Description

Product Description

The Bently Nevada 330881-28-04-115-06-02 is a PROXPAC XL Proximity Transducer, an integral component for advanced machinery protection and condition monitoring systems. This specific model is engineered for high-reliability vibration, displacement, and position measurements on critical rotating equipment. As part of the Bently Nevada 3300 XL series, the PROXPAC XL design integrates a proximity probe, an extension cable, and a Proximitor Sensor into a single, robust, and armored unit. This innovative construction simplifies installation by eliminating the need for a separate extension cable and its associated interconnection, which in turn reduces the number of potential failure points and enhances overall signal integrity. The 330881-28-04-115-06-02 is designed to directly interface with comprehensive monitoring platforms like the Bently Nevada 3500 Machinery Protection System, providing the precise data required for accurate diagnostics, predictive maintenance, and operational safety. Its rugged, corrosion-resistant stainless steel body ensures long-term performance in harsh industrial environments characterized by high temperatures, moisture, and chemical exposure.

This particular configuration, the Bently Nevada 330881-28-04-115-06-02, is specified with a total case length of 280 mm (11.0 inches) and a total probe length of 4.0 meters (13.1 feet), offering significant flexibility for routing and installation in complex machinery layouts. The unit features a miniature coaxial ClickLoc™ connector, which provides a secure, vibration-resistant connection that prevents back-off and ensures continuous, reliable data transmission. The mounting configuration includes a standard 3/8-24 UNF thread, complemented by a 3/4-14 NPT adapter, allowing for versatile installation in various machine casings and mounting brackets. Furthermore, the 330881-28-04-115-06-02 holds CSA, NRTL, and C agency approvals, certifying it for safe operation in hazardous locations classified as Class I, Division 2. This makes it an ideal choice for applications in industries where explosive atmospheres may be present. By choosing the Bently Nevada 330881-28-04-115-06-02, operators and maintenance professionals are investing in a proven solution for protecting high-value assets, minimizing unplanned downtime, and optimizing machinery performance.

The PROXPAC XL transducer, including model 330881-28-04-115-06-02, operates on the eddy current principle to provide non-contact measurement of relative displacement. When installed facing a conductive target material on a machine shaft, it generates a high-frequency radio frequency (RF) signal. The interaction between the RF field and the shaft surface creates eddy currents, and the transducer’s circuitry measures the changes in impedance to determine the physical gap between the probe tip and the shaft. This data is then converted into a precise voltage signal proportional to the distance, which is used to measure parameters such as radial vibration, axial position (thrust), and shaft eccentricity. The accuracy and stability of the Bently Nevada 330881-28-04-115-06-02 make it essential for monitoring sleeve-bearing machines, where understanding the dynamic motion of the shaft within its bearings is critical for preventing catastrophic failures.

Specifications

• Part Number: 330881-28-04-115-06-02
• Manufacturer: Bently Nevada
• Product Type: PROXPAC XL Proximity Transducer
• Condition: Brand New, Factory Sealed
• Warranty: 12 Months
• System Compatibility: Fully compatible with Bently Nevada 3500 Series, 2201 Series, and 1900/65A Series Monitors
• Total Case Length: 280 mm (11.0 in)
• Total Probe Length: 4.0 m (13.1 ft)
• Connector and Cable Option: Miniature coaxial ClickLoc™ connector, standard cable
• Agency Approval Option: CSA/NRTL/C (Class I, Div 2, Groups A, B, C, D; T4 @ Ta = -34 °C to +100 °C)
• Mounting Option: 3/8-24 UNF thread with a 3/4-14 NPT adapter included
• Probe Tip Material: Polyphenylene Sulfide (PPS)
• Transducer Case Material: Stainless Steel
• Probe Pressure Limit: Hermetically sealed to withstand process fluids and gases up to specified limits.

Applications

• Power Generation: Critical for monitoring radial vibration and axial position on steam turbines, gas turbines, hydro turbines, generators, and boiler feed pumps. The 330881-28-04-115-06-02 ensures the stability and safety of these high-speed, high-value assets.
• Oil & Gas: Essential for machinery protection on upstream, midstream, and downstream equipment, including centrifugal and reciprocating compressors, process gas compressors, large pumps, and gearboxes. Its hazardous area certification (CSA/