Bently Nevada 330901-00-65-05-02-05 3300 NSv Proximity Probe

Description

330901-00-65-05-02-05 specifies this 3300 NSv proximity probe configuration featuring a 1/4-28 UNF thread without armor, 0.0 inches of unthreaded body, a 6.5-inch case length, and a 0.5-meter total cable length. This non-contacting displacement probe uses an eddy-current measurement field to monitor shaft vibration and axial position in critical industrial machinery. This configuration is built with a standard coaxial cable terminating in a miniature male ClickLoc connector and includes international multiple approvals (CSA, ATEX, IECEx) for hazardous areas.

The 3300 NSv transducer system is applied in tight-clearance situations where target geometries are extremely small or clearances are restricted, allowing installation on smaller machinery shafts that cannot accommodate standard 8 mm probes. While standard probes require larger target areas, the 3300 NSv series operates with a shaft diameter as small as 8.9 mm (0.35 inches), providing precise proximity measurement for aeroderivative gas turbines, centrifugal compressors, and other high-speed rotating equipment.

Features

• Standard mount 1/4-28 UNF threaded case without protective armor
• 0.0 inches unthreaded length with a 6.5-inch overall case length
• 0.5 meters (20 inches) integrated 75-ohm coaxial cable length
• Miniature male coaxial ClickLoc connector with standard cable type
• Multiple hazardous area agency approvals (Option 05)
• 1.5 mm (60 mils) linear range beginning at 0.25 mm (10 mils) from the target
• Scale factor of 7.87 V/mm (200 mV/mil) for compatibility with standard monitoring systems

Applications

• Radial vibration and axial position measurement on machinery with limited target clearances
• High-speed industrial turbomachinery and aeroderivative gas turbines
• Centrifugal compressors, pumps, and fans with small-bore shaft dimensions
• Shaft diameters from 8.9 mm (0.35 inches) up to 30 mm (1.2 inches)

Ordering Information

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Gap Adjustment: Maintain a recommended gap setting of 1.0 mm (40 mils) during installation. This corresponds to approximately -9 Vdc at the Proximitor Sensor output.
• Cross-Talk Prevention: If installing dual probes, maintain a minimum tip separation of 25 mm (1.0 in) for axial orientation or 23 mm (0.9 in) for radial/X-Y orientation to avoid electromagnetic cross-talk.
• Mounting Hole Specs: When drilling and tapping mounting holes for this 1/4-28 UNF threaded probe, a #3 or larger tap drill is recommended.
• Torque Limits: Tighten standard mount 1/4-28 UNF probe cases to a recommended torque of 5.1 N-m (45 in-lb). Do not exceed the maximum rated torque of 7.3 N-m (65 in-lb).

Compliance and Certifications