Bently Nevada 330880-28-40-058-01-02 PROXPAC XL Proximity Assembly

Product Overview

The Bently Nevada 330880-28-40-058-01-02 PROXPAC XL is a fully integrated proximity transducer assembly for critical rotating machinery monitoring.
It combines the probe, Proximitor® sensor, housing, and mounting hardware into one robust industrial-grade solution.
Therefore, installation complexity is significantly reduced while long-term measurement stability is consistently maintained in demanding environments.
This assembly belongs to the proven 3300 XL platform, widely trusted in turbomachinery protection applications worldwide.
Moreover, its factory-matched configuration ensures predictable performance without additional field calibration requirements.

Functional Highlights

Integrated construction minimizes wiring errors and simplifies commissioning during new installations or retrofit projects.
In addition, the eddy-current sensing technology delivers precise shaft vibration and position measurements under dynamic operating conditions.
The rugged stainless steel housing withstands oil, vibration, and thermal stress common in turbine and compressor casings.
Therefore, maintenance teams benefit from reduced downtime and improved diagnostic confidence throughout the equipment lifecycle.
For instance, consistent scale factor performance supports reliable trending and alarm accuracy in protection systems.

Technical Specifications

Parameter | Specification
Model Number | 330880-28-40-058-01-02
Product Type | 3300 XL 8 mm Proximity Transducer Assembly (PROXPAC XL)
Probe Tip Diameter | 8 mm
System Type | Eddy-current proximity transducer assembly
Linear Range | 4.0 mm (160 mils)
Initial Gap | 0.5 mm (20 mils)
Scale Factor | 3.94 V/mm (100 mV/mil)
Frequency Response | 0 to 10 kHz
Target Material | AISI 4140 steel (standard)
Probe Tip Material | Polyphenylene sulfide (PPS)
Probe Case Material | AISI 303 or 304 stainless steel
Cable Type | 75 Ω coaxial, FEP insulated
Operating Temperature | -52°C to +177°C (-62°F to +350°F)
Output Signal | Analog voltage proportional to displacement

Typical Applications

This transducer assembly supports continuous vibration and position monitoring in steam and gas turbine installations.
Moreover, centrifugal compressors and large pumps rely on its accuracy for early fault detection.
It integrates seamlessly into machinery protection systems used in power generation, oil, and gas facilities.
Therefore, engineers can implement consistent measurement strategies across multiple critical assets.

Reliability and Service

Each PROXPAC XL assembly is factory tested to meet Bently Nevada quality and performance standards.
In addition, the sealed construction protects sensitive electronics from moisture, contamination, and mechanical damage.
The standardized design simplifies spare parts management and long-term service planning for maintenance teams.

FAQ

Q: What makes the PROXPAC XL different from separate probe and sensor installations?
A: The PROXPAC XL integrates all components into one matched assembly, reducing installation errors and improving reliability.

Q: Can this model be used with existing 3300 XL monitoring systems?
A: Yes, it is fully compatible with Bently Nevada 3300 XL vibration and protection platforms.

Q: Is the assembly suitable for high-temperature turbine environments?
A: Yes, it operates reliably up to +177°C, making it suitable for most turbomachinery applications.

Q: Does the assembly require field calibration after installation?
A: No, factory calibration ensures consistent scale factor performance without additional field adjustment.