330905-00-10-05-02-05 Bently Nevada 0.5m Non-Armored Proximity Probe

Product Overview

The 330905-00-10-05-02-05 is a premium, unarmored 3300 NSv eddy current proximity probe manufactured by Bently Nevada for high-precision machinery diagnostics. Featuring an M10x1 threaded case design with a lightweight, standard unarmored mass profile of 34 g/m for its FEP coaxial cable, this 0.5-meter transducer accurately tracks axial displacement, radial vibration, and shaft speed. Engineered with advanced chemical resilience and superior side-view clearances, it is optimized for tight spaces inside industrial process compressors, pumps, and high-speed steam turbines where standard probes encounter side-wall interference.

Core Technical Advantages

• Detailed Suffix Logic Breakdown:
  • -00-: Selects 0 mm of unthreaded length on the main probe barrel.
  • -10-: Specifies an extended 100 mm overall case length for deeper insertion depth.
  • -05-: Configures a total physical and electrical cable length of 0.5 meters (20 inches).
  • -02-: Integrates a miniature coaxial ClickLoc connector on a standard, non-armored FEP line.
  • -05-: Provides multiple global hazardous area agency safety certifications and approvals.
• Enhanced Chemical Resistance: Features a high-grade Polyphenylene Sulfide (PPS) tip and an AISI 304 stainless steel case, offering significantly higher resistance to corrosive industrial gases than legacy 3300 RAM setups.
• Strict Calibration Accuracy: Delivers a calibrated Incremental Scale Factor (ISF) of 7.87 V/mm (200 mV/mil) over a 1.5 mm (60 mils) linear spectrum, backed by an internal terminal resistance of 4.0 $\pm$ 0.5 $\Omega$.
• Narrow-Field Side Clearance: Engineered with a focused eddy current field that outperforms legacy 3000-series 190 probes, allowing the tip to sit near counterbores or recessed walls without experiencing signal distortion.

Technical Specifications

Installation & Maintenance Guide

Case Mounting and Torque Limits

When screwing the 100mm case into mounting brackets, ensure the maximum thread engagement length does not exceed 15 mm. For the first three active threads, the absolute maximum rated torque is 22.6 N·m (200 in·lb). To prevent case distortion and maintain threads, engineers recommend tightening to a nominal torque of 7.5 N·m (66 in·lb).

Connector and Bend Radius Management

The miniature coaxial ClickLoc connector clicks firmly into place with a secure latch. Connectors should be mated finger-tight, with a maximum torque limit of 0.56 N·m (5 in·lb). Route the unarmored FEP cable smoothly, ensuring a strict minimum bend radius of 25.4 mm (1.0 inch) to safeguard internal conductor layers.

Target Diameter and Gapping Requirements

For optimum accuracy against standard AISI 4140 steel targets, the flat target surface requires a recommended minimum diameter of 13 mm (0.5 in). If tracking shafts smaller than 13mm, scale factor changes will occur. Reduce the gap setting below the default 1.0 mm (40 mils) recommendation to minimize these errors.

Engineering Advantages

• Drop-In Retrofitting: Fully mechanically and electrically interchangeable with legacy Bently Nevada 3300 RAM proximity probes, enabling asset monitoring system upgrades without rewiring entire cabinets.
• Reduced Mechanical Load: At an ultralight 34 g/m for the unarmored line, this 0.5m probe configuration introduces minimal mechanical strain, preventing terminal connector fatigue inside internal junction boxes.
• High Humidity Stability: Exhibits exceptional environmental protection, sustaining less than a 3% change in Average Scale Factor (ASF) when subjected to 93% relative humidity for up to 56 days under IEC 68-2-3 standards.

Technical FAQs

Q1: Why is this 3300 NSv probe body configured with 0mm unthreaded length (-00-)?
A1: The 0mm unthreaded length option means the entire 100mm case length is fully threaded. This allows maximum adjustment flexibility through bracket sleeves, making it ideal for deep-recessed port designs.

Q2: Can this 0.5-meter probe connect directly to a monitor rack without an extension cable?
A2: No. Eddy current proximity systems are calibrated for precise total electrical lengths (typically 5.0m or 9.0m). This 0.5m probe must be matched with a corresponding 3300 NSv extension cable to achieve the required overall system length.

Q3: Is the internal Viton O-ring pressure tested at the factory prior to shipping?
A3: No, standard builds are designed and rated to seal pressure differentials, but they are not pressure tested before leaving the factory. If your process compressor mandates certified seals, contact our application team for a custom test option.