Bently Nevada 330850-91-05 3300 XL 25 mm Proximitor Sensor

Description

330850-91-05: 3300 XL 25 mm Proximitor Sensor configured for a 9.0-metre system length with integrated DIN-mount support (Option 91) and multiple hazardous area agency approvals (Option 05).

This Proximitor sensor is calibrated to pair with a 3300 XL 25 mm proximity probe and a matching extension cable to form a complete 9.0-metre transducer system. Compared to panel-mount configurations or shorter 5.0-metre systems, this model features a pre-installed DIN-mount pad that allows secure installation onto standard 35 mm DIN rails, simplifying industrial enclosure layouts. It is calibrated by default for AISI 4140 steel targets, serving large-target eddy-current displacement measurements such as steam turbine thrust position and differential expansion.

Features

• Option 91 provides 9.0-metre total system length calibration, matching the combined electrical length of the probe and extension cable.
• DIN-mount mounting pad (Option 91) facilitates rapid installation onto standard 35 mm DIN rails.
• Option 05 Multiple Approvals package offers certified protection for installation in Class I Division 1/2 and Zone 0/1/2 hazardous areas.
• SpringLoc terminal strips provide reliable, tool-free terminal wiring, securing 0.2 to 1.5 mm2 (16 to 24 AWG) field cables.
• Active RF shield design minimizes interference from nearby high-frequency radio signals, preserving sensor accuracy.

Applications

• Steam turbine thrust position monitoring
• Differential expansion measurement on high-capacity rotating machinery
• Large shaft target axial displacement tracking
• Rod-drop monitoring in reciprocating compressors

Ordering Information

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Mount securely on standard 35 mm DIN rail inside an IP54 or better protective enclosure.
• Ensure a minimum clearance of 3.05 mm (0.120 in) is maintained for DIN rail insertion and removal.
• Avoid routing field wiring parallel to high-voltage power cables to mitigate electromagnetic interference.
• Apply self-fusing silicone tape or connector protectors over coaxial connections to prevent moisture contamination.
• Connect the field wiring shield exclusively at the monitor end to eliminate potential ground loop issues.

Compliance and Certifications

• ATEX/IECEx: Ex ia IIC T5...T1 Ga, Ex ia IIIC T90degC...T280degC Dc, Ex nA IIC T4/T5 Gc, Ex ec IIC T4/T5 Gc
• CSA/US: Class I, Zone 0: AEx/Ex ia IIC T5...T1 Ga; Class I, Groups A, B, C, D; Class II, Groups E, F, G; Class III
• CE Mark: Fully compliant with European Union EMC and hazardous area directives