Product Overview

The Bently Nevada 330880-28-00-105-02-02 is a premium PROXPAC XL Proximity Transducer. This device provides reliable shaft vibration and position measurements. Engineers trust this sensor for its high accuracy and rugged design. The model 330880-28-00-105-02-02 works perfectly with 3300 XL monitoring systems. Its robust construction ensures stable performance in harsh industrial environments.

Technical Specifications

Measurement & Performance

This transducer offers a linear range of 2 mm (80 mils). The linear range starts at 0.25 mm from the target. It extends from 0.25 mm to 2.3 mm (10 to 90 mils). The output voltage spans approximately -1 Vdc to -17 Vdc. The recommended gap setting is 1.27 mm (50 mils).

The Incremental Scale Factor (ISF) is 7.87 V/mm (200 mV/mil). This value includes a ±5% interchangeability error. The system measures this over the 80 mil linear range. The temperature range for this measurement is 0 °C to +45 °C. The Deviation from Straight Line (DSL) is less than ±0.025 mm (±1 mil).

Frequency Response & Resolution

The frequency response goes from 0 to 10 kHz. The signal drops by only -3 dB at the high end. This performance includes up to 305 meters of field wiring. The minimum target size is 15.2 mm (0.6 inches) diameter. The minimum shaft diameter is 50.8 mm (2.0 inches). These parameters ensure accurate readings on standard machinery.

Environmental & Power Requirements

The probe tip uses Polyphenylene Sulfide (PPS) material. The probe case is AISI 304 stainless steel. This sensor operates from -51 °C to +177 °C (-60 °F to +350 °F). Do not expose the probe below -34 °C without caution. Cold temperatures may damage the pressure seal.

The power supply requires -17.5 Vdc to -26 Vdc without barriers. With barriers, use -23 Vdc to -26 Vdc. Supply sensitivity is very low at less than 2 mV change per volt change. Output resistance is 50 Ω. The housing carries an IP66 rating verified by BASEEFA.

Mechanical Strength & Materials

The probe tensile strength reaches 330 N (75 lbs) between cable and case. The housing uses UV-resistant glass-reinforced PPS thermoplastic. It contains conductive fibers for static dissipation. The sleeve and retaining chain use AISI 304 stainless steel. Outer sleeve and screws use AISI 303 stainless steel. The sleeve O-ring is made of Neoprene.

The grounding liner and retaining plate use AISI 304 stainless steel. Vibration isolation uses extra soft cellular silicone. The lid label is gloss radiant white polyester. Recommended torque for the retaining nut is 29.5 N·m (260 in·lb). The probe sleeve locknut torque is 39.3 N·m (350 in·lb).

The housing supports 912 N (205 lbs) of force. This force applies 38 mm from the unsupported end. Impact strength meets BASEEFA certification for 4 Joule impacts. The device withstands impacts at -39 °C and +115 °C. CSA also verified a 7 Joule impact at room temperature.

Installation Guide

Follow these steps to install the Bently Nevada 330880-28-00-105-02-02 properly. First, prepare a clean mounting surface. Use the 3/4-14 NPT fittings included with the unit. The package contains two fittings and one plug. Second, mount the probe with the correct gap. Set the air gap to 1.27 mm (50 mils) for best results.

Third, tighten the retaining nut to 29.5 N·m. Do not exceed this torque value. Fourth, connect the field wiring using 16 to 24 AWG wire. Use 3-conductor shielded triax cable for best signal quality. The maximum field wiring length is 305 meters (1000 feet). Longer cables may reduce high-frequency response. Fifth, secure the housing lid after wiring. Verify the O-ring sits properly for IP66 protection.

Package Contents

• One Bently Nevada PROXPAC XL Proximity Transducer (Model 330880-28-00-105-02-02)

• One 3300 XL 8 mm probe with multiple approvals

• One 1-metre triaxial cable with FEP insulation

• Two 3/4-14 NPT fittings and one plug

• One gold-plated brass ClickLoc connector

• One mounting sleeve with locknut

• One grounding liner and retaining plate

• One vibration isolation pad

• Installation instruction sheet

Frequently Asked Questions (FAQ)

1. What is the linear range of the 330880-28-00-105-02-02?
The linear range is 2 mm (80 mils). It starts at 0.25 mm from the target. The range extends to 2.3 mm for reliable vibration monitoring.

2. Can I use the Bently Nevada 330880-28-00-105-02-02 in wet environments?
Yes, the housing has an IP66 rating. It resists powerful water jets and dust ingress. BASEEFA verified this rating for industrial use.

3. What is the maximum cable length for this transducer?
You can run up to 305 metres (1000 feet) of field wiring. Use 3-conductor shielded triax cable. Longer cables may reduce the frequency response above 10 kHz.

4. How do I set the correct gap for the 330880-28-00-105-02-02?
Set the gap to 1.27 mm (50 mils) from the target. This gap produces approximately -10 Vdc output. Use a micrometer or precision tool for best accuracy.

5. What happens if the supply voltage drops below -23.5 Vdc?
Operating below -23.5 Vdc reduces the linear range. The sensor may not measure full 2 mm travel. Always maintain voltage between -23 Vdc and -26 Vdc with barriers installed.