Bently Nevada 330104-03-09-50-02-00 3300 XL 8 mm Proximity Probe

Product Overview

The 330104-03-09-50-02-00 is a high-performance proximity probe from the Bently Nevada 3300 XL series, designed for non-contacting displacement measurements in critical rotating machinery. This specific model features an M10 x 1 metric thread and is equipped with stainless steel armor for enhanced durability.

With a 5.0-meter total length, this probe is typically used in "5-meter systems" where the probe connects directly to a Proximitor® sensor without the need for an intermediate extension cable. It is widely utilized for monitoring radial vibration, axial thrust, and speed on high-speed assets such as steam turbines, centrifugal compressors, and industrial pumps.

Technical Configuration

The part number options define the specific mechanical dimensions and connectivity for this metric probe:

• M10 x 1 Thread: Standard metric mounting interface.

• Unthreaded Length (03): 30 mm. This allows the probe tip to extend through the mounting boss or housing to reach the target shaft.

• Overall Case Length (09): 90 mm. The total length of the threaded probe body.

• Total Length (50): 5.0 metres (16.4 feet). An integrated "long-lead" cable that allows for direct connection to the Proximitor in many configurations.

• Connector (02): Features the ClickLoc™ miniature coaxial connector. This option provides a secure, vibration-resistant connection point without the additional clear connector protector sleeve.

• Armor Protection: The coaxial cable is protected by a flexible stainless steel conduit, preventing mechanical damage from sharp edges and debris within the machine environment.

Technical Specifications

Technical FAQs

Can I use this 5.0m probe with an extension cable?

Generally, no. This probe is designed for a 5-meter system. If you add an extension cable to a 5.0m probe, the total capacitance will exceed the requirements of standard 5m or 9m Proximitors, leading to inaccurate vibration readings or a total loss of signal.

What is the benefit of the 30 mm unthreaded length?

The unthreaded length (Option 03) is used when the probe is installed in a deep threaded hole or a probe housing. It ensures that the sensitive tip is positioned correctly near the shaft without the threads interfering with the internal mounting hardware or the machine's internal clearance.

Does the armor affect the electrical signal?

No. The stainless steel armor is a purely mechanical protective layer. The electrical signal is carried by the internal 75 $\Omega$ coaxial cable. However, the armor should be grounded only at the Proximitor end to avoid ground loops.

Engineering & Installation Guide

• Mechanical Positioning: When installing the M10 threads, ensure the probe tip is perpendicular to the shaft. Use a gap-to-voltage conversion (typically -9.0 VDC for the center of the linear range) to set the physical distance between the tip and the shaft.

• Armor Handling: While the armor is flexible, do not exceed the minimum bend radius (typically 25.4 mm). Kinking the armor can crush the internal coaxial cable, causing signal "noise" or a failure of the sensor.

• Environmental Sealing: If the probe is installed in an oil-filled machine, ensure the mounting threads are sealed with an oil-compatible thread sealant to prevent leakage.

• System Check: Before commissioning, verify the "Low-Low" and "High-High" voltage limits in your monitoring rack (e.g., Bently Nevada 3500) to ensure the probe is gapped within the linear region.