Bently Nevada 330703-050-120-10-02-00 3300 XL 11 mm Proximity Probe

Description

Option 050 (50 mm unthreaded length), Option 120 (120 mm case length), and Option 02 (standard cable ClickLoc connector) specify this M14 x 1.5 metric proximity probe configuration — 330703-050-120-10-02-00. This non-contact eddy-current displacement sensor is designed for installation in 3300 XL 11 mm transducer systems, where it operates in conjunction with a 330780 Proximitor sensor and a 330730 extension cable. Operating without mechanical armor, the probe is equipped with a standard 75 ohm triaxial FEP-insulated lead cable that provides robust moisture and environmental protection.

Unlike armored configurations (such as model 330704) or variants requiring extensive agency certifications (Option 05), this standard-mount metric probe provides a simplified installation for general-purpose, non-hazardous industrial areas. It yields a calibrated linear range of 4.0 mm (160 mils) with an incremental scale factor (ISF) of 3.94 V/mm (100 mV/mil), enabling highly precise displacement, vibration, and rotor position measurements on critical rotating machinery like compressors, steam turbines, and large industrial pumps.

Features

• Metric thread size of M14 x 1.5 without mechanical armor (base model 330703)
• Unthreaded probe case length of 50 mm (Option 050)
• Overall case length of 120 mm (Option 120)
• Total integrated cable length of 1.0 meter (3.3 feet) (Option 10)
• Miniature coaxial ClickLoc connector on a standard FEP triaxial cable (Option 02)
• General industrial standard configuration with no agency approvals required (Option 00)
• Tight pressure sealing at the tip utilizing a built-in Viton O-ring
• Pre-drilled locknut supplied as standard with safety wire holes

Applications

• Steam turbine and centrifugal compressor shaft vibration monitoring
• Rotor position and axial thrust displacement measurement
• Machinery protection systems on 11 mm proximity probe loops
• Industrial rotating machinery diagnostics in non-hazardous environments

Ordering Information

Technical Specifications

Connections and Interfaces

Installation Guidelines

To achieve the highest measurement accuracy and prevent mechanical binding, adhere to the following installation guidelines:

• Maximum Thread Engagement: For M14 x 1.5 threaded cases, the maximum thread engagement is 21 mm. Exceeding this length may cause thread binding during installation.
• Minimum Bend Radius: Maintain a minimum cable bend radius of 25.4 mm (1.0 in) for standard unarmored coaxial cables.
• Connector Protection: Use a fluorosilicone connector protector or self-fusing silicone tape on the probe-to-extension cable junction to shield against moisture, dust, and turbine oil ingress.
• Target Alignment: Ensure the probe is positioned over a target surface of AISI 4140 steel (or calibrated target material) with a recommended flat diameter of at least 30.5 mm (1.2 in).
• Tightening Torque: Secure the probe case using the standard locknuts. Tighten to a recommended torque of 21.1 N-m (187 in-lb) and do not exceed the maximum rated limit of 63.3 N-m (560 in-lb).

Compliance and Certifications

This proximity probe is manufactured to meet rigorous quality control standards and is compliant with general European industrial standards:

• Electromagnetic Compatibility (EMC): Complies with European Community Directive 2014/30/EU, satisfying requirements for EN 61000-6-2 (Industrial Immunity) and EN 61000-6-4 (Industrial Emissions).
• Restriction of Hazardous Substances (RoHS): Complies with RoHS Directive 2011/65/EU and is marked under China RoHS regulations.
• Pressure Sealing: Standard probe construction designed to seal differential pressure between the probe tip and case utilizing a built-in Viton O-ring.