Product Overview

330851-01-000-020-10-00-05 is a Bently Nevada 3300 XL 25 mm proximity probe designed for high range shaft displacement and vibration monitoring in large rotating machinery. It provides accurate non-contact measurement of shaft position and dynamic movement in turbines, compressors, generators, and heavy industrial drivetrains. The 25 mm sensing range supports applications requiring extended measurement capability beyond standard 8 mm probe systems.

This probe is widely used in power generation, oil and gas refining, marine propulsion systems, and large-scale industrial plants. It ensures stable operation in environments with high vibration, thermal variation, and mechanical stress. The SST armored design improves mechanical durability in harsh installation conditions, while maintaining signal stability for continuous condition monitoring systems.

Suffix Breakdown

• 330851 = 3300 XL 25 mm proximity probe series

• 01 = 1 1/4 -12 threaded probe case type

• 000 = unthreaded length 0 mm

• 020 = 20 mm overall case length

• 10 = 1.0 metre total cable length

• 05 = stainless steel armor configuration

• 05 = multiple agency approvals for industrial and hazardous applications

The probe structure supports direct integration with Bently Nevada proximitor systems, ensuring accurate gap voltage response and stable eddy current signal conversion in high-energy rotating equipment.

Technical Specifications

Technical FAQs

What is the advantage of a 25 mm proximity probe?
It provides extended measurement range for large shafts in turbines and heavy rotating machinery.

Can this probe work with standard 3300 XL proximitor systems?
Yes. It is designed for compatibility with Bently Nevada 3300 XL proximitor modules.

What does SST armor improve?
Stainless steel armor improves mechanical protection against abrasion, vibration, and harsh installation environments.

Is this probe suitable for high temperature environments?
Yes, within the standard operating limits of the 3300 XL probe system when properly installed.

Engineering & Installation Guide

Ensure correct mechanical alignment between probe tip and target surface to maintain linear response in shaft displacement measurement. Misalignment reduces signal accuracy.

Use SST armored routing in areas with high mechanical wear or vibration exposure. Avoid sharp bends near the probe cable exit point to prevent internal conductor fatigue.

Verify proper gap voltage calibration during commissioning. Incorrect gap setting directly impacts displacement measurement accuracy and alarm thresholds.