Bently Nevada 330908-00-30-10-01-CN 3300 NSv Proximity Probe

Description

Option 00 (0.0 in unthreaded length) and Option 30 (3.0 in overall case length) specify this 3300 NSv proximity probe configuration — 330908-00-30-10-01-CN. This unarmored probe features a 3/8-24 UNF thread, a 1.0 m (39 in) total length coaxial cable, and a miniature ClickLoc connector fitted with an integrated connector protector. The -CN suffix designates the China hazardous area approval package, which includes NEPSI and CCC certificates for deployment within regulated environments.

The probe operates within the 3300 XL NSv proximity transducer system to monitor machinery shaft displacement, radial vibration, or axial position where tight installation clearances, limited side-view clearances, or small shaft geometries prevent the use of standard 5 mm or 8 mm systems. This configuration uses a completely threaded case without stainless steel armor, facilitating installation in standard threaded mountings where external mechanical sheathing is not required.

Features

• Thread Design: 3/8-24 UNF-2A thread configuration with 0.0 inches of unthreaded length (fully threaded case) and a 3.0-inch overall case length.
• Cable Assembly: 1.0-meter (39 in) integrated FEP-insulated coaxial cable equipped with a miniature ClickLoc connector and fluorosilicone connector protector.
• Mechanical Protection: Unarmored cable construction minimizes weight and bend radius constraints for installations in protected conduits or enclosures.
• Chemical Resistance: Polyphenylene sulfide (PPS) probe tip material for chemical compatibility in process compressor environments.
• Regional Compliance: -CN country package provides certified NEPSI and CCC safety markings for China.

Applications

Typical applications for the 330908-00-30-10-01-CN probe include:

• Radial vibration and axial position monitoring on centrifugal air compressors and process gas compressors.
• Thrust position measurements on high-speed rotating equipment with tight internal clearances.
• Vibration measurements on small-diameter shafts under 51 mm (2.0 in) where standard probes cannot maintain linear calibration.
• Tachometer, zero-speed, and Phase Reference (Keyphasor) applications with small targets.

Ordering Information

Technical Specifications

Installation Guidelines

• Probe Gapping: Set the mechanical probe gap to 1.0 mm (40 mils) using a physical feeler gauge or by monitoring the Proximitor Sensor output voltage (-9.0 Vdc nominal) under target conditions.
• Case Torque Limit: Install the probe into the threaded mounting using a torque wrench. Tighten the 3/8-24 UNF case to the recommended torque of 11.3 N m (100 in-lb), taking care not to exceed the absolute maximum limit of 33.9 N m (300 in-lb).
• Thread Engagement: Ensure total thread engagement length does not exceed 0.563 inches (1.5 times the nominal thread diameter) to avoid thread binding.
• Connector Connection: Ensure ClickLoc coaxial connectors are secured finger-tight. Slide the pre-installed fluorosilicone connector protector completely over the connection to form a liquid-tight seal against process oils and moisture.
• Cable Bend Radius: Maintain a minimum physical bend radius of 25.4 mm (1.0 in) for the unarmored coaxial cable during routing to prevent core or shield fatigue.

Compliance and Certifications

• Hazardous Area Approvals: NEPSI and CCC certified for explosion-proof and intrinsically safe applications within China (-CN country package).
• CE Mark: Fully compliant with European EMC Directive 2014/30/EU and RoHS Directive 2011/65/EU.
• Functional Safety: Certified SIL 2 (HFT=0) and SIL 3 (HFT=1) capable when incorporated into a complete safety instrumented system.
• Maritime: Meets standard conditions of classification for marine and offshore installations.