Bently Nevada 330881-28-04-145-03-02 PROXPAC XL Proximity Transducer

Description

Option 28 (3300 XL 8 mm probe with Multiple Approvals) and Option 04 (40 mm standoff adapter) define the metric configuration of this specialized PROXPAC XL Proximity Transducer — 330881-28-04-145-03-02. This integrated assembly features a 145 mm probe penetration length (Option 145) protected by a durable sleeve, a mounting configuration with a 3/4-14 NPT thread (Option 02), and a fittings kit with one M20 conduit fitting and two plugs (Option 03).

By combining a high-accuracy 3300 XL 8 mm proximity probe and an integrated 3300 XL Proximitor sensor within a single, self-contained Polyphenylene Sulfide (PPS) housing, this design eliminates the need for separate extension cables and intermediate junction boxes. This metric setup simplifies installation and provides robust mechanical and environmental shielding for critical rotating machinery monitoring, making it highly effective for harsh industrial conditions.

Features

• Option 28 probe integration combines a 3300 XL 8 mm proximity probe with multiple approvals directly within the transducer housing.
• Option 04 standoff adapter provides a 40 mm standoff dimension for precise offset positioning during installation.
• Option 145 penetration designates a 145 mm sleeve depth to reach internal measurement targets effectively.
• Option 03 fitting package supplies one M20 conduit fitting and two plugs to simplify cable entry seal execution.
• Option 02 mounting thread specifies a 3/4-14 NPT connection, meeting the mechanical requirements for standoff adapter support.
• Thermoplastic PPS housing features a glass- and conductive-fiber reinforced design that provides Type 4X and IP66 environmental protection while dissipating electrostatic charges.
• Integrated Proximitor sensor layout eliminates the field-wiring requirement for intermediate extension cables and separate transmitter enclosures.

Applications

Typical applications include:

• Shaft vibration and axial position measurements on steam turbines, gas turbines, and large industrial compressors.
• Radial vibration and displacement monitoring on high-speed rotating machinery in hazardous areas requiring multiple regional certifications.
• Severe-duty petrochemical, power generation, and water treatment installations where direct-exposure and chemical resistance are critical.

Ordering Information

Technical Specifications

Installation Guidelines

• Grounding Practices: The PROXPAC XL housing must be properly grounded using the built-in grounding liner and retaining plate.
• Moisture Prevention: Ensure that all conduit paths are completely sealed to prevent moisture from migrating through the conduit into the plastic housing.
• Temperature Limits: Do not expose the probe tip to temperatures below -34 degC (-29 degF) to prevent premature failure of the internal pressure seal.
• Sleeve Support: If the combined standoff adapter (B) and penetration (C) lengths exceed 305 mm (12.0 in), implement additional external sleeve support near the probe to increase assembly stiffness and eliminate resonant vibration.

Compliance and Certifications

• CE Mark: Complies with applicable European Union directives.
• IP Rating: Housing rated to IP66 (verified by BASEEFA).
• Hazardous Area Approvals (CNRTLUS): Class I, Zone 0: AEx/Ex ia IIC T4/T5 Ga; Class I, Groups A, B, C, D; Class II, Groups E, F, G; Class III. Class I, Zone 2: AEx/Ex nA IIC T5...T1 Gc; Class I, Division 2, Groups A, B, C, D; Class I, Zone 2: AEx/Ex ec IIC T5...T1 Gc.
• Hazardous Area Approvals (ATEX/IECEx): II 1 G, Ex ia IIC T4/T5 Ga; Ex ia IIIC T90C/T105C Dc. II 3 G, Ex nA IIC T4/T5 Gc; Ex ec IIC T4/T5 Gc.