Proximity Probe Bently Nevada 330901-00-20-10-02-05

Product Overview

The Bently Nevada 330901-00-20-10-02-05 is a U.S.-manufactured, high-precision non-contact proximity probe from the 3300 XL NSv (Narrow System variant) Transducer line. This eddy current sensor is engineered for critical machinery protection, tracking dynamic shaft vibration, axial displacement, and phase reference timing on high-speed rotating assets. Tailored specifically for tight installation envelopes where side-view clearances are limited, its tightly constrained electromagnetic field prevents cross-talk with nearby structural counterbores or housing features, guaranteeing exceptional target visibility for small fluid-film bearing paths.

Technical Configuration

Model Configuration Breakdown

The alpha-numeric engineering code defines the exact hardware options selected for this high-performance probe configuration:

• 330901: Core model identifier specifying the high-precision 3300 XL NSv proximity probe with 1/4-28 UNF thread.
• 00: Zero unthreaded length profile, establishing a fully threaded outer barrel structure.
• 20: Extended 2.0-inch reinforced stainless steel case length designed to span thick machine casings.
• 10: 39-inch (1.0-meter) flexible FEP coaxial cable system delivering a balanced electrical length.
• 02: ClickLock™ miniature coaxial connector interface offering robust mechanical retention.
• 05: Multi-agency compliance certification, approving the unit for ATEX, IECEx, and CSA Class I Div 2 hazardous environments.

Technical Specifications

Installation Guide

Mechanical Threading and Clearance Boundaries

Thread the 2.0-inch unarmored steel probe housing smoothly into the mounting hole. Given its lightweight structure built to a 150g maximum vibration-ready weight, use hand tools to prevent over-torque. Carefully adjust the probe depth so that the tip does not pass the maximum 0.375-inch thread engagement limit inside the local mounting bracket, preventing physical interference with internal rotating machinery elements.

Cable Isolation and Protective Routing

Route the 1.0-meter integrated FEP coaxial cable away from high-temperature exhaust headers or structural sharp points. The FEP insulation jacket protects against moisture and aggressive chemical solvents, but adding an external conduit over long cable spans provides the best armor against mechanical impact. Ensure you do not bend the cable past its minimum bend radius to keep the 75 Ω signal paths clean.

Coaxial ClickLock™ Joint Assembly

Align the miniature coaxial pins of the ClickLock™ joint and snap the probe lead directly into the corresponding extension cable loop. Slide a clear, specialized silicone insulator sleeve completely over the final connector link to ensure IP67 equivalent sealing, protecting the 4.2 Ω DC circuit against ground loop leaks or oil mist intrusion.

Engineering Advantages

Certified Hazardous Area Security

Equipped with option 05 compliance status, this probe is certified under international ATEX, IECEx, and CSA Class I Div 2 mandates. This certification ensures the internal electrical circuits cannot generate sparks or thermal hazards, providing exceptional protection for gas turbines or hydrocarbon pumps running in volatile conditions.

High-Frequency Mechanical Toughness

The 330901-00-20-10-02-05 probe features an advanced design capable of withstanding intense 15G structural vibrations across a broad 10 to 2000 Hz spectrum. It maintains a steady line impedance of 75 Ω with less than 0.5 dB of signal loss at 1 MHz, providing reliable telemetry data under aggressive plant floor stresses.

Technical FAQs

Q1: Can this fully threaded 2.0-inch probe be adjusted to mimic a shorter unthreaded length?

A1: Yes. Because this probe features the "00" unthreaded configuration, the 1/4-28 UNF threads run down the entire 2.0-inch length. You can use two jam nuts to lock the probe securely at shallow depths inside your mounting bracket.

Q2: Why must the thread engagement be constrained strictly beneath 0.375 inches?

A2: Limiting thread engagement protects the probe tip. Pushing the stainless steel barrel too deep into internal machine cavities can contact the rotating shaft, causing damage to the sensor and the machine.

Q3: Is the 330901-00-20-10-02-05 probe backwards compatible with standard 3300 XL 5mm systems?

A3: No. The NSv series utilizes a unique 75 Ω characteristic line impedance and concentrated calibration metrics. It must be paired with an NSv extension cable and an NSv Proximitor sensor to achieve the certified ±0.25% thermal linearity accuracy.