330851-02-000-080-50-00-05 Bently Nevada 3300 XL 25mm Probe

Product Overview

The Bently Nevada 330851-02-000-080-50-00-05 is a rugged 3300 XL 25 mm proximity probe specifically engineered for maximum survivability in the harshest steam turbine Differential Expansion (DE) environments. This large-scale sensor is designed to replace legacy 7200 25mm and 35mm systems, offering superior accuracy and thermal resilience.

Proudly Made in the U.S.A., this probe features a robust M30x2 threaded case and a 5.0-meter total length, providing the extended range and durability required for large rotating machinery protection.

Technical Configuration

• Model: 330851 (3300 XL 25 mm Proximity Probe)
• Probe Case Type (-02): M30x2 Thread
• Unthreaded Length (-000): 0 inches
• Overall Case Length (-080): 80 mm
• Total Length (-50): 5.0 meters (16.4 feet)
• Armor Option (-00): No Armor
• Agency Approval (-05): Multiple Approvals (Intrinsically Safe & Non-Incendive)

Technical Specifications

Engineered for Extremes

The 3300 XL 25 mm probe is built to endure. Its PEEK tip and FluidLoc triaxial cable ensure signal integrity even when exposed to high-pressure steam and turbine oils. With a short-term temperature rating of +250 °C (482 °F), it provides a safety margin for unexpected thermal excursions, ensuring your critical machinery remains protected during peak loads.

Certifications & Compliance

This probe meets global standards for hazardous area installations, including ATEX/IECEx for Zone 0 and Zone 2, and Class I, Division 2 groups A, B, C, and D. It is also compliant with maritime standards (ABS) and the RoHS Directive, making it suitable for both offshore and land-based power generation applications.

Technical FAQs

Q1: Can this probe replace my existing 7200 series 25mm probe?

A1: Yes, the 330851 series is specifically designed as a physical and functional replacement for legacy 7200 25mm and 35mm transducer systems.

Q2: What is the benefit of the FluidLoc cable?

A2: The PFA-insulated FluidLoc cable prevents moisture and oil from wicking through the cable, which is essential for maintaining accuracy in steam-saturated environments.

Q3: How should I gap this probe?

A3: Proper gapping depends on your specific Proximitor sensor calibration. Given its 25mm diameter, it is intended for large-scale displacement measurements like turbine differential expansion.

Weight: 1.5 kg