Bently Nevada 330881-28-00-125-07-02 PROXPAC XL Proximity Transducer

Description

Option 28 (3300 XL 8 mm probe with Multiple Approvals) and Option 125 (125 mm probe penetration length) specify this metric PROXPAC XL assembly - 330881-28-00-125-07-02. This configuration combines a 3300 XL 8 mm proximity probe and an integrated Proximitor sensor inside a single glass-reinforced polyphenylene sulfide (PPS) housing. This integrated design eliminates the requirement for an external extension cable between the probe and Proximitor, routing field wiring connections directly from the monitor to the housing terminals.

Unlike standard configurations that utilize English measurements or non-approved sensors, the 330881-28-00-125-07-02 employs a metric 3/4-14 NPT mounting thread (Option 02) and is supplied with a conduit fittings kit containing one PG21 x M20 fitting and two blanking plugs (Option 07). It does not include a standoff adapter (Option 00). The assembly provides physical probe adjustment capabilities externally and complies with multiple global hazardous area certifications, making it suitable for direct installation in demanding industrial environments.

Features

• Option 28 integrates a 3300 XL 8 mm proximity probe with multiple hazardous area approvals, eliminating the separate Proximitor housing.
• Option 00 configures the assembly without an external standoff adapter, simplifying direct machine case mounting.
• Option 125 provides a metric 125 mm probe penetration length inside the protective stainless steel sleeve.
• Option 07 supplies a conduit fittings kit containing one PG21 x M20 conduit fitting and two blanking plugs for cable ingress protection.
• Option 02 specifies a 3/4-14 NPT mounting thread for securing the outer sleeve assembly.
• Polyphenylene sulfide (PPS) thermoplastic housing material is glass-reinforced and incorporates conductive fibers to dissipate electrostatic charges.
• IP66 and Type 4X environmental ratings protect the internal components from hose-directed water and corrosive atmospheres.
• Direct field wiring terminal strip inside the housing cover simplifies loop installation with no intermediate extension cable connections.

Applications

• Shaft vibration and axial position measurements on steam turbines, gas turbines, and large centrifugal compressors.
• Rotating machinery protection where space constraints or severe environmental exposure prohibit separate Proximitor enclosures.
• Direct industrial monitoring layouts requiring simplified field cabling without intermediate junction boxes or extension cables.

Ordering Information

Technical Specifications

Installation Guidelines

• Resonance Prevention: Ensure that if combined standoff adapter (B) and penetration (C) length exceeds 305 mm (12.0 in), an additional sleeve support is mounted near the probe tip to avoid resonance effects.
• Proper Sealing: Use appropriate thread sealants on the conduit threads and verify the Neoprene sleeve O-ring is fully seated to prevent moisture ingress into the electronic enclosure.
• Gap Settings: Adjust the physical probe depth during installation to target the linear range center at 1.27 mm (50 mils) or -9 Vdc terminal output.
• Torque Limits: Adhere to recommended tightening values of 29.5 N-m (260 in-lb) for the retaining nut and 39.3 N-m (350 in-lb) for the probe sleeve locknut to avoid mechanical deformation.

Compliance and Certifications

• European Conformity: CE Mark compliant.
• North American (CSA/NRTL/C): 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.
• ATEX / IECEx Certifications: II 1 G Ex ia IIC T4/T5 Ga; II 3 G Ex nA IIC T4/T5 Gc; Ex ec IIC T4/T5 Gc; II 1 D Ex ia IIIC T90C/T105C Dc.
• Environmental Resistance: Enclosure certified for Type 4X and IP66 environments.