Bently Nevada 330850-90-05 3300 XL 25 mm Proximitor Sensor

Description

Option 90 (9.0 m system length, panel mount) and Option 05 (Multiple Approvals) define this specific 3300 XL 25 mm Proximitor Sensor configuration — 330850-90-05. The sensor is engineered to perform non-contact, large-target eddy-current displacement measurements, particularly in thrust position, differential expansion, and rod-drop monitoring applications on high-speed rotating machinery.

Unlike 5.0 m counterparts, this 9.0 m Proximitor sensor is factory-calibrated to match the electrical profile of a complete 9.0 m system length, which includes a 3300 XL 25 mm probe and a matching extension cable. The A380 aluminum housing provides physical protection and shield isolation, making it suitable for demanding industrial environments. The integrated multiple agency approval package ensures compliance with international safety standards for explosive atmospheres.

Features

• Option 90 provides 9.0-meter system length calibration for seamless integration with matching 9.0-meter probe and cable assemblies.
• Panel-mount configuration enables secure, direct mechanical installation to flat surfaces or standard enclosures.
• Option 05 delivers comprehensive multiple agency approvals (including CSA, ATEX, IECEx, and NEPSI) for intrinsically safe and non-sparking applications.
• Accepts input power from -17.5 Vdc to -26 Vdc under standard operating conditions.
• Delivers an extended linear range of 12.7 mm (500 mils) beginning at 0.63 mm (25 mils) from the target.
• Provides a nominal scale factor of 0.787 V/mm (200 mV/mil) for reliable displacement tracking.
• Gold-plated brass and gold-plated beryllium copper connector materials maximize signal integrity over long service periods.

Applications

Typical heavy-industry monitoring applications include:

• Steam turbine thrust position measurements
• Large-diameter shaft axial and radial displacement monitoring
• Reciprocating compressor rod-drop monitoring
• Industrial rotating machinery protection systems
• Differential expansion measurements on power generation turbines

Ordering Information

Technical Specifications

Connections and Interfaces

Installation Guidelines

For correct mounting and long-term operation of the Proximitor sensor, adhere to these guidelines:

• Field Wiring Terminal Gauge: Accepts 0.2 to 1.5 mm2 (16 to 24 AWG) field wire. Using three-conductor shielded triad cable is recommended for signal integrity.
• Maximum Distance: Do not exceed a maximum length of 305 metres (1,000 feet) between the 3300 XL Proximitor sensor and the monitoring system.
• Mounting: Mount on a flat, clean surface using the four integrated panel-mounting holes with standard 6-32 UNC screws.
• Hazardous Location Wiring: Follow the appropriate Bently Nevada installation drawing (141092 for Intrinsically Safe installations or 140979 for non-sparking/increased safety) when deploying in zones requiring safety barriers.

Compliance and Certifications

This Proximitor sensor complies with major global standards for hazardous location deployments, including:

• CE Mark: Complies with European CE directives.
• Intrinsically Safe (EPL Ga/Gc): Ex ia IIC T5...T1 Ga when installed with approved zener barriers or galvanic isolators.
• Increased Safety / Non-Sparking (EPL Gc): Ex nA IIC T5...T1 Gc and Ex ec IIC T5...T1 Gc.
• North American Classifications: Class I, Zone 0: AEx/Ex ia IIC T5...T1 Ga; Class I, Groups A, B, C, and D; Class II, Groups E, F, and G; Class III.