Bently Nevada 330881-28-08-090-00-02 PROXPAC XL Proximity Transducer

Description

Option 28 (multiple-approved 3300 XL 8 mm probe), Option 08 (80 mm standoff adapter), and Option 090 (90 mm penetration) specify this integrated 330881-28-08-090-00-02 PROXPAC XL Proximity Transducer configuration with a 3/4-14 NPT mounting thread and no additional conduit fittings.

This integrated system combines a 3300 XL 8 mm proximity probe and its matching Proximitor sensor directly within a protective polyphenylene sulfide (PPS) thermoplastic housing. By consolidating these components, the assembly eliminates the requirement for separate external extension cables and standalone Proximitor enclosures. The integrated design reduces installation labor, minimizes electrical connections, and simplifies field wiring direct to monitoring racks.

Features

• Option 28 configuration includes a 3300 XL 8 mm probe pre-installed inside the protective sleeve with Multiple Approvals.
• Option 08 standoff adapter provides an 80 mm extension for external adjustment and access of the probe.
• Option 090 provides a 90 mm probe penetration length into the machinery casing.
• Option 02 mounting thread specifies a 3/4-14 NPT thread for secure mechanical integration.
• Polyphenylene sulfide (PPS) housing material containing glass and conductive fibers to dissipate electrostatic charges.
• Type 4X and IP66 environmental protection ratings for severe industrial installations.
• Integral design removes the need for an external extension cable by mounting the Proximitor sensor directly in the housing lid.

Applications

• Radial vibration and axial position monitoring on rotating machinery such as industrial steam turbines, gas turbines, and compressors.
• Machinery casing locations requiring external probe replacement or gap adjustment without complete machine teardown.
• Severe environmental installations containing high humidity, corrosive elements, or potential electrostatic hazards.
• Hazardous area machinery protection environments requiring intrinsically safe or non-incendive explosion protection.

Ordering Information

Technical Specifications

Connections and Interfaces

The field wiring terminals are located inside the housing cover on the Proximitor sensor module. A standard three-wire connection connects the PROXPAC XL to the machine monitoring system:

• Power (-Vtx)
• Signal (OUT)
• Common (COM)

Grounding is facilitated through the stainless steel grounding liner and retaining plate inside the enclosure.

Installation Guidelines

• Mounting: Secure the sleeve using the 3/4-14 NPT mounting thread (Option 02). Proper sealing of the casing entry thread is recommended to prevent process fluid leaks.
• Probe Gapping: Adjust the probe depth within the sleeve. The recommended installation gap is 1.27 mm (50 mils) from the shaft surface, which corresponds to the mid-point of the linear operating range.
• Conduit & Wiring: Route field wiring using appropriate conduit. Since Option 00 specifies no fittings, ensure proper entry glands or flexible conduit connections are used to maintain the IP66 and Type 4X ratings.
• Moisture Prevention: Ensure all plugs, washers, and housing cover screws are fully torqued. Apply sealing methods to the conduit entry to prevent condensation from traveling through the conduit into the PPS housing.
• Torque Ratings: Sleeve Locknut: 39.3 N-m (350 in-lb); Retaining Nut: 29.5 N-m (260 in-lb).

Compliance and Certifications

• CE Mark (EMC Directive 2014/30/EU: EN 61000-6-2, EN 61000-6-4)
• RoHS Directive 2011/65/EU
• CSA (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
• CSA (CNRTLus) Class I, Zone 2: AEx/Ex nA IIC T5...T1 Gc; AEx/Ex ec IIC T5...T1 Gc; Class I, Division 2, Groups A, B, C, D
• ATEX/IECEx Ex ia IIC T4/T5 Ga; Ex ia IIIC T90C/T105C Dc
• ATEX/IECEx Ex nA IIC T4/T5 Gc; Ex ec IIC T4/T5 Gc; Ex nA IIC T5...T1 Gc; Ex ec IIC T5...T1 Gc