330851-02-000-030-50-01-00 | Bently Nevada Probe Armor

Bently Nevada 330851-02-000-030-50-01-00 3300 XL 25mm Proximity Probe

Product Overview

The 330851-02-000-030-50-01-00 is a heavy-duty 25mm eddy current proximity probe from Bently Nevada, specifically designed for large-scale machinery protection systems. Part of the 3300 XL series, this probe provides a 5.0-meter total system length and features an M30x2 threaded case for robust mounting.

Core Technical Advantages

This proximity probe utilizes a high-grade PEEK tip and a 304 stainless steel case, ensuring measurement consistency of 0.05mm even in the presence of steam or high humidity (98% RH). The unit is built for extreme conditions, supporting continuous operation at temperatures up to 200°C (392°F) and surge capacity up to 250°C. With integrated stainless steel (SST) armor, the probe is protected against mechanical damage and chemical exposure, while the 75Ω triaxial cable ensures impedance stability of ±1.5% for precise signal transmission over its entire 5.0-meter length.

Technical Specifications

Installation & Engineering Guide

Correct installation is critical for the long-term reliability of Bently Nevada sensing systems. The M30 housing should be tightened to a recommended torque of 68 N·m, though it can withstand up to 163 N·m if required by specific mechanical constraints. Ensure the probe tip is correctly gapped relative to the target material using a compatible Proximitor® sensor. The 5.0-meter armored cable should be secured with appropriate clips to prevent fatigue from machine vibration, and all electrical connections should be verified to meet EMC compliance standards (EN 61000-6-2/4) to minimize signal noise.

Engineering Advantages

The 3300 XL 25mm system is a globally recognized standard for industrial machinery protection, holding certifications such as ABS Maritime and ATEX Zone 0/2 for hazardous environments. This probe's enhanced thermal and mechanical resilience significantly reduces the total cost of ownership by extending maintenance intervals and preventing false alarms. The use of premium materials like PEEK and 304 SST ensures that the probe remains resistant to oil, water, and various industrial solvents, providing a reliable safety layer for high-capital-value rotating machinery.

Technical FAQs

Q1: Is this probe compatible with standard 3300 XL Proximitor sensors?
A1: Yes, this probe is designed to work as part of the 3300 XL 25mm proximity transducer system and must be paired with the correct 3300 XL Proximitor for accurate linear output.

Q2: What are the benefits of the SST armor on this specific model?
A2: The stainless steel armor provides a physical barrier against crushing, abrasion, and sharp industrial debris, which is essential for protecting the internal triaxial cable in harsh turbine deck environments.

Q3: Can this probe operate in hazardous locations?
A3: Yes, this Bently Nevada probe meets ATEX and North American standards for intrinsically safe operation in Zone 0 and Zone 2 areas when used with appropriate safety barriers.