Bently Nevada 330780-51-05 3300 XL 11 mm Proximitor Sensor

Description

Option 51 (5.0 meter system length, DIN mount) and Option 05 (Multiple Approvals) specify this 3300 XL 11 mm Proximitor Sensor configuration — 330780-51-05. The 3300 XL 11 mm system features an incremental scale factor of 3.94 V/mm (100 mV/mil) for non-contact displacement and vibration measurements. The system is used on fluid-film bearing machines where an extended linear range is required, including turbine axial (thrust) position, ramp differential expansion, and reciprocating compressor rod drop monitoring.

This 330780-51-05 sensor processes the RF signal from a compatible 3300 XL 11 mm proximity probe and extension cable, outputting a voltage signal proportional to the distance between the probe tip and the observed shaft surface. The unit mounts on standard 35 mm DIN rails and is compatible with 3500 series machinery protection systems and secondary monitors.

Features

• Option 51 specifies a 5.0 meter (16.4 feet) system length combined with an integrated DIN-mount physical layout.
• Option 05 delivers multiple international hazardous area agency approvals including ATEX, IECEx, and CSA.
• Generates a linear range of 4.0 mm (160 mils) for reliable tracking of larger rotor and shaft movements.
• Provides an output scale factor of 3.94 V/mm (100 mV/mil) with high accuracy and low thermal drift.
• Encased in an A380 aluminum housing for high mechanical integrity and environmental protection.

Applications

The 330780-51-05 Proximitor Sensor is used in rotating machinery monitoring where an extended linear range is required. Typical application areas include:

• Steam turbine axial (thrust) position and ramp differential expansion tracking
• Reciprocating compressor rod position and rod drop measurements
• High-speed industrial turbine and compressor shaft vibration monitoring
• Tachometer, phase reference (Keyphasor), and zero speed signal generation

Ordering Information

The 330780-51-05 Proximitor Sensor is configured using the following structured options:

Technical Specifications

Connections and Interfaces

Installation Guidelines

Proper installation ensures stable, noise-free vibration and position data. Observe the following guidelines:

• Mounting: Mount on a standard 35 mm DIN rail. Ensure a physical clearance of at least 3.05 mm (0.12 in) is maintained above and below the mounting pad to allow easy removal.
• Wiring: Connect using 0.2 to 1.5 mm2 (16 to 24 AWG) shielded three-conductor triad field wiring. Keep field wiring length under 305 meters (1000 feet) to prevent high-frequency signal attenuation.
• Grounding: Ensure proper shield terminal grounding at the monitor side only. Do not double-ground.
• Environmental Protection: If terminals are exposed to direct moisture or dust, the Proximitor must be installed within a protective enclosure providing at least IP54 protection.

Compliance and Certifications

The 330780-51-05 Proximitor Sensor has option 05 approvals, which verify compliance with multiple standard requirements:

• ATEX/IECEx: Intrinsically Safe (Ex ia IIC T4/T5 Ga, Ex ia IIIC T90C/T105C Dc) and Non-Sparking/Ec (Ex nA/ec IIC T5...T1 Gc)
• North American (cNRTLus): Class I, Zone 0, AEx/Ex ia IIC T4/T5 Ga; Class I, Div 1, Groups A, B, C, D; Class I, Div 2, Groups A, B, C, D
• Electromagnetic Compatibility: EN 61000-6-2 (Industrial Immunity) and EN 61000-6-4 (Industrial Emissions), CE compliant
• Functional Safety: SIL 2 certified (HFT = 0), SIL 3 compliant (HFT = 1)
• RoHS: Compliant with European Directive 2011/65/EU