Overview

The Bently Nevada 330880-28-20-045-01-02 is a PROXPAC XL proximity transducer. This unit belongs to the Bently Nevada 3300 XL series. It provides non-contact shaft vibration and position measurement. The 330880-28-20-045-01-02 features an 8mm probe with multiple approvals. Industrial users trust this transducer for machinery protection applications.

This PROXPAC XL system integrates the probe and proximity sensor in one housing. The design simplifies installation and reduces wiring. The unit is made in the U.S.A.

Technical Specifications

The Bently Nevada 330880-28-20-045-01-02 uses an 8mm 3300 XL probe. The probe tip material is Polyphenylene Sulfide (PPS). The probe case is AISI 304 stainless steel.

Part Number Breakdown

• Probe and Approvals Option (28): 3300 XL 8mm probe with multiple approvals

• Standoff Adapter Option (20): 2 inches (B Dimension)

• Probe Penetration Option (045): 45mm (C Dimension)

• Fittings Option (01): One 3/4-14 NPT fitting, two plugs

• Mounting Thread Option (02): 3/4-14 NPT

Measurement Specifications

• Linear Range: 2 mm (80 mils)

• Linear Range Start: Approximately 0.25 mm (10 mils) from target

• Linear Range End: 0.25 mm to 2.3 mm (10 mils to 90 mils)

• Output Voltage Range: Approximately -1 Vdc to -17 Vdc

• Recommended Gap Setting: 1.27 mm (50 mils)

• Incremental Scale Factor (ISF): 7.87 V/mm (200 mV/mil) ±5%

• Deviation from Best Fit Straight Line (DSL): Less than ±0.025mm (±1 mil) at 0°C to +45°C

Frequency and Target Requirements

• Frequency Response: 0 to 10 kHz (+0, -3 dB) with up to 305 metres of field wiring

• Minimum Target Size: 15.2 mm (0.6 in) diameter (flat target)

• Minimum Shaft Diameter: 50.8 mm (2.0 in)

Probe Environmental Limits

• Operating Temperature: -51°C to +177°C (-60°F to +350°F)

• Note: Exposing the probe below -34°C (-29°F) may cause premature pressure seal failure

Power and Output Specifications

• Power Requirement (without barriers): -17.5 Vdc to -26 Vdc at 12 mA maximum

• Power Requirement (with barriers): -23 Vdc to -26 Vdc

• Supply Sensitivity: Less than 2 mV change per volt change in input voltage

• Output Resistance: 50 Ω

• Field Wiring Size: 0.2 to 1.5 mm² (16 to 24 AWG)

• Recommended Cable: 3-conductor shielded triax cable with tinned wiring

• Maximum Field Wiring Length: 305 metres (1000 feet) between sensor and monitor

Mechanical Specifications

Housing and Materials

• Housing Material: UV resistant, glass-reinforced PPS thermoplastic with conductive fibers

• Housing Rating: IP66 (verified by BASEEFA report T07/0709)

• Sleeve Material: AISI 304 stainless steel

• Outer Sleeve Material: AISI 303 stainless steel

• Retaining Screws: AISI 303 stainless steel

• Sleeve O-Ring Material: Neoprene

• Grounding Liner Material: AISI 304 stainless steel

• Vibration Isolation Material: Extra soft cellular silicone

• Lid Label Material: Gloss radiant white polyester

Probe Cable

• Cable Length: 1 metre

• Cable Type: 75 Ω triaxial

• Cable Insulation: Fluoroethylene propylene (FEP)

• Probe Connector: Gold-plated brass ClickLoc® connector

• Probe Tensile Strength: 330 N (75 lb) maximum between cable and case

Torque Specifications

• Retaining Nut: 29.5 N·m (260 in·lb)

• Probe Sleeve Locknut: 39.3 N·m (350 in·lb)

Strength Ratings

• Housing Strength Typical: Supports 912 N (205 lbf) at 38 mm from unsupported end

• Housing Impact Strength (BASEEFA): Two separate 4 Joule (5.4 ft·lb) impacts at -39°C and 115°C

• Housing Impact Strength (CSA): 7 Joule (9.5 ft·lb) impact at ambient room temperature

Total System Weight

• Weight: 1.44 kg (3.2 lbm) typical with 0.3 metre (12 inch) sleeve length

Key Features

The 330880-28-20-045-01-02 provides a 2 mm linear range for shaft monitoring. The 7.87 V/mm scale factor delivers accurate measurements. The -51°C to +177°C probe temperature range suits harsh environments. The IP66 rated housing withstands dust and water exposure.

The PROXPAC XL design combines the probe and Proximitor sensor in one housing. This reduces installation complexity. The 1 metre triaxial cable connects directly to monitoring systems. The gold-plated ClickLoc® connector ensures reliable signal transmission.

The housing withstands significant mechanical loads. The unit supports 912 N of static load. Impact testing at extreme temperatures validates durability. The UV resistant PPS housing performs well in outdoor installations.

The transducer works with 305 metres of field wiring. Frequency response remains flat from 0 to 10 kHz. The minimum target size is 15.2 mm diameter. The minimum shaft diameter is 50.8 mm.

Installation Guidelines

Install the Bently Nevada 330880-28-20-045-01-02 according to manufacturer specifications. Use the 3/4-14 NPT mounting thread for installation. Tighten the retaining nut to 29.5 N·m (260 in·lb). Tighten the probe sleeve locknut to 39.3 N·m (350 in·lb).

Set the recommended gap to 1.27 mm (50 mils). Use a 3-conductor shielded triax cable for field wiring. Connect to a monitor with proper input impedance. Do not expose the probe below -34°C for extended periods.

Ensure the target size meets minimum requirements. The target must be at least 15.2 mm in diameter. The shaft diameter must be 50.8 mm or larger. Use a flat target surface for best results.

Package Contents

• Bently Nevada 330880-28-20-045-01-02 PROXPAC XL Proximity Transducer (1 unit)

• One 3/4-14 NPT fitting

• Two plugs for unused ports

• Installation instruction manual

Frequently Asked Questions (FAQ)

1. What is the linear range of the Bently Nevada 330880-28-20-045-01-02?
The 330880-28-20-045-01-02 has a 2 mm (80 mils) linear range. The linear range begins at approximately 0.25 mm from the target. Output voltage ranges from approximately -1 Vdc to -17 Vdc.

2. What is the recommended gap setting for this PROXPAC XL transducer?
The recommended gap setting is 1.27 mm (50 mils). This gap provides optimal performance within the linear range. Proper gap setting ensures accurate vibration measurements.

3. What is the temperature range for the probe on the 330880-28-20-045-01-02?
The probe operates from -51°C to +177°C (-60°F to +350°F). Exposing the probe below -34°C may cause premature pressure seal failure. Keep temperatures within specified limits for reliable operation.

4. What power supply does this Bently Nevada proximity transducer require?
The 330880-28-20-045-01-02 requires -17.5 Vdc to -26 Vdc without barriers. With barriers, the range is -23 Vdc to -26 Vdc. Maximum current consumption is 12 mA.

5. What is the IP rating of the PROXPAC XL housing?
The housing has an IP66 rating. This was verified by BASEEFA report number T07/0709. The housing resists dust ingress and powerful water jets.