Product Overview

The Bently Nevada 330800-28-00-085-02-02 PROXPAC XL Proximity Transducer Assembly represents a sophisticated, self-contained sensing solution designed for the rigorous monitoring of axial position and radial vibration. By integrating a 3300 XL proximity probe and a Proximitor Sensor into a single, ruggedized housing, this assembly eliminates the need for separate extension cables and external mounting for the sensor electronics. This specialized architecture excels in high-speed rotating machinery applications where space is at a premium or where simplified installation is required to reduce failure points. It delivers a high-precision, non-contact displacement signal directly to Bently Nevada 3500 racks or third-party DCS interfaces, ensuring that critical assets—such as cooling tower fans, pumps, and motors—operate within safe mechanical tolerances.

Suffix Configuration Logic

Assembly Hardware Interpretation

The model 330800-28-00-085-02-02 utilizes a detailed suffix structure to define its mechanical envelope and electrical safety parameters.

Probe Penetration (28): Specifies a 2.8-inch penetration depth, defining how far the probe extends from the assembly base into the machine housing to reach the target shaft.

Fittings Option (00): Indicates no fitting or standard NPT conduit fittings, providing a clean interface for standard industrial wiring environments.

Mounting Thread (085): Defines the specific mounting thread size (e.g., 0.85 inches or specialized metric equivalent) ensuring a secure, pressure-sealed fit to the machine casing.

Agency Approval (02): Designates ATEX/IECEx intrinsically safe (IS) and non-incendive (NI) certifications, allowing for safe deployment in potentially explosive industrial atmospheres.

Standoff Adapter (02): Represents a specific length for the standoff adapter, providing the necessary clearance for external wiring and cooling while maintaining probe alignment.

Technical Parameters & Dimensions

Field Commissioning Standards

Mechanical Positioning and Electrical Zeroing

Successful integration of the PROXPAC XL requires careful attention to the mechanical gap between the probe tip and the target shaft. During installation, use a calibrated voltmeter to monitor the DC output. Technicians must adjust the assembly until the output reaches -10.0 VDC, which signifies the center of the 80-mil linear measurement range. Ensure the mounting threads are lubricated with an anti-seize compound appropriate for your specific industrial environment to prevent galling. The internal Proximitor is factory-tuned to the internal probe length; therefore, never attempt to shorten the internal leads. Verify that the housing is properly grounded to the machine case to eliminate electrical noise interference in the displacement signal.

Industrial Reliability and System Synergy

The 330800-28-00-085-02-02 thrives in outdoor or wash-down environments where separate sensor housings would be prone to moisture ingress. Its integrated design significantly reduces the "Total Cost of Ownership" by eliminating the need for extension cables and protective conduit for those cables. The PROXPAC XL provides a seamless interface with Honeywell Experion PKS or other safety-instrumented systems (SIS). This assembly captures high-frequency vibration data with exceptional stability, allowing the system to trigger alarm or shutdown sequences with millisecond accuracy. Its robust housing provides a secondary layer of protection against mechanical impact and environmental contaminants, ensuring long-term signal integrity in the most demanding cooling tower or compressor applications.

Delivery & Logistics Profile

Delivery time: 3-5 days when payment finish, BY DHL/FEDEX/UPS.

We supply the 330800 assembly in original factory-sealed, anti-static industrial packaging. This multi-layered protection prevents internal component damage and shields the integrated electronics from electrostatic discharge during international transit, ensuring your transducer is field-ready upon arrival.

Technical Support FAQ

Q1: What are the main benefits of PROXPAC XL over a standard probe/extension cable setup?

A1: PROXPAC XL integrates the Proximitor directly into the mounting assembly. This eliminates extension cables—the most common failure point in vibration systems—and simplifies the installation footprint on the machine.

Q2: Is the internal probe replaceable if it gets damaged?

A2: Yes, the 3300 XL 8mm probe inside the assembly is replaceable, but it must be replaced with the exact same length and model to maintain the factory calibration of the integrated Proximitor.

Q3: Can this assembly be used with a 3500/42M Proximitor/Seismic Monitor?

A3: Absolutely. The PROXPAC XL output is electrically identical to a standard 3300 XL Proximitor sensor output and is fully compatible with Bently Nevada 3500 series monitors.

Q4: How do I handle hazardous area wiring for this device?

A4: Since this model includes the "02" agency approval, it must be installed with an appropriate intrinsic safety barrier or in accordance with non-incendive wiring practices as specified in the Bently Nevada installation manual.