Bently Nevada 330703-000-040-50-11-00 3300 XL 11 mm Proximity Probe

Description

Unarmored M14 x 1.5 threaded probe body (Option 000) with a 40 mm case length (Option 040) and a 5.0 m total cable length (Option 50) specifies the 330703-000-040-50-11-00 3300 XL 11 mm Proximity Probe. This non-contacting eddy-current sensor is utilized within 3300 XL 11 mm monitoring chains to measure shaft displacement, dynamic vibration, or static axial position relative to fluid film bearings.

This metric-threaded configuration differs from common imperial-threaded models (such as the 330701 series) and armored variations (such as the 330704 series) by featuring a bare, unarmored FEP-insulated coaxial cable. Equipped with Option 11, it incorporates a specialized FluidLoc cable to block process fluid leakage migration along the internal conductor spacing, paired with an integrated coaxial connector protector designed for wet or high-humidity installations. The 5.0 m total system length matches the electrical calibration requirements of a 5.0 m Proximitor Sensor, allowing direct termination without an intermediary extension cable.

Features

• Metric M14 x 1.5 threaded steel probe body without external protective armor
• Option 000 fully threaded design providing 0 mm unthreaded length
• Option 040 providing 40 mm total case length for shallow thread engagement
• Option 50 providing a 5.0 m (16.4 feet) integrated triaxial cable length
• Option 11 FluidLoc cable style to prevent oil and fluid migration through the cable interior
• Gold-plated brass ClickLoc coaxial connector with pre-installed fluorosilicone connector protector
• Calibrated for standard AISI 4140 steel target surfaces

Applications

• Axial (thrust) position measurements on large steam and gas turbines
• Ramp differential expansion measurements on industrial power generation turbines
• Rod position or rod drop monitoring on reciprocating compressors
• Radial vibration and shaft positioning on heavy rotating machinery
• Keyphasor phase reference and zero-speed tachometer signals

Ordering Information

Technical Specifications

Installation Guidelines

• Position the probe to the nominal gap of 2.5 mm (100 mils) from the target surface, corresponding to the electrical midpoint of the linear range.
• Tighten the M14 x 1.5 thread body utilizing the integrated wrench flats. Torque to the recommended 21.1 N-m (187 in-lb) and do not exceed the maximum limit of 63.3 N-m (560 in-lb).
• Maintain a minimum cable routing bend radius of 25.4 mm (1.0 in) to prevent internal coaxial conductor degradation.
• Avoid installing with thread engagement lengths exceeding 21 mm to prevent binding during mounting.
• Ensure the pre-installed connector protector is fully seated and dry before completing the coaxial interface.

Compliance and Certifications

• Electromagnetic Compatibility (EMC): European Community Directive 2014/30/EU
• EMC Standards: EN 61000-6-2 (Immunity), EN 61000-6-4 (Emissions)
• Restriction of Hazardous Substances (RoHS): European Community Directive 2011/65/EU
• Damp Heat Resistance: Tested in accordance with IEC 68-2-3 standards