330851-02-000-050-10-01-CN Bently Nevada 25mm Probe

Product Overview

The Bently Nevada 330851-02-000-050-10-01-CN is a heavy-duty 3300 XL 25mm proximity probe designed for long-range displacement sensing and machinery protection. This 25mm series probe offers a significantly larger linear range compared to standard 8mm probes, making it ideal for monitoring differential expansion or axial position on large steam turbines and industrial compressors. Built with high-performance stainless steel and ruggedized armor, it provides stable, high-resolution measurements even in chemically aggressive or high-vibration industrial environments.

Technical Configuration

Precision 25mm Sensing Technology

As part of the 3300 XL family, this probe is engineered for maximum accuracy in non-contact displacement monitoring. The 25mm probe tip allows for an extended gap range, which is critical for applications where machine components undergo significant thermal expansion. This hardware is factory-calibrated to provide a linear output when gapped against AISI 4140 steel, ensuring seamless integration with standard Proximitor sensors.

Robust Armor & Threading

The hardware configuration for the 330851-02-000-050-10-01-CN includes a durable M30 x 2 threaded case with a 50mm overall length. To protect the sensitive coaxial internals, the 1.0-meter cable is encased in high-grade stainless steel armor. This protective layer prevents crushing, kinking, and abrasion during installation and long-term operation in tight machine housings.

Technical Specifications

Installation & Maintenance Guide

• Mechanical Installation: Ensure the mounting bracket is compatible with the M30 x 2 thread and provides a rigid foundation to avoid false vibration readings.
• Cable Management: The stainless steel armor provides excellent protection, but care should still be taken to maintain a minimum bend radius. Do not subject the lead cable to excessive tension.
• Connection: Ensure the probe connector is clean and dry before mating with the extension cable. Proper torque on the connector prevents signal loss due to machine vibration.

Engineering Advantages

This proximity solution provides a reliable answer for critical expansion measurements where smaller probes fall short. Its 25mm tip offers superior signal stability and a wider linear range, which is vital for monitoring the relative motion of large rotors. By utilizing stainless steel armor and country-specific (CN) approvals, this probe is ready for global deployment in high-stakes energy and manufacturing facilities, ensuring compliance with API 670 standards for machinery protection.

Technical FAQs

Q1: Can I use this 25mm probe with a Proximitor designed for 8mm probes?
A1: No. This model must be used with a 3300 XL 25mm Proximitor Sensor to ensure proper calibration and linear output.

Q2: What is the benefit of the Stainless Steel Armor?
A2: The armor significantly increases physical durability, protecting the internal cable from oil, moisture, and mechanical impact.

Q3: Does the probe require field calibration for AISI 4140 steel?
A3: No. The unit is factory-calibrated for 4140 steel. Field verification is recommended during installation, but adjustments are rarely necessary.