Bently Nevada 330780-90-CN 3300 XL 11 mm Proximity Sensor Transducer System

Bently Nevada 330780-90-CN 3300 XL 11 mm Proximity Sensor Transducer System

Precision Machinery Protection for Critical Industrial Assets

The Bently Nevada 330780-90-CN 3300 XL 11 mm Proximitor Sensor represents the gold standard in non-contact displacement and vibration measurement technology. As part of the renowned 3300 XL series, this advanced transducer system is engineered to provide exceptional machine condition monitoring for rotating equipment in the most demanding industrial environments .

Product Overview

The 330780-90-CN is the Proximitor sensor module that forms the intelligent core of the 3300 XL 11 mm proximity transducer system. When combined with a compatible 11 mm probe and extension cable, it delivers precise, real-time measurements of shaft vibration and axial position. This system is specifically designed for fluid-film bearing machines, offering a 3.94 V/mm (100 mV/mil) output characteristic that has become an industry standard for machinery protection .

Key Technical Specifications

Model Number: 330780-90-CN

Probe Diameter: 11 mm (larger tip for extended linear range)

Sensitivity: 7.87 mV/μm (200 mV/mil), ±5% 

Linear Range: Approximately 2 mm (80 mils) 

Frequency Response: 0 Hz to 10 kHz, capturing both static position and dynamic vibration 

Operating Temperature:

Probe: -51°C to +177°C (-60°F to +350°F)

Proximitor Module: -35°C to +85°C (-31°F to +185°F) 

Power Supply: -24 VDC typical, compatible with Bently Nevada monitoring systems 

Authentication Option: "CN" certification for hazardous area installations 

Superior Design Features

Extended Linear Measurement Range

The 11 mm probe tip provides a significantly longer linear range compared to standard 8 mm systems, making it ideal for applications requiring greater measurement span such as thrust position monitoring, differential expansion measurements, and reciprocating compressor rod position monitoring .

Advanced RFI/EMI Immunity

The 3300 XL Proximitor incorporates enhanced radio frequency interference and electromagnetic interference protection, achieving European CE certification without special installation requirements. This ensures stable operation even near high-frequency signals and electrical noise .

Robust Mechanical Construction

Housed in corrosion-resistant stainless steel with an IP65 or higher protection rating, the sensor withstands the harshest industrial conditions. The probe features PPS tip material and AISI 304 stainless steel housing for exceptional durability .

ClickLoc™ Connection Technology

Gold-plated brass ClickLoc connectors provide secure, vibration-proof connections between system components. These connectors lock firmly in place to prevent loosening, ensuring signal integrity in high-vibration environments .

System Compatibility and Upgrade Path

The 330780-90-CN is designed to integrate seamlessly with Bently Nevada 3500 monitoring systems and other compatible platforms. It serves as a direct upgrade replacement for older 7200 series 11 mm and 14 mm systems, offering improved performance and reliability. When upgrading, all components must be replaced with 3300 XL series components .

SpringLoc Terminals

The Proximitor module features SpringLoc terminal strips that enable faster, more secure field wiring without special installation tools, reducing installation time and improving connection reliability .

Typical Applications

The 3300 XL 11 mm system excels in critical rotating machinery applications:

Axial (thrust) position measurement for turbines and compressors

Radial vibration monitoring on large rotating equipment

Steam turbine case differential expansion measurements

Reciprocating compressor piston rod position and rod drop monitoring

Tachometer and zero-speed measurement applications

Phase reference (keyphasor®) signal generation