Product Overview

The Bently Nevada 330880-28-30-037-01-02 is a complete PROXPAC XL proximity measurement system. This device monitors shaft vibration, position, and phase reference on rotating machinery. It features a 3300 XL 8 mm probe with multiple global approvals for hazardous areas. This model includes a 3 inch standoff adapter for extended reach from the mounting surface. You get reliable performance for turbines, compressors, and pumps in critical environments.

Technical Specifications

Configuration Details

• Probe Option: 3300 XL 8 mm probe with multiple global approvals.

• Standoff Adapter Option (B Dimension): 3 inches (76 mm).

• Probe Penetration Option (C Dimension): 37 mm.

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

• Mounting Thread Option: 3/4-14 NPT required with standoff adapter.

• Total System Weight: 1.44 kg typical.

Measurement & Performance

• Linear Range: 2 mm (80 mils) from 0.25 mm to 2.3 mm gap.

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

• Deviation from Best Fit Straight Line (DSL): Less than ±0.025 mm (±1 mil).

• Frequency Response: 0 to 10 kHz with +0, -3 dB rating.

• Recommended Gap Setting: 1.27 mm (50 mils).

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

• Minimum Shaft Diameter: 50.8 mm (2.0 in).

Electrical Characteristics

• Power Requirement: -17.5 Vdc to -26 Vdc without barriers at 12 mA max.

• Power with Barriers: -23 Vdc to -26 Vdc required.

• Voltage Warning: Operation above -23.5 Vdc reduces linear range.

• Supply Sensitivity: Less than 2 mV output change per volt input change.

• Output Resistance: 50 Ω.

• Field Wiring: 0.2 to 1.5 mm² (16 to 24 AWG) shielded triax cable.

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

Environmental Limits

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

• Low Temperature Note: Exposure below -34 °C (-29 °F) may cause premature pressure seal failure.

• Housing Rating: IP66 verified by BASEEFA report number T07/0709.

• Housing Impact Strength: Withstands 4 Joule impacts at -39 °C and +115 °C.

• CSA Impact Verification: Withstands 7 Joule impact at ambient room temperature.

Mechanical Construction

• Probe Tip Material: Polyphenylene Sulfide (PPS).

• Probe Case Material: AISI 304 stainless steel.

• Probe Cable: 1-metre length, 75 Ω triaxial with FEP insulation.

• Probe Connector: Gold-plated brass ClickLoc® type.

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

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

• Sleeve Material: AISI 304 stainless steel.

• Outer Sleeve and 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.

• Recommended Torque (Retaining Nut): 29.5 N·m (260 in·lb).

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

Housing Strength Data

• Static Load Support: Housing supports 912 N (205 lbf) placed 38 mm from unsupported end.

• Test Condition: Outer sleeve mounted with axis parallel to horizontal.

• Cover Status: Fastened in place with grounding liner installed.

• Total System Weight: 1.44 kg typical with 0.3 metre (12 inch) sleeve length.

Installation Guide

Follow these steps to install the Bently Nevada 330880-28-30-037-01-02 correctly. First, mount the outer sleeve on a rigid test stand with axis parallel to horizontal. Second, install the 3 inch standoff adapter between the housing and mounting surface. Third, secure the housing using the 3/4-14 NPT mounting thread. Fourth, tighten the retaining nut to 29.5 N·m (260 in·lb). Fifth, set the probe gap to 1.27 mm (50 mils) from the target. Sixth, connect field wiring using 3-conductor shielded triax cable. Finally, verify supply voltage stays between -23 Vdc and -26 Vdc when using barriers.

Package Contents

• 1 x PROXPAC XL Proximitor housing assembly.

• 1 x 3300 XL 8 mm probe with multiple approvals and 1-metre triaxial cable.

• 1 x Standoff adapter (3 inch / 76 mm B dimension).

• 1 x 3/4-14 NPT fitting and two plugs.

• 1 x Mounting thread adapter (3/4-14 NPT).

• 1 x Grounding liner and retaining plate (AISI 304).

• 1 x Outer sleeve with retaining screws.

• 1 x Sleeve O-ring (Neoprene material).

• 1 x Vibration isolation pad (extra soft cellular silicone).

Frequently Asked Questions (FAQ)

Q1: What approvals does the probe carry on the Bently Nevada 330880-28-30-037-01-02?
A: The -28 probe option means this 3300 XL 8 mm probe includes multiple global approvals. These typically include ATEX, CSA, and IECEx for hazardous area use. This makes the Bently Nevada 330880-28-30-037-01-02 suitable for explosive environments.

Q2: What is the total probe penetration including the standoff adapter?
A: The standoff adapter adds 3 inches (76 mm) to the mounting distance. The probe penetration (C dimension) is 37 mm from the adapter end. Total reach from the mounting surface equals the standoff length plus the probe penetration.

Q3: Can I use the Bently Nevada 330880-28-30-037-01-02 in very cold environments?
A: The probe operates from -51 °C to +177 °C. However, exposing the probe to temperatures below -34 °C may cause premature failure of the pressure seal. Avoid long-term operation below -34 °C for best reliability.

Q4: What fittings come with this PROXPAC XL transducer?
A: This is option -01 for fittings. You receive one 3/4-14 NPT fitting and two plugs. The mounting thread is also 3/4-14 NPT as required with the standoff adapter.

Q5: What happens if I supply a voltage more positive than -23.5 Vdc to this transducer?
A: Operation above -23.5 Vdc reduces the linear measurement range. You will lose accuracy near the -1 Vdc to -17 Vdc output window. Always use -23 Vdc to -26 Vdc when barriers are present for best results.