AISI 304 stainless steel (SST). Consequently, this material combination offers outstanding resistance to corrosion, wear, and chemical attack. Additionally, the reverse mount design utilizes a 3/8-24 UNF thread for secure and repeatable attachment. Furthermore, the patented TipLoc molding method creates an exceptionally robust bond between the probe tip and its body. As a result, this prevents internal separation and ensures a long operational service life even in demanding environments.

Temperature and Pressure Ratings

Environmental resilience is a defining characteristic of the Bently Nevada 330906-02-12-70-02-00. For instance, its operating temperature range extends from -52°C to +177°C (-62°F to +351°F). Similarly, the storage temperature range matches the operating range exactly. However, prolonged exposure below -34°C (-30°F) may cause premature failure of the pressure seal. Therefore, users should avoid sustained low-temperature operation whenever possible. In addition, the probe is specifically designed to seal differential pressure between the tip and the case. Specifically, it utilizes a Viton O-ring for this sealing function, which provides excellent chemical compatibility and temperature resistance.

Torque Specifications and Weight

Proper installation torque is essential for reliable performance in the reverse mount configuration. On one hand, the maximum rated torque for these probes is 33.9 N•m (300 in•lb). On the other hand, the recommended installation torque is significantly lower at 11.3 N•m (100 in•lb). Therefore, applying the recommended torque prevents thread damage and ensures proper sealing without over-stressing the probe body. Moreover, the system weight varies depending on the specific cable length. For this 7.0-meter version, the probe itself weighs approximately 14 to 150 g (0.5 to 5.3 oz). Finally, the maximum recommended length of thread engagement for the M10x1 thread is 15 mm.

Installation Guidelines

Pre-Installation Checks

Before installing the 330906-02-12-70-02-00, several preliminary steps are essential for success. First, inspect the probe and cable carefully for any signs of physical damage or deformation. Next, verify that the model number and specifications match your system requirements precisely. Meanwhile, ensure the target surface is clean, smooth, and free of any debris or imperfections. Finally, confirm that the field wiring length does not exceed the maximum of 305 meters to avoid signal degradation.

Mounting Procedure

First, thread the probe into the mounting hole by hand to ensure proper alignment with the threads. Next, use a calibrated torque wrench to tighten it to the recommended 11.3 N•m (100 in•lb). This prevents overtightening and potential damage to the threads or probe body. Then, connect the probe to the extension cable using the ClickLoc connector. Meanwhile, ensure that a secure lock is achieved by listening for the audible click that confirms full engagement. Finally, route the cable carefully to avoid sharp bends, kinks, or excessive strain that could damage the internal conductors.

Gapping and Setup

After mounting, proceed with the electrical setup and gapping procedure systematically. First, connect the system to the power supply and monitoring equipment according to the manufacturer's specifications. Next, use a precision micrometer or the system's voltage reading to set the initial gap. Then, adjust the probe incrementally until the output voltage corresponds to the recommended 1.0 mm (40 mils) gap. Consequently, this step is essential for achieving accurate vibration and position monitoring data. Therefore, take care to perform this adjustment slowly and methodically for best results.

Packaging List

This product is shipped with the following items:

• 1 x Bently Nevada 330906-02-12-70-02-00 NSv Reverse Mount Probe

• 1 x Installation Guide

Note: Additional mounting hardware, extension cables, and Proximitor Sensors may be required for a complete system and are sold separately.

Shipping Method: Orders are shipped via Fedex, UPS, or DHL.

FAQ

Q1: What is the primary advantage of this NSv probe over the older 3300 RAM model?
A1: The primary advantage is its increased chemical resistance compared to the 3300 RAM probe. As a result, it offers reliable operation in many process compressor applications where chemical exposure is a concern.

Q2: What is the significance of the "70" in the model number 330906-02-12-70-02-00?
A2: The "70" in the model number designates the total length option. Specifically, it indicates that this unit comes with a 7.0-meter (23.0 feet) cable, which provides greater installation flexibility for large machinery.

Q3: What is the recommended gap setting for this reverse mount probe?
A3: The recommended gap setting for the 330906-02-12-70-02-00 is 1.0 mm (40 mils). Consequently, this places the target within the center of the probe's linear range (0.25 to 1.75 mm) for optimal measurement accuracy.

Q4: What is the maximum length of the field wiring between this probe and the monitor?
A4: The maximum recommended length of field wiring between the 3300 XL NSv Proximitor Sensor and the monitor is 305 meters (1,000 feet). However, be aware that longer lengths may cause signal rolloff at high frequencies.

Q5: What is the recommended torque for installing this probe?
A5: The maximum rated torque is 33.9 N•m (300 in•lb). However, the recommended installation torque is only 11.3 N•m (100 in•lb). Therefore, applying the lower recommended torque will prevent thread damage and ensure proper sealing.