Product Overview

The 330881-BR-04-150-06-02 is an all-in-one proximity transducer housing from Bently Nevada’s PROXPAC XL series. This assembly represents a significant advancement in machinery monitoring by integrating the 3300 XL Proximitor sensor directly into the housing cover. This self-contained architecture eliminates the need for intermediate extension cables and external Proximitor enclosures, allowing for a streamlined installation where field wiring connects directly from the machine to the control system. Designed for high-performance shaft vibration and position measurements, it provides the same ease of access and adjustability as the 31000/32000 series while offering superior protection for the internal sensing electronics.

Robust Hardware Configuration and Physical Properties

The construction of the PROXPAC XL housing utilizes high-performance materials to ensure longevity in corrosive or electrically active environments.

• Main Body Material: Glass-reinforced Polyphenylene Sulfide (PPS) conductive thermoplastic

• Environmental Sealing: Rated to IP66 and Type 4X standards

• Weight: 1.5 kg (Assembly weight) / 0.06 kg (Probe component)

• Standard Dimensions: 1.8 cm x 1.6 cm x 123 cm (Probe reach/sleeve length)

• Probe Integration: Built-in 3300 XL 8 mm proximity probe

• Penetration Depth: 150 mm probe penetration capability

• Standoff Adapter: 40 mm option

• Installation Kit: Includes 3/4-14 NPT fitting, 3/4-14 NPT to 1/2-14 NPT reducer, and sealing plugs

• Electrostatic Control: Conductive fibers integrated into the shell for charge dissipation

Critical Machinery Monitoring Scenarios

The 330881-BR-04-150-06-02 is essential for predictive maintenance in heavy industry, particularly where space for separate sensor housings is limited or where environmental exposure is high.

• Shaft Vibration Analysis: Measuring radial vibration on high-speed turbines and compressors to detect early signs of bearing wear or rotor imbalance.

• Axial Position Tracking: Monitoring thrust movement in large rotating equipment to prevent catastrophic contact between rotating and stationary parts.

• Remote Field Installations: Ideal for outdoor or offshore applications where the IP66/Type 4X rating protects the electronics from rain, salt spray, and dust.

• Turbine Supervisory Instrumentation (TSI): Seamless integration into TSI racks for real-time equipment health monitoring and automated trip protection.

FAQ

Q: How does the integrated Proximitor sensor benefit the installation?

By housing the Proximitor sensor within the assembly cover, the system eliminates the signal loss and potential failure points associated with extension cables, significantly reducing installation complexity and cost.

Q: Why is Polyphenylene Sulfide (PPS) used instead of aluminum or steel?

PPS is a high-strength thermoplastic that offers superior chemical resistance and does not corrode. When reinforced with conductive fibers, it provides effective EMI shielding and electrostatic dissipation comparable to metal.

Q: Can this housing be used in wet or outdoor environments?

Yes, the assembly is rated for Type 4X and IP66, meaning it is protected against heavy seas and powerful jets of water, as well as dust and wind-blown debris.

Q: What is the purpose of the included reducer and plugs in the fitting kit?

The fitting kit allows for versatile conduit connections, ensuring the housing can interface with either 3/4-inch or 1/2-inch NPT wiring systems while maintaining a moisture-tight seal.

Q: Is the 330881-BR-04-150-06-02 compatible with existing 3300 XL monitoring systems?

Absolutely. Since it utilizes the standard 3300 XL Proximitor technology internally, the output signals are fully compatible with Bently Nevada 3500 series racks and other TSI-standard monitoring equipment.