330905-00-08-10-02-05 Bently Nevada 1m ClickLoc Proximity Probe

Product Overview

The 330905-00-08-10-02-05 is a high-precision, unarmored 3300 NSv eddy current proximity probe engineered by Bently Nevada for demanding machine diagnostics. Featuring an M10x1 threaded case and a total mass profile of 34 g/m for the 1.0-meter standard unarmored extension lines, this probe precisely monitors radial shaft vibration, axial position, and speed. Designed with enhanced chemical resistance, it replaces legacy 3300 RAM setups seamlessly and excels inside process compressors, steam turbines, and pumps where tight side-view clearances restrict standard sensor deployment.

Core Technical Advantages

• Detailed Suffix Logic Breakdown:
  • -00-: Dictates 0 mm of unthreaded length on the main barrel.
  • -08-: Specifies a robust 80 mm overall case length.
  • -10-: Provides a total electrical and physical cable length of 1.0 meter (39 inches).
  • -02-: Equips a miniature coaxial ClickLoc connector with a standard 75 $\Omega$ FEP jacket.
  • -05-: Inherits multiple international hazardous area safety approvals and certifications.
• Elite Process Survivability: Outfitted with a Polyphenylene Sulfide (PPS) tip and AISI 304 Stainless Steel case, rated to withstand severe differential pressures via an internal Viton O-ring seal.
• Strict Electrical Accuracy: Delivers a baseline Incremental Scale Factor (ISF) of 7.87 V/mm (200 mV/mil) over a 1.5 mm (60 mils) linear range with an internal resistance of 4.2 $\pm$ 0.5 $\Omega$.
• Advanced Side-View Profile: Features specialized narrow-beam electronics that allow accurate target tracking near counterbores and housing walls without side-wall interference.

Technical Specifications

Installation & Maintenance Guide

Case Torque Constraints

When installing the M10x1 threaded case into a machine housing, do not exceed a maximum engagement depth of 15 mm. For the first three threads, the absolute maximum rated torque is 22.6 N·m (200 in·lb); however, engineers recommend keeping the mounting torque to 7.5 N·m (66 in·lb) to prevent case distortion.

Connector Handling and Bend Radius

The ClickLoc miniature coaxial connector provides a secure connection with a simple click. Join the connectors finger-tight up to a maximum torque threshold of 0.56 N·m (5 in·lb). Maintain a strict minimum bend radius of 25.4 mm (1.0 inch) across the FEP jacket to prevent internal conductor degradation or impedance spikes.

Target Sizing Requirements

For optimum accuracy, target surfaces should be a minimum of 13 mm (0.5 in) in diameter. If tracking axial targets smaller than 8.9 mm (0.35 in), the scale factor will shift. In these configurations, reduce the hardware gap below the standard 1.0 mm baseline setting to mitigate interpolation errors.

Engineering Advantages

• Superior Fluid Barrier: Integrated Viton O-rings isolate differential machine pressures, halting oil migrations along the cable assembly lines.
• Low-Mass Structural Load: Weighing only 34 g/m for the unarmored version (compared to 103 g/m for armored options), this probe limits hanging load stress and cable droop within standard wiring layouts.
• Minimized Cross-Talk: High deviation limits (DSL within $\pm$0.06 mm) maintain precise measurements over standard AISI 4140 steel, ensuring high control loop accuracy.
• Backward Capability: Mechanically and electrically interchangeable with standard 3300 RAM components, allowing drop-in upgrades without requiring rack modifications.

Technical FAQs

Q1: What are the application limitations of the silicone tape included with the ClickLoc interface?
A1: While silicone tape offers basic atmospheric sealing over the connector joints, it is not recommended for environments exposed to persistent turbine oil. For long-term immersion, utilize rigid, oil-tight connector sleeves.

Q2: Why does the 3300 NSv series excel in narrow cross-bore spaces?
A2: The 3300 NSv probe uses a tight, focused magnetic field. This design achieves higher side-view clearance performance than older 3000-series sensors, minimizing false errors caused by proximity to surrounding metal walls.

Q3: What happens if the extension cable routing distance exceeds 305 meters?
A3: Exceeding 305 meters (1,000 feet) of triad field wiring introduces electrical capacitance filters ($69.9\text{ pF/m}$ average). This can lead to high-frequency signal roll-off and attenuation above 10 kHz, which may lower system calibration accuracy.