Bently Nevada 330906-02-12-05-02-05 3300 NSv Reverse Mount Probe

Description

330906-02-12-05-02-05 specifies this reverse-mount configuration of the 3300 NSv proximity probe, featuring a 3/8-24 UNF-2A threaded body with a 0.2-inch unthreaded length and a 1.2-inch overall case length. Used primarily in tight-clearance machinery installations where standard-mount sensor geometry is too restrictive, this probe has its cable exit from the thread end rather than the tip side.

Unlike standard-mount probes in the 3300 NSv family, reverse-mount probes like this variant do not support stainless steel armor or connector protectors. This specific assembly is supplied with a 0.5-meter (20-inch) standard coaxial cable terminating in a miniature male ClickLoc connector, and it carries multiple international approvals for use in hazardous areas.

Features

• Thread configuration: 3/8-24 UNF-2A thread optimized for reverse-mount sleeve or bulkhead applications.
• Unthreaded case portion: 0.2-inch unthreaded length (Option 02) with a 1.2-inch overall case length (Option 12).
• Total probe length: 0.5 meters (20 inches) of standard non-armored coaxial cable (Option 05).
• Connector style: Gold-plated miniature coaxial ClickLoc connector with standard FEP jacket (Option 02).
• Agency approvals: Multiple approvals package (Option 05) certified for Class I, Division 1 and 2, and Zone 0 and 2 applications.
• Materials: Chemical-resistant polyphenylene sulfide (PPS) probe tip and AISI 304 stainless steel case.
• Interchangeability: Mechanically and electrically compatible with prior 3300 RAM systems.

Applications

This transducer is used in industrial rotating machinery for non-contact eddy-current displacement measurements, including:

• Radial vibration and radial position on shafts smaller than 51 mm (2 inches).
• Axial (thrust) position on flat targets smaller than 15 mm (0.6 inches).
• Centrifugal air compressors, process gas compressors, and refrigeration systems.
• High-speed aeroderivative turbines and machinery with counterbore or sideview restrictions.

Ordering Information

Technical Specifications

Installation Guidelines

• Mounting: Install the probe into a compatible sleeve or bulkhead from the rear casing side. Avoid exceeding the maximum thread engagement length of 0.563 inches for 3/8-24 UNF threads.
• Torque Limits: Tighten the probe case to a recommended torque of 7.5 N-m (66 in-lb). Do not exceed the maximum rated limit of 22.6 N-m (200 in-lb) to prevent thread deformation.
• Connector Assembly: Secure the miniature male ClickLoc connector to the extension cable female connector finger-tight. The maximum recommended torque is 0.56 N-m (5 in-lb).
• Environmental Protection: Protect the connector coupling with silicone self-fusing tape or a connector protector kit to prevent fluid ingress. Do not use silicone tape inside the machine casing.

Compliance and Certifications

• EMC: European Community Directive 2014/30/EU (EN 61000-6-2, EN 61000-6-4)
• RoHS: European Community Directive 2011/65/EU
• China RoHS: EFUP designation of 15 years per SJ/T 11364-2024
• Functional Safety: Certified up to SIL 2 (HFT = 0) or SIL 3 (HFT = 1)
• Hazardous Area Approvals (Option 05): Includes ATEX/IECEx and CSA approvals for intrinsically safe (Ex ia IIC T4/T5 Ga) and non-sparking/increased safety (Ex nA/ec IIC T4/T5 Gc) installations.