Bently Nevada 330850-51-CN 3300 XL 25 mm Proximitor Sensor Precision Machinery Protection

The Bently Nevada 330850-51-CN is a high-performance 3300 XL 25 mm Proximitor Sensor designed for continuous, non-contact measurement of rotor displacement and vibration in critical rotating machinery . As part of Baker Hughes (GE) Bently Nevada product line, this advanced proximity transducer system is the industry standard for protecting turbomachinery including steam turbines, gas compressors, and generators .

Key Technical Specifications

Model Number: 330850-51-CN

Series: 3300 XL 25 mm System

Configuration: 5-meter system with DIN rail mounting capability

Operating Temperature: -51°C to +100°C

Voltage Range: -17.5 Vdc to -26 Vdc

Output Resistance: 50Ω

Housing Material: A380 aluminum

Weight: 255g (9 oz)

Certifications: CE, FCC Part 15, EN 61000-6-2/4, ABS maritime 

The "-CN" suffix indicates country-specific compliance approvals, ensuring the sensor meets regional regulatory requirements .

Advanced Design Features

Enhanced RFI/EMI Immunity

The 330850-51-CN features improved radio frequency interference (RFI) and electromagnetic interference (EMI) protection, achieving European CE mark approvals without special mounting considerations . This ensures reliable operation even near high-frequency radio signals.

Tool-Free SpringLoc Terminals

Innovative SpringLoc terminal strips enable fast, robust field wiring connections without requiring special installation tools, significantly reducing installation time and improving reliability .

Flexible Mounting Options

The slim-profile design supports both high-density DIN-rail mounting and traditional panel mount configurations, making it ideal for space-constrained control cabinets .

System Architecture

The 3300 XL 25 mm system consists of three key components that work together:

3300 XL 25 mm Proximity Probe

3300 XL Extension Cable (optional)

330850-51-CN Proximitor Sensor (signal conditioner) 

When upgrading from legacy 7200 series systems, all three components must be replaced together to ensure proper functionality .

Application Benefits

Predictive Maintenance: Enables early fault detection to prevent catastrophic failures

Non-Contact Operation: Eliminates mechanical wear for extended service life

Backward Compatibility: Output matches 7200 and 25 mm DE systems, allowing monitor upgrades without reconfiguration 

Factory Calibrated: Standard calibration for AISI 4140 steel targets ensures accuracy 

The Bently Nevada 330850-51-CN 3300 XL 25 mm Proximitor Sensor delivers uncompromising reliability for mission-critical machinery protection. With its rugged construction, enhanced immunity to interference, and user-friendly installation features, it represents the gold standard for vibration and position monitoring in industrial applications worldwide.